SmartStop Self Storage REIT (STSFF) S-4 11 Dec 20 Registration of securities issued in business combination transactions Financial data

Cover Page

Cover Page	9 Months Ended
	Sep. 30, 2020
Cover [Abstract]
Document Type	S-4
Amendment Flag	false
Entity Registrant Name	SmartStop Self Storage REIT, Inc.
Entity Central Index Key	0001585389
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($)	Sep. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Real estate facilities:
Land	$ 332,142,096	$ 332,350,688	$ 269,522,776
Buildings	795,686,781	780,969,455	507,580,145
Site improvements	63,208,443	60,505,225	43,193,105
Real estate investment property, gross	1,191,037,320	1,173,825,368	820,296,026
Accumulated depreciation	(106,556,223)	(83,692,491)	(54,264,685)
Real estate investment property	1,084,481,097	1,090,132,877	766,031,341
Construction in process	1,591,793	12,237,722	130,383
Real estate facilities, net	1,086,072,890	1,102,370,599	766,161,724
Cash and cash equivalents	36,747,083	62,279,757	10,272,020
Restricted cash	9,787,127	6,291,366	3,740,188
Investments in and advances to Managed REITs	8,178,896	6,072,399
Other assets, net	5,870,035	6,318,037	14,580,417
Debt issuance costs, net of accumulated amortization	4,774,227	7,629,390	36,907
Intangible assets, net of accumulated amortization	13,237,876	30,040,426	1,562,781
Trademarks, net of accumulated amortization	16,229,412	19,688,167
Goodwill	53,643,331	78,372,980
Total assets	1,229,766,650	1,311,433,731	796,354,037
LIABILITIES AND EQUITY
Debt, net	712,789,410	712,733,002	406,084,103
Accounts payable and accrued liabilities	23,656,005	18,576,230	7,691,990
Due to affiliates	818,665	1,624,474	2,203,837
Distributions payable	6,017,893	5,159,105	2,890,395
Contingent earnout	26,000,000	31,100,000
Deferred tax liability	3,310,241	6,609,571
Total liabilities	772,592,214	775,802,382	418,870,325
Commitments and contingencies (Note 12)
Redeemable common stock / Preferred stock	54,116,173	43,391,362	32,226,815
Equity:
Additional paid-in capital	492,156,465	491,433,240	500,474,807
Distributions	(155,013,319)	(128,642,787)	(94,248,326)
Accumulated deficit	(136,914,972)	(87,090,486)	(62,340,153)
Accumulated other comprehensive income (loss)	(4,902,696)	(1,955,335)	1,390,354
Total SmartStop Self Storage REIT, Inc. equity	195,385,785	273,803,767	345,334,653
Noncontrolling interests in our Operating Partnership	61,270,970	71,988,256	(77,756)
Other noncontrolling interests	21,800	21,800
Total noncontrolling interests	61,292,770	72,010,056	(77,756)
Total equity	256,678,555	345,813,823	345,256,897
Total liabilities and equity	1,229,766,650	1,311,433,731	796,354,037
Class A Common stock
Equity:
Common stock, value	52,454	51,435	50,437
Class T Common stock
Equity:
Common stock, value	7,853	7,700	$ 7,534
Series A Convertible Preferred Stock
LIABILITIES AND EQUITY
Redeemable common stock / Preferred stock		146,426,164
Equity:
Common stock, value	$ 146,379,708	$ 146,426,164

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($)	Sep. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Preferred Stock
Preferred Stock, par value	$ 0.001	$ 0.001	$ 0.001
Preferred Stock, shares authorized	200,000,000	200,000,000	200,000,000
Series A Convertible Preferred Stock
Preferred Stock, par value	$ 0.001	$ 0.001	$ 0.001
Preferred Stock, shares authorized	200,000	200,000	200,000
Preferred Stock, shares issued	150,000	150,000	0
Preferred Stock, shares outstanding	150,000	150,000	0
Preferred Stock, liquidation preference, value	$ 152,472,054	$ 151,665,753
Class A Common stock
Common Stock, par value	$ 0.001	$ 0.001	$ 0.001
Common Stock, shares authorized	350,000,000	350,000,000	350,000,000
Common Stock, shares issued	52,453,575	51,435,124	50,437,059
Common Stock, shares outstanding	52,453,575	51,435,124	50,437,059
Class T Common stock
Common Stock, par value	$ 0.001	$ 0.001	$ 0.001
Common Stock, shares authorized	350,000,000	350,000,000	350,000,000
Common Stock, shares issued	7,852,830	7,699,893	7,533,790
Common Stock, shares outstanding	7,852,830	7,699,893	7,533,790

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues:
Total revenues	$ 31,363,122	$ 29,588,014	$ 91,130,790	$ 79,451,856	$ 109,528,549	$ 80,412,257	$ 76,108,906
Operating expenses:
Impairment of goodwill and intangible assets	0	0	36,465,732	0
Impairment of investments in Managed REITs	0	0	4,376,879	0
General and administrative	4,012,072	3,519,557	11,829,732	7,000,627	10,461,453	4,848,447	3,457,907
Depreciation	8,003,587	7,639,190	23,562,701	21,928,108	29,605,278	20,379,694	19,939,856
Intangible amortization expense	1,587,899	3,741,046	8,475,682	7,822,354	11,493,394	2,422,997	13,512,217
Contingent earnout expense	1,600,000	300,000	(5,100,000)	300,000	200,000	0	0
Self administration transaction expenses	0	107,100	0	1,595,371	1,572,238	0	0
Acquisition expenses – affiliates	0	0	0	84,061	84,061	72,179	212,577
Other property acquisition expenses	468,577	25,529	593,903	109,765	141,489	1,054,159	292,022
Total operating expenses	26,992,137	27,773,486	115,857,438	74,919,300	101,885,233	64,260,814	72,533,795
Gain on sale of real estate					3,944,696	0	0
Operating income (loss)	4,370,985	1,814,528	(24,726,648)	4,532,556	11,588,012	16,151,443	3,575,111
Other income (expense):
Interest expense	(8,093,476)	(10,260,936)	(24,717,208)	(28,584,740)	(37,563,247)	(18,002,274)	(16,356,565)
Interest expense – accretion of fair market value of secured debt	32,788	33,191	98,337	98,850	131,611	413,353	340,382
Interest expense – debt issuance costs	(952,479)	(1,082,543)	(2,832,240)	(2,997,801)	(3,996,676)	(1,582,049)	(2,177,833)
Net loss on extinguishment of debt	0	0	0	(1,487,867)	(2,647,633)	0	0
Gain resulting from acquisition of unconsolidated affiliates	0	0	0	8,017,353	8,017,353	0	0
Other	185,685	(45,819)	2,914,840	(352,219)	(624,958)	(701,203)	(367,385)
Net loss	(4,456,497)	(9,541,579)	(49,262,919)	(20,773,868)	(25,095,538)	(3,720,730)	(14,986,290)
Net loss attributable to the noncontrolling interests in our Operating Partnership	585,360	1,326,753	6,550,455	1,455,039	2,010,959	22,353	122,225
Less: Distributions to preferred stockholders	(2,387,977)	0	(7,112,022)	0	(1,665,754)	0	0
Net loss attributable to SmartStop Self Storage REIT, Inc. common stockholders	(6,259,114)	(8,214,826)	(49,824,486)	(19,318,829)	(24,750,333)	(3,698,377)	(14,864,065)
Self Storage Rental Revenue
Revenues:
Total revenues	26,706,201	25,669,615	77,221,013	74,056,235	99,494,560	78,473,091	75,408,257
Ancillary Operating Revenue
Revenues:
Total revenues	1,431,952	1,188,934	3,768,213	2,589,985	3,706,700	1,939,166	700,649
Managed REIT Platform Revenue
Revenues:
Total revenues	2,051,021	1,192,665	5,687,701	1,221,727	3,068,306	0	0
Operating expenses:
Operating expenses			2,512,103			0	0
Reimbursable Costs from Managed REITs
Revenues:
Total revenues	1,173,948	1,536,800	4,453,863	1,583,909	3,258,983	0	0
Operating expenses:
Operating expenses	1,173,948	1,536,800	4,453,863	1,583,909	3,258,983	0	0
Property Operating Expenses
Operating expenses:
Operating expenses	9,816,774	9,655,599	28,686,843	26,630,201	35,723,111	25,228,704	24,487,854
Property Operating Expenses – Affiliates
Operating expenses:
Operating expenses	0	0	0	6,605,670	6,605,670	$ 10,254,634	$ 10,631,362
Managed REIT Platform Expenses
Operating expenses:
Operating expenses	$ 329,280	$ 1,248,665	$ 2,512,103	$ 1,259,234	$ 2,739,556
Class A Common stock
Other income (expense):
Net loss per share-basic and diluted	$ (0.10)	$ (0.14)	$ (0.84)	$ (0.33)	$ (0.42)	$ (0.06)	$ (0.27)
Weighted average shares outstanding-basic and diluted	52,019,749	50,789,174	51,654,459	50,650,524	50,734,472	49,902,967	48,781,865
Class T Common stock
Other income (expense):
Net loss per share-basic and diluted	$ (0.10)	$ (0.14)	$ (0.84)	$ (0.33)	$ (0.42)	$ (0.06)	$ (0.27)
Weighted average shares outstanding-basic and diluted	7,827,572	7,626,158	7,776,909	7,584,645	7,607,654	7,441,250	7,240,953

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Loss - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net loss	$ (4,456,497)	$ (9,541,579)	$ (49,262,919)	$ (20,773,868)	$ (25,095,538)	$ (3,720,730)	$ (14,986,290)
Other comprehensive income (loss):
Foreign currency translation adjustment	1,069,449	(651,011)	(1,538,451)	1,408,709	2,371,517	(4,850,547)	3,947,683
Foreign currency hedge contract gains (losses)	(988,609)	(84,696)	1,645,735	(1,970,862)	(3,226,682)	5,251,438	(4,101,495)
Interest rate swap and cap contract gains (losses)	1,293,513	(823,250)	(3,509,682)	(4,000,275)	(2,575,366)	(379,745)	145,070
Other comprehensive gain (loss)	1,374,353	(1,558,957)	(3,402,398)	(4,562,428)	(3,430,531)	21,146	(8,742)
Comprehensive loss	(3,082,144)	(11,100,536)	(52,665,317)	(25,336,296)	(28,526,069)	(3,699,584)	(14,995,032)
Comprehensive loss attributable to noncontrolling interests:
Comprehensive loss attributable to the noncontrolling interests in our Operating Partnership	404,742	1,543,525	7,005,492	1,774,600	2,095,801	22,226	122,296
Comprehensive loss attributable to SmartStop Self Storage REIT, Inc. common stockholders	$ (2,677,402)	$ (9,557,011)	$ (45,659,825)	$ (23,561,696)	$ (26,430,268)	$ (3,677,358)	$ (14,872,736)

Consolidated Statements of Equi

Consolidated Statements of Equity - USD ($)	Total	Operating Partnership	SSGT Mergers	Self Administration Transaction	Redeemable Common Stock	Common StockClass A Common stock	Common StockClass T Common stock	Additional Paid-in Capital	Distributions	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Total SmartStop Self Storage REIT, Inc. Equity	Noncontrolling Interests	Noncontrolling InterestsOperating Partnership	Noncontrolling InterestsSSGT Mergers	Noncontrolling InterestsSelf Administration Transaction	Preferred Equity
Beginning Balance at Dec. 31, 2016	$ 410,632,923				$ 10,711,682	$ 47,174	$ 6,586	$ 480,692,731	$ (27,665,337)	$ (43,777,711)	$ 1,377,950	$ 410,681,393	$ (48,470)
Beginning Balance (in shares) at Dec. 31, 2016						47,174,543	6,585,799
Gross proceeds from issuance of common stock/preferred stock	17,311,370					$ 1,028	$ 565	17,309,777				17,311,370
Gross proceeds from issuance of common stock/preferred stock (in shares)						1,027,612	564,591
Offering costs	(1,748,589)							(1,748,589)				(1,748,589)
Equity based compensation expense	33,971							33,971				33,971
Changes to redeemable common stock	(16,004,705)	$ 4,875,454			16,004,705			(16,004,705)				(16,004,705)		$ 4,875,454
Redemptions of common stock	(188)				$ (2,219,328)	$ (181)	$ (7)					(188)
Redemptions of common stock (in shares)					(2,200,000)	(181,413)	(7,360)
Distributions	(32,896,167)								(32,896,167)			(32,896,167)
Distributions for noncontrolling interests	(277,290)												(277,290)
Issuance of shares for distribution reinvestment plan	16,006,277					$ 1,365	$ 207	16,004,705				16,006,277
Issuance of shares for distribution reinvestment plan (in shares)						1,365,350	207,112
Stock compensation expense	33,971							33,971				33,971
Net loss attributable to SmartStop Self Storage REIT, Inc.	(14,864,065)									(14,864,065)		(14,864,065)
Net loss attributable to the noncontrolling interests in our Operating Partnership	(122,225)												(122,225)
Foreign currency translation adjustment	3,947,683										3,947,683	3,947,683
Foreign currency forward contract gain (loss)	(4,101,495)										(4,101,495)	(4,101,495)
Interest rate swap and cap contract gains (losses)	145,070										145,070	145,070
Ending Balance at Dec. 31, 2017	382,938,024				$ 24,497,059	$ 49,386	$ 7,351	496,287,890	(60,561,504)	(58,641,776)	1,369,208	378,510,555	4,427,469
Ending Balance (in shares) at Dec. 31, 2017						49,386,092	7,350,142
Conversion of OP Units to common stock						$ 483		4,253,526				4,254,009	(4,254,009)
Conversion of OP Units to common stock (in shares)						483,124
Redemption of interest in subsidiary	(125,000)							(125,000)				(125,000)
Offering costs	(16,902)							(16,902)				(16,902)
Equity based compensation expense	75,293							75,293				75,293
Issuance of restricted stock	11					$ 11						11
Issuance of restricted stock (in shares)						10,500
Changes to redeemable common stock	(16,055,585)				16,055,585			(16,055,585)				(16,055,585)
Redemptions of common stock	(788)				$ (8,325,829)	$ (768)	$ (20)					(788)
Redemptions of common stock (in shares)					(8,300,000)	(768,313)	(19,664)
Distributions	(33,686,822)								(33,686,822)			(33,686,822)
Distributions for noncontrolling interests	(228,863)												(228,863)
Issuance of shares for distribution reinvestment plan	16,057,113					$ 1,325	$ 203	16,055,585				16,057,113
Issuance of shares for distribution reinvestment plan (in shares)						1,325,656	203,312
Stock compensation expense	75,293							75,293				75,293
Net loss attributable to SmartStop Self Storage REIT, Inc.	(3,698,377)									(3,698,377)		(3,698,377)
Net loss attributable to the noncontrolling interests in our Operating Partnership	(22,353)												(22,353)
Foreign currency translation adjustment	(4,850,547)										(4,850,547)	(4,850,547)
Foreign currency forward contract gain (loss)	5,251,438										5,251,438	5,251,438
Interest rate swap and cap contract gains (losses)	(379,745)										(379,745)	(379,745)
Ending Balance at Dec. 31, 2018	345,256,897				$ 32,226,815	$ 50,437	$ 7,534	500,474,807	(94,248,326)	(62,340,153)	1,390,354	345,334,653	(77,756)
Ending Balance (in shares) at Dec. 31, 2018						50,437,059	7,533,790
Offering costs	(2,418)							(2,418)				(2,418)
Issuance of limited partnership units in our Operating Partnership in connection with the SSGT Mergers/Self Administration Transaction/Operating Partnership	4,217,399														$ 4,217,399
Equity based compensation expense	21,957							21,957				21,957
Changes to redeemable common stock	(3,963,393)				3,963,393			(3,963,393)				(3,963,393)
Redemptions of common stock	(141)				(2,044,001)	$ (120)	$ (21)					(141)
Redemptions of common stock (in shares)						(120,000)	(21,291)
Distributions	(8,411,426)								(8,411,426)			(8,411,426)
Distributions for noncontrolling interests	(46,584)												(46,584)
Issuance of shares for distribution reinvestment plan	3,963,766					$ 323	$ 50	3,963,393				3,963,766
Issuance of shares for distribution reinvestment plan (in shares)						322,580	49,604
Stock compensation expense	21,957							21,957				21,957
Net loss attributable to SmartStop Self Storage REIT, Inc.	(8,891,558)									(8,891,558)		(8,891,558)
Net loss attributable to the noncontrolling interests in our Operating Partnership	(56,759)												(56,759)
Foreign currency translation adjustment	867,261										867,261	867,261
Foreign currency forward contract gain (loss)	(846,581)										(846,581)	(846,581)
Interest rate swap and cap contract gains (losses)	(1,315,092)										(1,315,092)	(1,315,092)
Ending Balance at Mar. 31, 2019	330,793,328				34,146,207	$ 50,640	$ 7,563	500,494,346	(102,659,752)	(71,231,711)	95,942	326,757,028	4,036,300
Ending Balance (in shares) at Mar. 31, 2019						50,639,639	7,562,103
Beginning Balance at Dec. 31, 2018	345,256,897				32,226,815	$ 50,437	$ 7,534	500,474,807	(94,248,326)	(62,340,153)	1,390,354	345,334,653	(77,756)
Beginning Balance (in shares) at Dec. 31, 2018						50,437,059	7,533,790
Net loss attributable to SmartStop Self Storage REIT, Inc.	(19,318,829)
Net loss attributable to the noncontrolling interests in our Operating Partnership	(1,455,039)
Interest rate swap and cap contract gains (losses)	(4,000,275)
Ending Balance at Sep. 30, 2019	360,622,181				39,839,496	$ 51,149	$ 7,650	491,272,437	(119,904,285)	(81,658,982)	(3,172,074)	286,595,895	74,026,286
Ending Balance (in shares) at Sep. 30, 2019						51,148,541	7,649,856
Beginning Balance at Dec. 31, 2018	345,256,897				32,226,815	$ 50,437	$ 7,534	500,474,807	(94,248,326)	(62,340,153)	1,390,354	345,334,653	(77,756)
Beginning Balance (in shares) at Dec. 31, 2018						50,437,059	7,533,790
Gross proceeds from issuance of common stock/preferred stock																	$ 150,000,000
Offering costs	(42,039)							(42,039)				(42,039)
Preferred equity issuance costs																	(3,573,836)
Issuance of limited partnership units in our Operating Partnership in connection with the SSGT Mergers/Self Administration Transaction/Operating Partnership			$ 4,217,399	$ 63,643,000											$ 4,217,399	$ 63,643,000
Issuance of limited partnership units in our Operating Partnership in exchange for special limited partnership interest	18,800,000							9,687,035				9,687,035	9,112,965
Equity based compensation expense	404,540							404,540				404,540
Contribution of special limited partnership interest in exchange for limited partnership interests in our Operating Partnership	(18,800,000)							(18,800,000)				(18,800,000)
Noncontrolling interests related to the consolidated Tenant Programs joint ventures	21,800												21,800
Redemption of limited partnership interests held by our Former Advisor	(200,000)							(291,103)				(291,103)	91,103
Issuance of restricted stock	252					$ 252						252
Issuance of restricted stock (in shares)						251,993
Changes to redeemable common stock	(16,045,030)				16,046,535			(16,045,030)				(16,045,030)
Redemptions of common stock	(592)				$ (4,881,988)	$ (557)	$ (35)					(592)
Redemptions of common stock (in shares)					(4,900,000)	(556,575)	(35,079)
Distributions	(34,394,461)								(34,394,461)			(34,394,461)
Distributions for noncontrolling interests	(2,902,654)												(2,902,654)
Issuance of shares for distribution reinvestment plan	16,046,534					$ 1,303	$ 201	16,045,030				16,046,534
Issuance of shares for distribution reinvestment plan (in shares)						1,302,647	201,182
Stock compensation expense	404,540							404,540				404,540
Net loss attributable to SmartStop Self Storage REIT, Inc.	(24,750,333)									(24,750,333)		(24,750,333)
Net loss attributable to the noncontrolling interests in our Operating Partnership	(2,010,959)												(2,010,959)
Foreign currency translation adjustment	2,371,517										2,311,488	2,311,488	60,029
Foreign currency forward contract gain (loss)	(3,226,682)										(3,030,727)	(3,030,727)	(195,955)
Interest rate swap and cap contract gains (losses)	(2,575,366)										(2,626,450)	(2,626,450)	51,084
Ending Balance at Dec. 31, 2019	345,813,823				$ 43,391,362	$ 51,435	$ 7,700	491,433,240	(128,642,787)	(87,090,486)	(1,955,335)	273,803,767	72,010,056				146,426,164
Ending Balance (in shares) at Dec. 31, 2019						51,435,124	7,699,893
Beginning Balance at Mar. 31, 2019	330,793,328				34,146,207	$ 50,640	$ 7,563	500,494,346	(102,659,752)	(71,231,711)	95,942	326,757,028	4,036,300
Beginning Balance (in shares) at Mar. 31, 2019						50,639,639	7,562,103
Offering costs	(1,559)							(1,559)				(1,559)
Issuance of limited partnership units in our Operating Partnership in connection with the SSGT Mergers/Self Administration Transaction/Operating Partnership	63,643,000															$ 63,643,000
Issuance of limited partnership units in our Operating Partnership in exchange for special limited partnership interest	18,800,000							9,687,035				9,687,035	9,112,965
Equity based compensation expense	25,136							25,136				25,136
Contribution of special limited partnership interest in exchange for limited partnership interests in our Operating Partnership	(18,800,000)							(18,800,000)				(18,800,000)
Noncontrolling interests related to the consolidated Tenant Programs joint ventures	21,800												21,800
Redemption of limited partnership interests held by our Former Advisor	(200,000)							(291,103)				(291,103)	91,103
Issuance of restricted stock	232					$ 232						232
Issuance of restricted stock (in shares)						232,176
Changes to redeemable common stock	(4,049,066)				4,049,066			(4,049,066)				(4,049,066)
Redemptions of common stock	(211)				(2,052,078)	$ (200)	$ (11)					(211)
Redemptions of common stock (in shares)						(199,883)	(10,242)
Distributions	(8,533,201)								(8,533,201)			(8,533,201)
Distributions for noncontrolling interests	(105,140)												(105,140)
Issuance of shares for distribution reinvestment plan	4,049,444					$ 328	$ 50	4,049,066				4,049,444
Issuance of shares for distribution reinvestment plan (in shares)						328,392	50,757
Stock compensation expense	25,136							25,136				25,136
Net loss attributable to SmartStop Self Storage REIT, Inc.	(2,212,445)									(2,212,445)		(2,212,445)
Net loss attributable to the noncontrolling interests in our Operating Partnership	(71,527)												(71,527)
Foreign currency translation adjustment	1,192,459										1,192,459	1,192,459
Foreign currency forward contract gain (loss)	(1,039,585)										(1,039,585)	(1,039,585)
Interest rate swap and cap contract gains (losses)	(1,861,933)										(1,861,933)	(1,861,933)
Ending Balance at Jun. 30, 2019	381,650,732				36,143,195	$ 51,000	$ 7,602	491,113,855	(111,192,953)	(73,444,156)	(1,613,117)	304,922,231	76,728,501
Ending Balance (in shares) at Jun. 30, 2019						51,000,324	7,602,618
Offering costs	(2,276)							(2,276)				(2,276)
Equity based compensation expense	160,858							160,858				160,858
Issuance of restricted stock	17					$ 17						17
Issuance of restricted stock (in shares)						16,886
Changes to redeemable common stock	(4,046,001)				4,046,001			(4,046,001)				(4,046,001)
Redemptions of common stock	(200)				(349,700)	$ (197)	$ (3)					(200)
Redemptions of common stock (in shares)						(197,470)	(3,546)
Distributions	(8,711,332)								(8,711,332)	(8,711,332)
Distributions for noncontrolling interests	(1,375,462)												(1,375,462)
Issuance of shares for distribution reinvestment plan	4,046,381					$ 329	$ 51	4,046,001				4,046,381
Issuance of shares for distribution reinvestment plan (in shares)						328,801	50,784
Stock compensation expense	160,858							160,858				160,858
Net loss attributable to SmartStop Self Storage REIT, Inc.	(8,214,826)									(8,214,826)		(8,214,826)
Net loss attributable to the noncontrolling interests in our Operating Partnership	(1,326,753)												(1,326,753)
Foreign currency translation adjustment	(651,011)										(651,011)	(651,011)
Foreign currency forward contract gain (loss)	(84,696)										(84,696)	(84,696)
Interest rate swap and cap contract gains (losses)	(823,250)										(823,250)	(823,250)
Ending Balance at Sep. 30, 2019	360,622,181				39,839,496	$ 51,149	$ 7,650	491,272,437	(119,904,285)	(81,658,982)	(3,172,074)	286,595,895	74,026,286
Ending Balance (in shares) at Sep. 30, 2019						51,148,541	7,649,856
Net loss attributable to SmartStop Self Storage REIT, Inc.	(5,431,504)
Ending Balance at Dec. 31, 2019	345,813,823				43,391,362	$ 51,435	$ 7,700	491,433,240	(128,642,787)	(87,090,486)	(1,955,335)	273,803,767	72,010,056				146,426,164
Ending Balance (in shares) at Dec. 31, 2019						51,435,124	7,699,893
Offering costs	(28,822)							(28,822)				(28,822)
Preferred equity issuance costs																	(46,456)
Equity based compensation expense	219,603							219,603				219,603
Issuance of restricted stock	48					$ 47,842						48
Issuance of restricted stock (in shares)						48
Changes to redeemable common stock	(3,979,539)				3,979,539			(3,979,539)				(3,979,539)
Redemptions of common stock	(42)					$ (42,040)						(42)
Redemptions of common stock (in shares)						(42)
Distributions	(8,668,726)								(8,668,726)			(8,668,726)
Distributions for noncontrolling interests	(1,356,799)												(1,356,799)
Issuance of shares for distribution reinvestment plan	3,979,539					$ 322,411	$ 50,046	3,979,167				3,979,539
Issuance of shares for distribution reinvestment plan (in shares)						322	50
Stock compensation expense	219,603							219,603				219,603
Net loss attributable to SmartStop Self Storage REIT, Inc.	(35,073,951)									(35,073,951)		(35,073,951)
Net loss attributable to the noncontrolling interests in our Operating Partnership	(5,031,652)												(5,031,652)
Foreign currency translation adjustment	(4,567,120)										(3,959,904)	(3,959,904)	(607,216)
Foreign currency forward contract gain (loss)	4,566,795										3,959,594	3,959,594	607,201
Interest rate swap and cap contract gains (losses)	(5,475,549)										(4,747,520)	(4,747,520)	(728,029)
Ending Balance at Mar. 31, 2020	290,397,608				47,370,901	$ 51,763,337	$ 7,749,939	491,623,649	(137,311,513)	(122,164,437)	(6,703,165)	225,504,047	64,893,561				146,379,708
Ending Balance (in shares) at Mar. 31, 2020						51,763	7,750
Beginning Balance at Dec. 31, 2019	345,813,823				43,391,362	$ 51,435	$ 7,700	491,433,240	(128,642,787)	(87,090,486)	(1,955,335)	273,803,767	72,010,056				146,426,164
Beginning Balance (in shares) at Dec. 31, 2019						51,435,124	7,699,893
Ending Balance at Jun. 30, 2020	271,955,685				51,374,754	$ 52,118,882	$ 7,801,216	491,870,566	(146,094,279)	(130,655,858)	(6,096,431)	209,083,918	62,871,767				146,379,708
Ending Balance (in shares) at Jun. 30, 2020						52,119	7,801
Beginning Balance at Dec. 31, 2019	345,813,823				43,391,362	$ 51,435	$ 7,700	491,433,240	(128,642,787)	(87,090,486)	(1,955,335)	273,803,767	72,010,056				146,426,164
Beginning Balance (in shares) at Dec. 31, 2019						51,435,124	7,699,893
Net loss attributable to SmartStop Self Storage REIT, Inc.	(49,824,486)
Net loss attributable to the noncontrolling interests in our Operating Partnership	(6,550,455)
Interest rate swap and cap contract gains (losses)	(3,509,682)
Ending Balance at Sep. 30, 2020	256,678,555				54,116,173	$ 52,453,575	$ 7,852,830	492,156,465	(155,013,319)	(136,914,972)	(4,902,696)	195,385,785	61,292,770				146,379,708
Ending Balance (in shares) at Sep. 30, 2020						52,454	7,853
Beginning Balance at Mar. 31, 2020	290,397,608				47,370,901	$ 51,763,337	$ 7,749,939	491,623,649	(137,311,513)	(122,164,437)	(6,703,165)	225,504,047	64,893,561				146,379,708
Beginning Balance (in shares) at Mar. 31, 2020						51,763	7,750
Offering costs	(22)							(22)				(22)
Equity based compensation expense	423,383							247,323				247,323	176,060
Issuance of restricted stock	24					$ 23,725						24
Issuance of restricted stock (in shares)						24
Changes to redeemable common stock	(4,011,353)				4,011,353			(4,011,353)				(4,011,353)
Redemptions of common stock	(1)				(7,500)	$ (750)						(1)
Redemptions of common stock (in shares)						(1)
Distributions	(8,782,766)								(8,782,766)			(8,782,766)
Distributions for noncontrolling interests	(1,356,800)												(1,356,800)
Issuance of shares for distribution reinvestment plan	4,011,353					$ 332,570	$ 51,277	4,010,969				4,011,353
Issuance of shares for distribution reinvestment plan (in shares)						333	51
Stock compensation expense	423,383							247,323				247,323	176,060
Net loss attributable to SmartStop Self Storage REIT, Inc.	(8,491,421)									(8,491,421)		(8,491,421)
Net loss attributable to the noncontrolling interests in our Operating Partnership	(933,443)												(933,443)
Foreign currency translation adjustment	1,959,220										1,700,259	1,700,259	258,961
Foreign currency forward contract gain (loss)	(1,932,451)										(1,677,000)	(1,677,000)	(255,451)
Interest rate swap and cap contract gains (losses)	672,354										583,475	583,475	88,879
Ending Balance at Jun. 30, 2020	271,955,685				51,374,754	$ 52,118,882	$ 7,801,216	491,870,566	(146,094,279)	(130,655,858)	(6,096,431)	209,083,918	62,871,767				146,379,708
Ending Balance (in shares) at Jun. 30, 2020						52,119	7,801
Offering costs	(4,966)							(4,966)				(4,966)
Equity based compensation expense	523,031							291,252				291,252	231,779
Changes to redeemable common stock	(4,011,063)				4,011,063			(4,011,063)				(4,011,063)
Redemptions of common stock					(1,269,644)
Distributions	(8,919,040)								(8,919,040)			(8,919,040)
Distributions for noncontrolling interests	(1,406,034)												(1,406,034)
Issuance of shares for distribution reinvestment plan	4,011,063					$ 334,693	$ 51,614	4,010,676				4,011,063
Issuance of shares for distribution reinvestment plan (in shares)						335	52
Stock compensation expense	523,031							291,252				291,252	231,779
Net loss attributable to SmartStop Self Storage REIT, Inc.	(6,259,114)									(6,259,114)		(6,259,114)
Net loss attributable to the noncontrolling interests in our Operating Partnership	(585,360)												(585,360)
Foreign currency translation adjustment	1,069,449										928,902	928,902	140,547
Foreign currency forward contract gain (loss)	(988,609)										(858,687)	(858,687)	(129,922)
Interest rate swap and cap contract gains (losses)	1,293,513										1,123,520	1,123,520	169,993
Ending Balance at Sep. 30, 2020	$ 256,678,555				$ 54,116,173	$ 52,453,575	$ 7,852,830	$ 492,156,465	$ (155,013,319)	$ (136,914,972)	$ (4,902,696)	$ 195,385,785	$ 61,292,770				$ 146,379,708
Ending Balance (in shares) at Sep. 30, 2020						52,454	7,853

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net loss	$ (49,262,919)	$ (20,773,868)	$ (25,095,538)	$ (3,720,730)	$ (14,986,290)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	32,038,383	29,750,462	41,098,672	22,802,691	33,452,073
Change in deferred tax liability	(3,299,330)	(409,649)	(806,083)
Accretion of fair market value adjustment of secured debt	(98,337)	(98,850)	(131,611)	(413,353)	(340,382)
Amortization of debt issuance costs	2,832,240	2,997,801	3,996,676	1,582,049	1,424,790
Equity based compensation expense	1,166,017	208,496	404,540	75,293	33,971
Contingent earnout expense	(5,100,000)	300,000	200,000
Impairment of goodwill and intangible assets	36,465,732	0
Impairment of investments in Managed REITs	4,376,879	0
Unrealized foreign currency and derivative (gains) losses	163,216	(630,864)	(797,999)	151,777	(288,603)
Net loss on extinguishment of debt	0	1,487,867	2,647,633	0	0
Gain resulting from acquisition of unconsolidated affiliates		(8,017,353)	(8,017,353)
Gain on sale of real estate			(3,944,696)
Increase (decrease) in cash from changes in assets and liabilities:
Other assets, net	558,553	(363,480)	(835,114)	(1,237,429)	(1,421,813)
Accounts payable and accrued liabilities	3,077,198	4,410,733	1,576,029	(794,156)	1,721,910
Managed REITs receivables	(48,302)	33,685	(122,629)
Due to affiliates	(320,134)	(752,631)	(405,505)	(87,017)	339,357
Net cash provided by operating activities	22,549,196	8,142,349	9,767,022	18,359,125	19,935,013
Cash flows from investing activities:
SSGT Mergers, net of cash acquired	(345,538,595)		(345,538,595)
Self Administration Transaction, net of cash acquired		(3,292,958)	(3,292,958)
Purchase of real estate	(612,892)	(9,435,343)	(9,435,343)		(49,432,644)
Additions to real estate	(11,761,393)	(7,993,081)	(12,291,574)	(1,952,738)	(4,165,926)
Deposits on acquisition of real estate facilities	(148,367)	(200,000)	(200,000)
Investment in real estate joint ventures				(3,358,814)
Net proceeds from the sale of real estate			15,721,610
Settlement of foreign currency hedges	398,951	1,064,287	918,558	2,132,261	(3,947,758)
Purchase of foreign currency hedge		(147,347)	(147,347)
Settlement of company owned life insurance		3,122,962	3,122,962
Proceeds from sale of real estate joint venture		3,357,814	3,358,814
Net cash used in investing activities	(18,558,701)	(359,062,261)	(347,783,873)	(3,179,291)	(57,546,328)
Cash flows from financing activities:
Distributions paid to preferred stockholders	(6,305,722)
Issuance costs	(519,456)	(509,512)	(3,573,836)
Gross proceeds from issuance of debt	338,466	531,334,779	535,852,363	91,229,806	166,186,951
Repayment of debt		(141,088,724)	(251,732,077)	(72,513,082)	(130,671,050)
Scheduled principal payments on debt	(516,897)	(566,816)	(802,789)	(1,892,622)	(1,564,587)
Debt issuance costs	(4,494)	(8,514,829)	(8,531,362)	(1,892,495)	(548,206)
Prepaid debt issuance costs				(1,075,000)
Debt defeasance costs		(1,690,703)	(1,690,703)
Gross proceeds from issuance of common stock					18,879,477
Common stock offering costs			(709,842)	(693,971)	(2,339,113)
Gross proceeds from issuance of preferred stock			150,000,000
Redemption of common stock	(438,783)	(5,331,329)	(5,740,677)	(7,758,830)	(1,741,113)
Distributions paid to common stockholders	(14,311,105)	(13,607,658)	(18,207,418)	(17,566,799)	(16,671,024)
Redemption of noncontrolling interest		(200,000)	(200,000)	(125,000)
Distributions paid to noncontrolling interests in our Operating Partnership	(4,124,617)	(1,079,696)	(2,440,247)	(253,480)	(252,671)
Net cash provided by (used in) financing activities	(25,929,065)	358,745,512	392,223,412	(12,541,473)	31,278,664
Impact of foreign exchange rate changes on cash and cash equivalents and restricted cash	(98,343)	96,122	352,354	(494,565)	166,258
Change in cash, cash equivalents, and restricted cash	(22,036,913)	7,921,722	54,558,915	2,143,796	(6,166,393)
Cash, cash equivalents, and restricted cash beginning of period	68,571,123	14,012,208	14,012,208	11,868,412	18,034,805
Cash, cash equivalents, and restricted cash end of period	46,534,210	21,933,930	68,571,123	14,012,208	11,868,412
Supplemental disclosures and non-cash transactions:
Cash paid for interest	25,021,817	26,457,563	35,942,900	17,976,018	15,994,203
Supplemental disclosure of noncash activities:
Write-off of unamortized debt issuance costs		356,519
Additions to real estate and construction in process included in accounts payable	250,172	864,237
Issuance of shares pursuant to distribution reinvestment plan	12,001,955	12,059,591	16,046,534	16,057,113	16,006,277
Distributions payable	6,017,893	3,326,601	5,159,105	2,890,395	2,852,100
Redemption of common stock included in accounts payable and accrued liabilities	1,269,644	405,971	431,326	1,291,520	723,733
Deposit applied to the purchase of real estate	200,000		1,000,000		250,000
Real estate and construction in process included in accounts payable and accrued liabilities			1,420,217	617,667	165,806
Issuance of units in our Operating Partnership		18,800,000
Debt assumed in SSGT Mergers		5,038,435	5,038,435
Net liabilities assumed in SSGT Mergers		1,712,596	1,712,596
Debt assumed in the Self Administration Transaction		19,219,126	19,219,126
Contingent earnout consideration issued in the Self Administration Transaction			30,900,000
Deferred tax liabilities related to the Self Administration Transaction		7,415,654	7,415,654
Accounts payable and other accrued liabilities assumed in the Self Administration Transaction		722,286	722,286
Transfer of other assets to debt issuance costs		1,075,000	1,075,000
Foreign currency contracts, interest rate swaps, and interest rate cap contract in accounts payable and accrued liabilities and other assets			3,575,580	2,774,111	76,955
Issuance of common stock in exchange for units in our Operating Partnership				$ 4,254,009
Debt and accrued liabilities assumed during purchase of real estate					39,967,787
Offering costs included in accounts payable and accrued liabilities					1,410
Offering costs included in due to affiliates					299,299
SSGT Mergers
Supplemental disclosure of noncash activities:
Issuance of units in our Operating Partnership		4,217,399	4,217,399
Self Administration Transaction
Supplemental disclosure of noncash activities:
Issuance of units in our Operating Partnership		63,643,000	63,643,000
Real Estate Facilities
Supplemental disclosure of noncash activities:
Issuance of units in our Operating Partnership					$ 4,875,454
Limited Partner
Supplemental disclosure of noncash activities:
Issuance of units in our Operating Partnership			$ 18,800,000
Contingent earnout consideration issued in the Self Administration Transaction		$ 30,900,000
Preferred Stock
Cash flows from investing activities:
Preferred equity investment in SSGT II	(6,435,000)
Cash flows from financing activities:
Issuance costs	$ (46,457)

Organization

Organization	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Organization	Note 1. Organization SmartStop Self Storage REIT, Inc, a Maryland corporation (the “Company”), is a self-managed and fully-integrated self storage real estate investment trust (“REIT”), formed on January 8, 2013, under the Maryland General Corporation Law. The Company’s year-end On June 28, 2019, we acquired the self storage advisory, asset management and property management businesses and certain joint venture interests (the “Self Storage Platform”) of SmartStop Asset Management, LLC, our former sponsor (“SAM”), along with certain other assets of SAM (collectively, the “Self Administration Transaction”). As a result of the Self Administration Transaction, SAM is no longer our sponsor, and the special limited partnership interest and limited partnership interests it held in SmartStop OP, L.P. (our “Operating Partnership”) through our Former External Advisor (defined below) have been redeemed. We are self-managed and succeed to the advisory, asset management and property management businesses and certain joint ventures previously in place for us, Strategic Storage Trust IV, Inc. (“SST IV”), a public non-traded non-traded Prior to the Self Administration Transaction, our Former External Advisor was responsible for managing our affairs on a day-to-day Potential SST IV Merger On November 10, 2020, the Company, SST IV, and SST IV Merger Sub, LLC, a Maryland limited liability company and a wholly-owned subsidiary of the Company (“SST IV Merger Sub”), entered into a definitive Agreement and Plan of Merger (the “SST IV Merger Agreement”). Pursuant to the SST IV Merger Agreement, the Company will acquire SST IV by way of a merger of SST IV with and into SST IV Merger Sub, with SST IV Merger Sub being the surviving entity (the “SST IV Merger”). The SST IV Merger is expected to close during the first half of 2021. Assuming all of the conditions of the SST IV Merger are satisfied and the SST IV Merger is consummated in accordance with the terms in the SST IV Merger Agreement, the Company will acquire all of the real estate owned by SST IV, consisting of (i) 24 self storage facilities located in 9 states comprising approximately 18,000 self storage units and approximately 2.0 million net rentable square feet, and (ii) SST IV’s 50% equity interest in five unconsolidated real estate ventures located in the Greater Toronto Area of Ontario, Canada (the “JV Properties”). See Note 16 - Subsequent Events, for additional information related to the SST IV Merger. Offering Related Our Articles of Amendment and Restatement, as amended and supplemented, authorize 350,000,000 shares of Class A common stock, $0.001 par value per share (the “Class A Shares”), and 350,000,000 shares of Class T common stock, $0.001 par value per share (the “Class T Shares”), and 200,000,000 shares of preferred stock with a par value of $0.001, 200,000 shares of which have been classified as Series A Convertible Preferred Stock. We offered a maximum of $1.0 billion in common shares for sale to the public (the “Primary Offering”) and $95.0 million in common shares for sale pursuant to our distribution reinvestment plan (collectively, the “Offering”). On January 10, 2014, the Securities and Exchange Commission (“SEC”) declared our registration statement effective. On May 23, 2014, we satisfied the $1.5 million minimum offering requirements of our Offering and commenced formal operations. On January 9, 2017, our Offering terminated. We sold approximately 48 million Class A Shares and approximately 7 million Class T Shares for approximately $493 million and $73 million respectively, in our Offering. On November 30, 2016, prior to the termination of our Offering, we filed with the SEC a Registration Statement on Form S-3, On October 29, 2019 (the “Commitment Date”), we entered into a preferred stock purchase agreement (the “Purchase Agreement”) with Extra Space Storage LP (the “Investor”), a subsidiary of Extra Space Storage Inc. (NYSE: EXR), pursuant to which the Investor committed to purchase up to $200 million in shares (the aggregate shares to be purchased, the “Preferred Shares”) of our Series A Convertible Preferred Stock (the “Series A Convertible Preferred Stock”), in one or more closings (each, a “Closing,” and collectively, the “Closings”). The initial closing (the “Initial Closing”) in the amount of $150 million occurred on the Commitment Date, and the second and final closing in the amount of $50 million occurred on October 26, 2020. See Note 16 - Subsequent Events, for additional information. The shares of Series A Convertible Preferred Stock rank senior to all other shares of our capital stock, including our common stock, with respect to rights to receive dividends and to participate in distributions or payments upon any voluntary or involuntary liquidation, dissolution or winding up of the Company. Dividends payable on each share of Series A Convertible Preferred Stock will initially be equal to a rate of 6.25% per annum. If the Series A Convertible Preferred Stock has not been redeemed on or prior to the fifth anniversary date of the Initial Closing, the dividend rate will increase an additional 0.75% per annum each year thereafter to a maximum of 9.0% per annum until the tenth anniversary of the Initial Closing, at which time the dividend rate shall increase 0.75% per annum each year thereafter until the Series A Convertible Preferred Stock is redeemed or repurchased in full. See Note 8, Preferred Equity, for additional information. As of September 30, 2020, we owned 112 self storage facilities located in 17 states (Alabama, Arizona, California, Colorado, Florida, Illinois, Indiana, Maryland, Massachusetts, Michigan, New Jersey, Nevada, North Carolina, Ohio, South Carolina, Texas and Washington) and Canada (the Greater Toronto Area). On April 20, 2020, our board of directors, upon recommendation of our Nominating and Corporate Governance Committee, approved an estimated value per share of our common stock of $10.40 for our Class A Shares and Class T Shares based on the estimated value of our assets less the estimated value of our liabilities, or net asset value, divided by the number of shares outstanding on a fully diluted basis, calculated as of December 31, 2019. As a result of the calculation of our estimated value per share, beginning in May 2020, shares sold pursuant to our distribution reinvestment plan are being sold at the estimated value per share of $10.40 for both Class A Shares and Class T Shares. Prior to the termination of our Primary Offering, Select Capital Corporation, a California corporation (our “Former Dealer Manager”), was responsible for marketing our shares offered pursuant to our Primary Offering. SAM indirectly owns a 15% non-voting Other Corporate History Our Operating Partnership was formed on January 9, 2013. During 2013, our Former External Advisor purchased limited partnership interests in our Operating Partnership for $200,000 and on August 2, 2013, we contributed the initial $1,000 capital contribution we received to our Operating Partnership in exchange for the general partner interest. See Note 4, Self Administration Transaction, for additional information. As we accepted subscriptions for shares of our common stock, we transferred all of the net Offering proceeds to our Operating Partnership as capital contributions in exchange for additional units of interest in our Operating Partnership. However, we were deemed to have made capital contributions in the amount of gross proceeds received from investors, and our Operating Partnership was deemed to have simultaneously paid the sales commissions and other costs associated with the Offering. In addition, our Operating Partnership is structured to make distributions with respect to limited partnership units that are equivalent to the distributions made to holders of common stock. Finally, a limited partner in our Operating Partnership may later exchange his or her limited partnership units in our Operating Partnership for shares of our common stock at any time after one year following the date of issuance of their limited partnership units, subject to certain restrictions outlined in our Operating Partnership’s limited partnership agreement. Our Operating Partnership owns, directly or indirectly through one or more special purpose entities, all of the self storage properties that we own. As of September 30, 2020, we owned approximately 86.5% of the common units of limited partnership interests of our Operating Partnership. The remaining approximately 13.5% of the common units are owned indirectly by SAM and affiliates of our Former Dealer Manager. As the sole general partner of our Operating Partnership, we have the exclusive power to manage and conduct the business of our Operating Partnership. We conduct certain activities through SmartStop TRS, Inc. (our “TRS”), which is a wholly-owned subsidiary of our Operating Partnership. On October 1, 2018, we, our Operating Partnership, and SST II Growth Acquisition, LLC, our wholly-owned subsidiary (“Merger Sub”), entered into an Agreement and Plan of Merger (the “SSGT Merger Agreement”) with Strategic Storage Growth Trust, Inc. (“SSGT”), a non-traded lease-up COVID-19 The global economy has continued to be adversely impacted by the COVID-19 COVID-19 governmental orders or broad economic weakness could adversely impact our business, financial condition, liquidity and results of operations, however, the extent and duration to which our operations will be impacted is highly uncertain and cannot be predicted.	Note 1. Organization SmartStop Self Storage REIT, Inc. (f/k/a Strategic Storage Trust II, Inc.), a Maryland corporation (the “Company”), is a self-managed and fully-integrated self storage real estate investment trust (“REIT”), formed on January 8, 2013 under the Maryland General Corporation Law. The Company’s year-end Recent Developments On June 28, 2019, we and our operating partnership, SmartStop OP, L.P. (f/k/a Strategic Storage Operating Partnership II, L.P.) (our “Operating Partnership”), and SmartStop TRS, Inc. (f/k/a Strategic Storage TRS II, Inc.) (the “TRS”) entered into a series of transactions, agreements, and amendments to our existing agreements and arrangements (such agreements and amendments hereinafter referred to collectively as the “Self Administration Transaction”), with SmartStop Asset Management LLC, our former sponsor (“SAM”) and SmartStop OP Holdings, LLC (“SS OP Holdings”), a subsidiary of SAM, pursuant to which, effective June 28, 2019, we acquired the self storage advisory, asset management and property management businesses and certain joint venture interests of SAM (the “Self Storage Platform”), along with certain other assets of SAM. As a result of the Self Administration Transaction, SAM is no longer our sponsor, and the special limited partnership interest and limited partnership interest it held in our Operating Partnership through our Former External Advisor (defined below) have been redeemed. Additionally, we are now self-managed and succeed to the advisory, asset management and property management businesses and certain joint ventures previously in place for us, Strategic Storage Trust IV, Inc. (“SST IV”), a public non-traded non-traded . Prior to the Self Administration Transaction, our Former External Advisor was responsible for managing our affairs on a day-to-day Offering Related Our Articles of Amendment and Restatement, as amended and supplemented, authorize 350,000,000 shares of Class A common stock, $0.001 par value per share (the “Class A Shares”) and 350,000,000 shares of Class T common stock, $0.001 par value per share (the “Class T Shares”) and 200,000,000 shares of preferred stock with a par value of $0.001. We offered a maximum of $1.0 billion in common shares for sale to the public (the “Primary Offering”) and $95.0 million in common shares for sale pursuant to our distribution reinvestment plan (collectively, the “Offering”). On January 10, 2014, the Securities and Exchange Commission (“SEC”) declared our registration statement effective. On May 23, 2014, we satisfied the $1.5 million minimum offering requirements of our Offering and S-3, On October 29, 2019 (the “Commitment Date”), we entered into a preferred stock purchase agreement (the “Purchase Agreement”) with Extra Space Storage LP (the “Investor”), a subsidiary of Extra Space Storage Inc. (NYSE: EXR), pursuant to which the Investor committed to purchase up to $200 million in shares (the aggregate shares to be purchased, the “Preferred Shares”) of our new Series A Convertible Preferred Stock (the “Series A Convertible Preferred Stock”), in one or more closings (each, a “Closing,” and collectively, the “Closings”). The initial closing (the “Initial Closing”) in the amount of $150 million occurred on the Commitment Date. The Investor has committed to purchase up to an additional $50 million, at our option, within 12 months following the Initial Closing, subject to certain limitations. The shares of Series A Convertible Preferred Stock rank senior to all other shares our capital stock, including our common stock, with respect to rights to receive dividends and to participate in distributions or payments upon any voluntary or involuntary liquidation, dissolution or winding up of the Company. Dividends payable on each share of Series A Convertible Preferred Stock will initially be equal to a rate of 6.25% per annum. If the Series A Convertible Preferred Stock has not been redeemed on or prior to the fifth anniversary date of the Initial Closing, the dividend rate will increase an additional 0.75% per annum each year thereafter to a maximum of 9.0% per annum until the tenth anniversary of the Initial Closing, at which time the dividend rate shall increase 0.75% per annum each year thereafter until the Series A Convertible Preferred Stock is redeemed or repurchased in full. See Note 7, Preferred Equity, for additional information. We invested the net proceeds from our Offering primarily in self storage facilities. As of December 31, 2019, we owned 112 self storage facilities located in 17 states (Alabama, Arizona, California, Colorado, Florida, Illinois, Indiana, Maryland, Massachusetts, Michigan, New Jersey, Nevada, North Carolina, Ohio, South Carolina, Texas and Washington) and Canada (the Greater Toronto Area). On June 26, 2019, our board of directors, upon recommendation of our Nominating and Corporate Governance Committee, approved an estimated value per share of our common stock of $10.66 for our Class A Shares and Class T Shares based on the estimated value of our assets less the estimated value of our liabilities, or net asset value, divided by the number of shares outstanding on a fully diluted basis, calculated as of March 31, 2019. As a result of the calculation of our estimated value per share, beginning in June 2019, shares sold pursuant to our distribution reinvestment plan are being sold at the estimated value per share of $10.66 for both Class A Shares and Class T Shares. Prior to the termination of our Primary Offering, Select Capital Corporation, a California corporation (our “Dealer Manager”) was responsible for marketing our shares offered pursuant to our Primary Offering. SAM indirectly owns a 15% non-voting an ongoing stockholder servicing fee with respect to the Class T Shares sold. Please see Note 10 – Related Party Transactions – Dealer Manager Agreement. Other Corporate History Our Operating Partnership was formed on January 9, 2013. During 2013, our Former External Advisor purchased limited partnership interests in our Operating Partnership for $200,000 and on August 2, 2013, we contributed the initial $1,000 capital contribution we received to our Operating Partnership in exchange for the general partner interest. As we accepted subscriptions for shares of our common stock, we transferred all of the net Offering proceeds to our Operating Partnership as capital contributions in exchange for additional units of interest in our Operating Partnership. However, we were deemed to have made capital contributions in the amount of gross proceeds received from investors, and our Operating Partnership was deemed to have simultaneously paid the sales commissions and other costs associated with the Offering. In addition, our Operating Partnership is structured to make distributions with respect to limited partnership units that are equivalent to the distributions made to holders of common stock. Finally, a limited partner in our Operating Partnership may later exchange his or her limited partnership units in our Operating Partnership for shares of our common stock at any time after one year following the date of issuance of their limited partnership units, subject to certain restrictions outlined in our Operating Partnership’s limited partnership agreement. Our Operating Partnership owns, directly or indirectly through one or more special purpose entities, all of the self storage properties that we acquire. As of December 31, 2019, we owned approximately 86.7% of the common units of limited partnership interests of our Operating Partnership. The remaining approximately 13.3% of the common units are owned indirectly by SAM and affiliates of our Dealer Manager. As the sole general partner of our Operating Partnership, we have the exclusive power to manage and conduct the business of our Operating Partnership. We conduct certain activities through our TRS, which is a wholly-owned subsidiary of our Operating Partnership. On October 1, 2018, we, our Operating Partnership, and SST II Growth Acquisition, LLC, our wholly-owned subsidiary (“Merger Sub”), entered into an Agreement and Plan of Merger (the “SSGT Merger Agreement”) with Strategic Storage Growth Trust, Inc. (“SSGT”), a non-traded lease-up

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Note 2. Summary of Significant Accounting Policies Basis of Presentation The accompanying consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) as contained within the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) and the rules and regulations of the SEC. Principles of Consolidation Our financial statements, and the financial statements of our Operating Partnership, including its wholly-owned subsidiaries, are consolidated in the accompanying consolidated financial statements. The portion of these entities not wholly-owned by us is presented as noncontrolling interests. All significant intercompany accounts and transactions have been eliminated in consolidation. Consolidation Considerations Current accounting guidance provides a framework for identifying a variable interest entity (“VIE”) and determining when a company should include the assets, liabilities, noncontrolling interests, and results of activities of a VIE in its consolidated financial statements. In general, a VIE is an entity or other legal structure used to conduct activities or hold assets that either (1) has an insufficient amount of equity to carry out its principal activities without additional subordinated financial support, (2) has a group of equity owners that are unable to make significant decisions about its activities, or (3) has a group of equity owners that do not have the obligation to absorb losses or the right to receive returns generated by its operations. Generally, a VIE should be consolidated if a party with an ownership, contractual, or other financial interest in the VIE (a variable interest holder) has the power to direct the VIE’s most significant activities and the obligation to absorb losses or right to receive benefits of the VIE that could be significant to the VIE. A variable interest holder that consolidates the VIE is called the primary beneficiary. Upon consolidation, the primary beneficiary generally must initially record all of the VIE’s assets, liabilities, and noncontrolling interest at fair value and subsequently account for the VIE as if it were consolidated based on majority voting interest. Our Operating Partnership is deemed to be a VIE and is consolidated by the Company as the primary beneficiary. As of September 30, 2020, and December 31, 2019, we were not a party to any other contracts/interests that would be deemed to be variable interest in VIEs other than our Tenant Programs joint ventures with SST IV and SSGT II which were acquired in the Self Administration Transaction, which are consolidated. Equity Investments Under the equity method, our investments will be stated at cost and adjusted for our share of net earnings or losses and reduced by distributions and impairments, as applicable. Equity in earnings will generally be recognized based on our ownership interest in the earnings of each of the unconsolidated investments. Investments in and Advances to Managed REITs As of September 30, 2020, and December 31, 2019, we owned equity investments with a carrying value of approximately $7.9 million, and $5.8 million, respectively, in the Managed REITs; such amounts are included in Investments in and advances to Managed REITs within our Consolidated Balance Sheets. We account for these investments using the equity method of accounting as we have the ability to exercise significant influence, but not control, over the Managed REITs’ operating and financial policies through our advisory and property management agreements with the respective Managed REITs. The equity method of accounting requires the investment to be initially recorded at cost and subsequently adjusted for our share of equity in the respective Managed REIT’s earnings and reduced by distributions. Also included in Investments in and advances to Managed REITs as of September 30, 2020 are receivables from the Managed REITs of approximately $320,000. As of December 31, 2019, receivables from the Managed REITs approximated $275,000. For additional discussion, Note 11 – Related Party Transactions. Noncontrolling Interests in Consolidated Entities We account for the noncontrolling interests in our Operating Partnership and the noncontrolling interests in our Tenant Programs joint ventures with SST IV and SSGT II in accordance with the related accounting guidance. Due to our control through our general partnership interest in our Operating Partnership and the limited rights of the limited partners, our Operating Partnership, including its wholly-owned subsidiaries, are consolidated with the Company and the limited partner interests are reflected as a noncontrolling interests in the accompanying consolidated balance sheets. We also consolidate our interests in the SST IV and SSGT II Tenant Programs and present the minority interests as noncontrolling interests in the accompanying consolidated balance sheets. The noncontrolling interests shall be attributed their share of income and losses, even if that attribution results in a deficit noncontrolling interests balance. Use of Estimates The preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. The current economic environment has increased the degree of uncertainty inherent in these estimates and assumptions. Management will adjust such estimates when facts and circumstances dictate. Actual results could materially differ from those estimates. The most significant estimates made include the allocation of property purchase price to tangible and intangible assets acquired and liabilities assumed at relative fair value, the determination if certain entities should be consolidated, the evaluation of potential impairment of indefinite and long-lived assets and goodwill, and the estimated useful lives of real estate assets and intangibles. Cash and Cash Equivalents We consider all short-term, highly liquid investments that are readily convertible to cash with a maturity of three months or less at the time of purchase to be cash equivalents. We may maintain cash and cash equivalents in financial institutions in excess of insured limits, but believe this risk will be mitigated by only investing in or through major financial institutions. Restricted Cash Restricted cash consists primarily of impound reserve accounts for property taxes, insurance and capital improvements in connection with the requirements of certain of our loan agreements. Real Estate Purchase Price Allocation We account for acquisitions in accordance with GAAP which requires that we allocate the purchase price of a property to the tangible and intangible assets acquired and the liabilities assumed based on their relative fair values as of the date of acquisition. This guidance requires us to make significant estimates and assumptions, including fair value estimates, which requires the use of significant unobservable inputs as of the acquisition date. The value of the tangible assets, consisting of land and buildings, is determined as if vacant. Substantially all of the leases in place at acquired properties are at market rates, as the majority of the leases are month-to-month contracts. whether in-place, market in-place Allocation of purchase price to acquisitions of portfolios of facilities are allocated to the individual facilities based upon an income approach or a cash flow analysis using appropriate risk adjusted capitalization rates which take into account the relative size, age, and location of the individual facility along with current and projected occupancy and rental rate levels or appraised values, if available. Acquisitions that do not meet the definition of a business, as defined under current GAAP, are accounted for as asset acquisitions. During the nine months ended September 30, 2020 and 2019, our property acquisitions did not meet the definition of a business because substantially all of the fair value was concentrated in a single identifiable asset or group of similar identifiable assets (i.e. land, buildings, and related intangible assets) or because the acquisitions did not include a substantive process in the form of an acquired workforce or an acquired contract that cannot be replaced without significant cost, effort or delay. As a result, once an acquisition is deemed probable, transaction costs are capitalized rather than expensed. During the three months ended September 30, 2020 and 2019, we expensed approximately $470,000 and $26,000, respectively, of acquisition-related transaction costs that did not meet our capitalization policy during the respective periods. During the nine months ended September 30, 2020 and 2019, we expensed approximately $594,000 and $194,000, respectively, of acquisition-related transaction costs that did not meet our capitalization policy during the respective periods. Purchase Price Allocation for the Acquisition of a Business Should the initial accounting for an acquisition that meets the definition of a business be incomplete by the end of a reporting period that falls within the measurement period, we report provisional amounts in our financial statements. During the measurement period, we may adjust the provisional amounts recognized at the acquisition date to reflect new information obtained about facts and circumstances that existed as of the acquisition date that, if known, would have affected the measurement of the amounts recognized as of that date and we record those adjustments to our financial statements. We apply any measurement period adjustments in the period in which the provisional amounts are finalized. As discussed in Note 4, the Self Administration Transaction was an acquisition of a business. Evaluation of Possible Impairment of Real Property Assets Management monitors events and changes in circumstances that could indicate that the carrying amounts of our real property assets may not be recoverable. When indicators of potential impairment are present that indicate that the carrying amounts of the assets may not be recoverable, we will assess the recoverability of the assets by determining whether the carrying value of the real property assets will be recovered through the undiscounted future operating cash flows expected from the use of the asset and its eventual disposition. In the event that such expected undiscounted future cash flows do not exceed the carrying value, we will adjust the value of the real property assets to the fair value and recognize an impairment loss. For the three and nine months ended September 30, 2020 and 2019, no impairment losses related to our real property assets were recognized. Goodwill Valuation We initially recorded goodwill of approximately $78.4 million as a result of the Self Administration Transaction. Goodwill is recorded as the difference, if any, between the aggregate consideration paid for an acquisition and the fair value of the net tangible assets and other intangible assets acquired. Goodwill is allocated to various reporting units, as applicable, and is not amortized. We perform an annual impairment test for goodwill, and between annual tests, we evaluate the recoverability of goodwill whenever events or changes in circumstances indicate that the carrying amount of goodwill may not be fully recoverable. In our impairment test of goodwill, we perform a quantitative analysis to compare the fair value of each reporting unit to its respective carrying amount. If the carrying amount of goodwill exceeds its fair value, an impairment charge will be recognized. See Note 5 - Self Administration Transaction - Intangibles, Goodwill, and Certain Other Assets and Liabilities for additional information. Trademarks In connection with the Self Administration Transaction, we initially recorded $19.8 million associated with the two primary trademarks acquired. Prior thereto we had no amounts recorded related to trademarks. Trademarks are based on the value of our brands. Trademarks are valued using the relief from royalty method, which presumes that without ownership of such trademarks, we would have to make a stream of payments to a brand or franchise owner in return for the right to use their name. By virtue of this asset, we avoid any such payments and record the related intangible fair value of our ownership of the brand name. We used the following significant projections and assumptions to determine fair value under the relief from royalty method: revenues; royalty rate; tax expense; terminal growth rate; and discount rate. For the SmartStop ® ® after-tax after-tax after-tax 15-year The total estimated future amortization expense of the “Strategic Storage ® We evaluate whether any triggering events or changes in circumstances have occurred subsequent to our annual impairment test that would indicate an impairment condition may exist. If any change in circumstance or triggering event occurs, and results in a significant impact to our revenue and profitability projections, or any significant assumption in our valuation methods is adversely impacted, the impact could result in a material impairment charge in the future. See Note 5 - Self Administration Transaction - Intangibles, Goodwill, and Certain Other Assets and Liabilities for additional information. Revenue Recognition Self Storage Operations Management believes that all of our leases are operating leases. Rental income is recognized in accordance with the terms of the leases, which generally are month-to-month. Managed REIT Platform We earn property management and asset management revenue, pursuant to the respective property management and advisory agreement contracts, in connection with providing services to the Managed REITs. We have determined under ASC 606 – Revenue from Contracts with Customers (“ASC 606”), that the performance obligation for the property management services and asset management services are satisfied as the services are rendered. While we are compensated for our services on a monthly basis, these services represent a series of distinct daily services in accordance with ASC 606. Such revenue is recorded in the Managed REIT Platform revenue line within our consolidated statements of operations. The Managed REITs’ advisory agreements also provide for reimbursement to us of our direct and indirect costs of providing administrative and management services to the Managed REITs. These reimbursements include costs incurred in relation to organization and offering services provided to the Managed REITs and the reimbursement of salaries, bonuses, and other expenses related to benefits paid to our employees while performing services for the Managed REITs. The Managed REITs’ property management agreements also provide reimbursement to us for the property manager’s costs of managing the properties. Reimbursable costs include wages and salaries and other expenses that arise in operating, managing and maintaining the Managed REITs’ properties. Under ASC 606, direct reimbursement of such costs does not represent a separate performance obligation from our obligation to perform property management and asset management services. The reimbursement income is considered variable consideration, and is recognized as the costs are incurred, subject to limitations on the Managed REIT Platform’s ability to incur offering costs or limitations imposed by the advisory agreements. We have elected to separately record such revenue in the Reimbursable costs from Managed REITs line within our consolidated statements of operations. Additionally, we earn revenue in connection with our Tenant Programs joint ventures with our Managed REITs. We also earn development and construction management revenue from services we provide in connection with the project design, coordination and oversite of development and certain capital improvement projects undertaken by the Managed REITs. We recognize such revenue in the Managed REIT Platform revenue line within our consolidated statements of operations. See Note 11 – Related Party Transactions, for additional information regarding revenue generated from our Managed REIT Platform. Allowance for Doubtful Accounts Tenant accounts receivable is reported net of an allowance for doubtful accounts. Management records a general reserve estimate based upon a review of the current status of tenant accounts receivable. It is reasonably possible that management’s estimate of the allowance will change in the future. Real Estate Facilities We capitalize costs incurred to develop, construct, renovate and improve properties, including interest and property taxes incurred during the construction period. The construction period begins when expenditures for the real estate assets have been made and activities that are necessary to prepare the asset for its intended use are in progress. The construction period ends when the asset is substantially complete and ready for its intended use. Depreciation of Real Property Assets Our management is required to make subjective assessments as to the useful lives of our depreciable assets. We consider the period of future benefit of the asset to determine the appropriate useful lives. Depreciation of our real property assets is charged to expense on a straight-line basis over the estimated useful lives as follows: Description Standard Depreciable Life Land Not Depreciated Buildings 30-40 Site Improvements 7-10 Depreciation of Personal Property Assets Personal property assets consist primarily of furniture, fixtures and equipment and are depreciated on a straight-line basis over the estimated useful lives, generally ranging from 3 to 5 years, and are included in other assets on our consolidated balance sheets. Intangible Assets We have allocated a portion of our real estate purchase price to in-place in-place in-place in-place in-place in-place The total estimated future amortization expense of intangible assets related to our self storage properties for the years ending December 31, 2020, 2021, 2022, 2023, 2024, and thereafter is approximately $25,000, $0.1 million, $0.1 million, $0.1 million, $0.1 million, and $1.0 million, respectively. In connection with the Self Administration Transaction, we allocated a portion of the consideration to the contracts that we acquired related to the Managed REITs and the customer relationships related to the Tenant Programs joint ventures. For these intangibles, we are amortizing such amounts on a straight-line basis over the estimated benefit period of the contracts and customer relationships. As of September 30, 2020, the gross amount of the intangible assets related to the Managed REITs contracts and the customer relationships related to the Tenant Programs joint ventures was approximately $18.1 million and accumulated amortization of those intangibles totaled approximately $6.3 million. As of December 31, 2019, the gross amount of the intangibles related to the Managed REITs contracts and the customer relationships related to the Tenant Programs joint ventures was approximately $26.5 million and accumulated amortization of those intangibles totaled approximately $2.9 million. The total estimated future amortization expense for such intangible assets for the years ending December 31, 2020, 2021, 2022, 2023, 2024 and thereafter is approximately $1.0 million, $2.9 million, $2.9 million, $2.9 million, $1.8 million, and $0.3 million, respectively. We evaluate whether any triggering events or changes in circumstances have occurred subsequent to our annual impairment test that would indicate an impairment condition may exist. If any change in circumstance or triggering event occurs, and results in a significant impact to our revenue and profitability projections, or any significant assumption in our valuations methods is adversely impacted, the impact could result in a material impairment charge in the future. See Note 5 - Self Administration Transaction - Intangibles, Goodwill, and Certain Other Assets and Liabilities for additional information. Debt Issuance Costs The net carrying value of costs incurred in connection with obtaining non revolving debt are presented on the balance sheet as a deduction from debt (see Note 7). Debt issuance costs are amortized on a straight-line basis over the term of the related loan, which is not materially different than the effective interest method. As of September 30, 2020, the gross amount allocated to debt issuance costs related to non-revolving non-revolving non-revolving non-revolving Organizational and Offering Costs We pay our Former Dealer Manager an ongoing stockholder servicing fee that is payable monthly and accrues daily in an amount equal to 1/365th of 1% of the purchase price per share of the Class T Shares sold in the Primary Offering. We will cease paying the stockholder servicing fee with respect to the Class T Shares sold in the Primary Offering at the earlier of (i) the date we list our shares on a national securities exchange, merge or consolidate with or into another entity, or sell or dispose of all or substantially all of our assets; (ii) the date at which the aggregate underwriting compensation from all sources equals 10% of the gross proceeds from the sale of both Class A Shares and Class T Shares in our Primary Offering (i.e., excluding proceeds from sales pursuant to our distribution reinvestment plan), which calculation shall be made by us with the assistance of our Former Dealer Manager commencing after the termination of the Primary Offering; (iii) the fifth anniversary of the last day of the fiscal quarter in which our Primary Offering (i.e., excluding our distribution reinvestment plan offering) terminated; and (iv) the date that such Class T Share is redeemed or is no longer outstanding. Our Former Dealer Manager entered into participating dealer agreements with certain other broker-dealers which authorized them to sell our shares. Upon sale of our shares by such broker-dealers, our Former Dealer Manager re-allowed re-allow non-accountable Foreign Currency Translation For non-U.S. Redeemable Common Stock We adopted a share redemption program (“SRP”) that enables stockholders to sell their shares to us in limited circumstances. We record amounts that are redeemable under the SRP as redeemable common stock in the accompanying consolidated balance sheets since the shares are redeemable at the option of the holder and therefore their redemption is outside our control. The maximum amount redeemable under our SRP is limited to the number of shares we can repurchase with the amount of the net proceeds from the sale of shares under the distribution reinvestment plan. However, accounting guidance states that determinable amounts that can become redeemable should be presented as redeemable when such amount is known. Therefore, the net proceeds from the distribution reinvestment plan are considered to be temporary equity and are presented as redeemable common stock in the accompanying consolidated balance sheets. In addition, current accounting guidance requires, among other things, that financial instruments that represent a mandatory obligation of us to repurchase shares be classified as liabilities and reported at settlement value. When we determine we have a mandatory obligation to repurchase shares under the SRP, we reclassify such obligations from temporary equity to a liability based upon their respective settlement values. On August 26, 2019, our board of directors approved a partial suspension of our SRP, effective as of September 27, 2019, so that common shares were redeemable at the option of the holder only in connection with (i) death or disability of a stockholder, (ii) confinement to a long-term care facility, or (iii) other exigent circumstances. In order to preserve cash in light of the uncertainty relating to COVID-19 On August 20, 2020, our board of directors determined that it would be in our best interests to partially reinstate the SRP, effective as of September 23, 2020, solely for redemptions sought in connection with a stockholder’s death, qualifying disability, or confinement to a long-term care facility. Our board of directors also authorized us to honor redemption requests made pursuant to exigent circumstances that were pending at the time of the complete suspension of our SRP and that had not been revoked. For the year ended December 31, 2019, we received redemption requests totaling approximately $4.9 million (approximately 0.5 million shares), approximately $4.5 million of which were fulfilled during the year ended December 31, 2019, with the remaining approximately $0.4 million included in accounts payable and accrued liabilities as of December 31, 2019, and fulfilled in January 2020. During the six months ended June 30, 2020, approximately 0.1 million shares, or $1.3 million, were requested to be redeemed; however, due to the suspension of our SRP, no such share redemption requests were fulfilled. During the three months ended September 30, 2020, approximately $0.7 million (approximately 0.1 million shares), were then requested to be redeemed. On October 30, 2020, requests that were previously requested during the six months ended June 30, 2020 and had not been rescinded, as well as the requests from the three months ended September 30, 2020, were redeemed, such redemptions totaled approximately 0.1 million shares, or $1.3 million, and were included in accounts payable and accrued liabilities as of September 30, 2020. Accounting for Equity Awards We issue equity based awards in two forms: (1) restricted stock awards consisting of shares of our common stock and (2) long-term incentive plan units of our Operating Partnership (“LTIP Units”), both of which may be issued subject to either time based vesting criteria or performance based vesting criteria restrictions. For time based awards granted which contain a graded vesting schedule, compensation cost is recognized as an expense on a straight-line basis over the requisite service period as if the award was, in substance, a single award. For performance based awards, compensation cost is recognized over the requisite service period if and when we determine the performance condition is probable of being achieved. We record the cost of such equity based awards based on the grant date fair value, and have elected to record forfeitures as they occur. Fair Value Measurements Under GAAP, we are required to measure certain financial instruments at fair value on a recurring basis. In addition, we are required to measure other financial instruments and balances at fair value on a non-recurring • Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities that we have the ability to access; • Level 2 inputs may include quoted prices for similar assets and liabilities in active markets, as well as interest rates and yield curves that are observable at commonly quoted intervals; and • Level 3 inputs are unobservable inputs for the assets or liabilities that are typically based on an entity’s own assumptions as there is little, if any, related market activity. In instances where the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the fair value measurement will fall within the lowest level that is significant to the fair value measurement in its entirety. The accounting guidance for fair value measurements and disclosures provides a framework for measuring fair value and establishes a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. In determining fair value, we will utilize valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible as well as consider counterparty credit risk in our assessment of fair value. Considerable judgment will be necessary to interpret Level 2 and 3 inputs in determining fair value of our financial and non-financial Financial and non-financial non-recurring The carrying amounts of cash and cash equivalents, restricted cash, other assets, variable-rate debt, accounts payable and accrued liabilities, distributions payable and amounts due to affiliates approximate fair value. The table below summarizes our fixed rate notes payable at September 30, 2020, and December 31, 2019. The estimated fair value of financial instruments is subjective in nature and is dependent on a number of important assumptions, including discount rates and relevant comparable market information associated with each financial instrument. The fair value of the fixed rate notes payable was estimated by discounting the future cash flows using the current rates at which similar loans would be made to borrowers with similar credit ratings and for the same remaining maturities. The use of different market assumptions and estimation methodologies may have a material effect on the reported estimated fair value amounts. Accordingly, the estimates presented below are not necessarily indicative of the amounts we would realize in a current market exchange. September 30, 2020 December 31, 2019 Fair Value Carrying Value Fair Value Carrying Value Fixed Rate Secured Debt $ 320,200,000 $ 302,205,553 $ 311,700,000 $ 302,820,786 As of September 30, 2020, and December 31, 2019, we had interest rate swaps, interest rate caps, and a net investment hedge (See Notes 7 and 9). The valuations of these instruments were determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of the derivative. The analyses reflect the contractual terms of the derivatives, including the period to maturity, and used observable market-based inputs, including interest rate curves, foreign exchange rates, and implied volatilities. The fair value of the interest rate swaps were determined using the market standard methodology of netting the discounted future fixed cash payments and the discounted expected variable cash payments. Our fair values of our net investment hedges are based on the change in the spot rate at the end of the period as compared with the strike price at inception. To comply with GAAP, we incorporate credit valuation adjustments to appropriately reflect both our own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of derivative contracts for the effect of non-performance Although we had determined that the majority of the inputs used to value our derivatives were within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with our derivatives utilized Level 3 inputs, such as estimates of current credit spreads, to evaluate the likelihood of default by us and our counterparties. However, through September 30, 2020, we had assessed the significance of the impact of the credit valuation adjustments on the overall valuation of our derivative positions and determined that the credit valuation adjustments were not significant to the overall valuation of our derivatives. As a result, we determined that our derivative valuations in their entirety were classified in Level 2 of the fair value hierarchy. Derivative Instruments and Hedging Activities We record all derivatives on our balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether we have elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. Derivatives designated and qualifying as a hedge of the exposure to changes in the fair value of an asset, liability, or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivatives designated and qualifying as a hedge of the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges. Derivatives may also be designated as hedges of the foreign currency exposure of a net investment in a foreign operation. We may enter into derivative contracts that are intended to economically hedge certain of our risks, even though hedge accounting does not apply or we elect not to apply hedge accounting. For derivatives designated as net investment hedges, the effective	Note 2. Summary of Significant Accounting Policies Basis of Presentation The accompanying consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) as contained within the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) and the rules and regulations of the SEC. Principles of Consolidation Our financial statements, and the financial statements of our Operating Partnership, including its wholly-owned subsidiaries, are consolidated in the accompanying consolidated financial statements. The portion of these entities not wholly-owned by us is presented as noncontrolling interests. All significant intercompany accounts and transactions have been eliminated in consolidation. Consolidation Considerations Current accounting guidance provides a framework for identifying a variable interest entity (“VIE”) and determining when a company should include the assets, liabilities, noncontrolling interests, and results of activities of a VIE in its consolidated financial statements. In general, a VIE is an entity or other legal structure used to conduct activities or hold assets that either (1) has an insufficient amount of equity to carry out its principal activities without additional subordinated financial support, (2) has a group of equity owners that are unable to make significant decisions about its activities, or (3) has a group of equity owners that do not have the obligation to absorb losses or the right to receive returns generated by its operations. Generally, a VIE should be consolidated if a party with an ownership, contractual, or other financial interest in the VIE (a variable interest holder) has the power to direct the VIE’s most significant activities and the obligation to absorb losses or right to receive benefits of the VIE that could be significant to the VIE. A variable interest holder that consolidates the VIE is called the primary beneficiary. Upon consolidation, the primary beneficiary generally must initially record all of the VIE’s assets, liabilities, and noncontrolling interest at fair value and subsequently account for the VIE as if it were consolidated based on majority voting interest. Our Operating Partnership is deemed to be a VIE and is consolidated by the Company as the primary beneficiary. As of December 31, 2019, we were not a party to any other contracts/interests that would be deemed to be variable interest in VIEs other than our Tenant Programs joint ventures with SST IV and SSGT II which were acquired in the Self Administration Transaction, which are consolidated. As of December 31, 2018, we were not a party to any other contracts/interests that would be deemed to be variable interest in VIEs other than our Tenant Programs joint venture and a real estate joint venture, both of which were accounted for under the equity method of accounting. In January 2019, we sold our interest in the real estate joint venture to SST IV, a REIT previously sponsored by SAM and now sponsored by SRA. We acquired 50% of the Tenant Programs joint venture in the Self Administration Transaction such that we now own 100% of such joint venture. Please see Note 3 – Real Estate Facilities for further discussion regarding the real estate joint venture and Note 10 – Related Party Transactions for further discussions regarding our Tenant Programs joint venture. Other than these joint ventures, we did not have any variable interest relationships with unconsolidated entities or financial partnerships as of December 31, 2018. Under the equity method, our investments in real estate joint ventures will be stated at cost and adjusted for our share of net earnings or losses and reduced by distributions. Equity in earnings will generally be recognized based on our ownership interest in the earnings of each of the unconsolidated investment. Noncontrolling Interest in Consolidated Entities We account for the noncontrolling interest in our Operating Partnership and the noncontrolling interests in our Tenant Programs joint ventures with SST IV and SSGT II in accordance with the related accounting guidance. Due to our control through our general partnership interest in our Operating Partnership and the limited rights of the limited partners, our Operating Partnership, including its wholly-owned subsidiaries, are consolidated with the Company and the limited partner interests are reflected as a noncontrolling interest in the accompanying consolidated balance sheets. We also consolidate our interests in the SST IV and SSGT II Tenant Programs and present them as noncontrolling interest in the accompanying consolidated balance sheets. The noncontrolling interests shall be attributed their share of income and losses, even if that attribution results in a deficit noncontrolling interest balance. Use of Estimates The preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. The current economic environment has increased the degree of uncertainty inherent in these estimates and assumptions. Management will adjust such estimates when facts and circumstances dictate. Actual results could materially differ from those estimates. The most significant estimates made include the allocation of property purchase price to tangible and intangible assets acquired and liabilities assumed at relative fair value, the determination if certain entities should be consolidated, the evaluation of potential impairment of indefinite and long-lived assets, and the estimated useful lives of real estate assets and intangibles. Cash and Cash Equivalents We consider all short-term, highly liquid investments that are readily convertible to cash with a maturity of three months or less at the time of purchase to be cash equivalents. We may maintain cash and cash equivalents in financial institutions in excess of insured limits, but believe this risk will be mitigated by only investing in or through major financial institutions. Restricted Cash Restricted cash consists primarily of impound reserve accounts for property taxes, insurance and capital improvements in connection with the requirements of certain of our loan agreements. Real Estate Purchase Price Allocation We account for acquisitions in accordance with GAAP which requires that we allocate the purchase price of a property to the tangible and intangible assets acquired and the liabilities assumed based on their relative fair values. This guidance requires us to make significant estimates and assumptions, including fair value estimates, which requires the use of significant unobservable inputs as of the acquisition date. The value of the tangible assets, consisting of land and buildings is determined as if vacant. Substantially all of the leases in place at acquired properties are at market rates, as the majority of the leases are month-to-month contracts. whether in-place, market in-place Allocation of purchase price to acquisitions of portfolios of facilities are allocated to the individual facilities based upon an income approach or a cash flow analysis using appropriate risk adjusted capitalization rates which take into account the relative size, age, and location of the individual facility along with current and projected occupancy and rental rate levels or appraised values, if available. Acquisitions that do not meet the definition of a business, as defined under current GAAP, are accounted for as asset acquisitions. During the years ended December 31, 2019 and 2018, our property acquisitions have not met the definition of a business because substantially all of the fair value is concentrated in a single identifiable asset or group of similar identifiable assets (i.e. land, buildings, and related intangible assets) or because the acquisition does not include a substantive process in the form of an acquired workforce or an acquired contract that cannot be replaced without significant cost, effort or delay. As a result, once an acquisition is deemed probable, transaction costs are capitalized rather than expensed. For the year ended December 31, 2017, prior to our adoption of Accounting Standards Update 2017-01, 2017-01”), During the years ended December 31, 2019, 2018, and 2017 we expensed approximately $0.2 million, $1.1 million, and $0.5 million respectively, of acquisition-related transaction costs that did not meet our capitalization policy during the respective periods. Purchase Price Allocation for the Acquisition of a Business Should the initial accounting for an acquisition that meets the definition of a business be incomplete by the end of a reporting period that falls within the measurement period, we report provisional amounts in our financial statements. During the measurement period, we adjust the provisional amounts recognized at the acquisition date to reflect new information obtained about facts and circumstances that existed as of the acquisition date that, if known, would have affected the measurement of the amounts recognized as of that date and we record those adjustments to our financial statements. We apply those measurement period adjustments in the period in which the provisional amounts are finalized. As discussed in Note 4, the Self Administration Transaction is an acquisition of a business. Evaluation of Possible Impairment of Long-Lived Assets Management monitors events and changes in circumstances that could indicate that the carrying amounts of our long-lived assets may not be recoverable. When indicators of potential impairment are present that indicate that the carrying amounts of the assets may not be recoverable, we will assess the recoverability of the assets by determining whether the carrying value of the long-lived assets will be recovered through the undiscounted future operating cash flows expected from the use of the asset and its eventual disposition. In the event that such expected undiscounted future cash flows do not exceed the carrying value, we will adjust the value of the long-lived assets to the fair value and recognize an impairment loss. For the years ended December 31, 2019, 2018, and 2017, no impairment losses were recognized. Goodwill Valuation We have recorded goodwill of approximately $78.4 million as a result of the Self Administration Transaction. Goodwill is recorded as the difference, if any, between the aggregate consideration paid for an acquisition and the fair value of the net tangible assets and other intangible assets acquired. Goodwill is allocated to various reporting units, as applicable and is not amortized. We perform an annual impairment test for goodwill and between annual tests, we evaluate the recoverability of goodwill whenever events or changes in circumstances indicate that the carrying amount of goodwill may not be fully recoverable. In our impairment test of goodwill, we perform a quantitative analysis to compare the fair value of each reporting unit to its respective carrying amount. If the carrying amount of goodwill exceeds its fair value, an impairment charge will be recognized. Trademarks Trademarks are based on the value of our brands. Trademarks are valued using the relief from royalty method, which presumes that without ownership of such trademarks, we would have to make a stream of payments to a brand or franchise owner in return for the right to use their name. By virtue of this asset, we avoid any such payments and record the related intangible fair value of our ownership of the brand name. We used the following significant projections and assumptions to determine fair value under the relief from royalty method: revenues; royalty rate; tax expense; terminal growth rate; and discount rate. For the SmartStop ® ® after-tax after-tax after-tax 15-year We will evaluate whether any triggering events or changes in circumstances have occurred subsequent to our annual impairment test that would indicate an impairment condition may exist. If any change in circumstance or triggering event occurs, and results in a significant impact to our revenue and profitability projections, or any significant assumption in our valuations methods is adversely impacted, the impact could result in a material impairment charge in the future. In connection with the Self Administration Transaction, we recorded $19.8 million associated with the two primary trademarks acquired. Prior thereto we had no amounts recorded related to trademarks. Approximately $18.7 million of the original $19.8 million of trademarks relates to the “SmartStop ® ® ® The total estimated future amortization expense of the “Strategic Storage ® Revenue Recognition Self Storage Operations Management believes that all of our leases are operating leases. Rental income is recognized in accordance with the terms of the leases, which generally are month-to-month. Managed REIT Platform We earn property management revenue and asset management revenue, pursuant to the respective property management and advisory agreement contracts, in connection with providing services to the Managed REITs. We have determined under ASC 606 – Revenue from Contracts with Customers (“ASC 606”), that the performance obligation for the property management services and asset management services are satisfied as the services are rendered. While we are compensated for our services on a monthly basis, these services represent a series of distinct daily services in accordance with ASC 606. Such revenue is recorded in the Managed REIT Platform revenue line within our consolidated statements of operations. The Managed REITs’ advisory agreements also provide for reimbursement to us of our direct and indirect costs of providing administrative and management services to the Managed REITs. These reimbursements include costs incurred in relation to organization and offering services provided to the Managed REITs and the reimbursement of salaries, bonuses, and other expenses related to benefits paid to our employees while performing services for the Managed REITs. The Managed REITs’ property management agreements also provide reimbursement to us for the property manager’s costs of managing the properties. Reimbursable costs include wages and salaries and other expenses that arise in operating, managing and maintaining the Managed REITs’ properties. Under ASC 606, direct reimbursement of such costs does not represent a separate performance obligation from our obligation to perform property management and asset management services. The reimbursement income is considered variable consideration, and is recognized as the costs are incurred, subject to limitations on the Managed REIT Platform’s ability to incur offering costs or limitations imposed by the advisory agreements. We have elected to separately record such revenue in the Reimbursable costs from Managed REITs line within our consolidated statements of operations. Additionally, we earn revenue in connection with our Tenant Programs joint ventures with our Managed REITs. We also earn development and construction management revenue from services we provide in connection with the project design, coordination and oversite of development and certain capital improvement projects undertaken by the Managed REITs. We recognize such revenue in the Managed REIT Platform revenue line within our consolidated statements of operations. See Note 10 – Related Party Transactions, for additional information regarding revenue generated from our Managed REIT Platform. Allowance for Doubtful Accounts Tenant accounts receivable is reported net of an allowance for doubtful accounts. Management records a general reserve estimate based upon a review of the current status of tenant accounts receivable. It is reasonably possible that management’s estimate of the allowance will change in the future. Real Estate Facilities Real estate facilities are recorded based on the relative fair value as of the date of acquisition. We capitalize costs incurred to develop, construct, renovate and improve properties, including interest and property taxes incurred during the construction period. The construction period begins when expenditures for the real estate assets have been made and activities that are necessary to prepare the asset for its intended use are in progress. The construction period ends when the asset is substantially complete and ready for its intended use. Depreciation of Real Property Assets Our management is required to make subjective assessments as to the useful lives of our depreciable assets. We consider the period of future benefit of the asset to determine the appropriate useful lives. Depreciation of our real property assets is charged to expense on a straight-line basis over the estimated useful lives as follows: Description Standard Depreciable Life Land Not Depreciated Buildings 30-40 Site Improvements 7-10 Depreciation of Personal Property Assets Personal property assets consist primarily of furniture, fixtures and equipment and are depreciated on a straight-line basis over the estimated useful lives generally ranging from 3 to 5 years, and are included in other assets on our consolidated balance sheets. Intangible Assets We have allocated a portion of our real estate purchase price to in-place in-place in-place in-place in-place in-place The total estimated future amortization expense of intangible assets related to our self storage properties for the years ending December 31, 2020, 2021, 2022, 2023, 2024, and thereafter is approximately $5.0 million, $0.1 million, $0.1 million, $0.1 million, $0.1 million, and $1.0 million respectively. In connection with the Self Administration Transaction, we allocated a portion of the consideration to the contracts that we acquired related to the Managed REITs and the customer relationships related to the Tenant Programs joint ventures. For these intangibles, we are amortizing such amounts on a straight-line basis over the estimated benefit period of the contracts and customer relationships. As of December 31, 2019, the gross amount allocated to the contracts and customer relationships was approximately $26.5 million and the accumulated amortization was approximately $2.9 million. The total estimated future amortization expense for such intangible assets for the years ending December 31, 2020, 2021, 2022, 2023, 2024 and thereafter is approximately $5.7 million, $4.6 million, $4.6 million, $4.6 million, and $4.1 million, respectively. Debt Issuance Costs The net carrying value of costs incurred in connection with our former revolving credit facility was presented as debt issuance costs on our consolidated balance sheet as of December 31, 2018. As of December 31, 2019 and 2018, accumulated amortization of debt issuance costs related to our revolving credit facility totaled none and approximately $45,000, respectively. The net carrying value of costs incurred in connection with obtaining non revolving debt are presented on the balance sheet as a deduction from debt (see Note 6). Debt issuance costs are amortized on a straight-line basis non-revolving Organizational and Offering Costs We pay our Dealer Manager an ongoing stockholder servicing fee that is payable monthly and accrues daily in an amount equal to 1/365th of 1% of the purchase price per share of the Class T Shares sold in the Primary Offering. We will cease paying the stockholder servicing fee with respect to the Class T Shares sold in the Primary Offering at the earlier of (i) the date we list our shares on a national securities exchange, merge or consolidate with or into another entity, or sell or dispose of all or substantially all of our assets, (ii) the date at which the aggregate underwriting compensation from all sources equals 10% of the gross proceeds from the sale of both Class A Shares and Class T Shares in our Primary Offering (i.e., excluding proceeds from sales pursuant to our distribution reinvestment plan), which calculation shall be made by us with the assistance of our Dealer Manager commencing after the termination of the Primary Offering; (iii) the fifth anniversary of the last day of the fiscal quarter in which our Primary Offering (i.e., excluding our distribution reinvestment plan offering) terminated; and (iv) the date that such Class T Share is redeemed or is no longer outstanding. Our Dealer Manager entered into participating dealer agreements with certain other broker-dealers which authorized them to sell our shares. Upon sale of our shares by such broker-dealers, our Dealer Manager re-allowed re-allow non-accountable Foreign Currency Translation For non-U.S. Redeemable Common Stock We adopted a share redemption program that enables stockholders to sell their shares to us in limited circumstances. We record amounts that are redeemable under the share redemption program as redeemable common stock in the accompanying consolidated balance sheets since the shares are redeemable at the option of the holder and therefore their redemption is outside our control. The maximum amount redeemable under our share redemption program is limited to the number of shares we can repurchase with the amount of the net proceeds from the sale of shares under the distribution reinvestment plan. However, accounting guidance states that determinable amounts that can become redeemable should be presented as redeemable when such amount is known. Therefore, the net proceeds from the distribution reinvestment plan are considered to be temporary equity and are presented as redeemable common stock in the accompanying consolidated balance sheets. In addition, current accounting guidance requires, among other things, that financial instruments that represent a mandatory obligation of us to repurchase shares be classified as liabilities and reported at settlement value. On August 26, 2019, our board of directors approved the suspension of our share redemption program, effective as of September 27, 2019, so that common shares are redeemable at the option of the holder only in connection with (i) death or disability of a stockholder, (ii) confinement to a long-term care facility, or (iii) other exigent circumstances. When we determine we have a mandatory obligation to repurchase shares under the share redemption program, we reclassify such obligations from temporary equity to a liability based upon their respective settlement values. For the year ended December 31, 2019, we received redemption requests totaling approximately $4.9 million (approximately 0.5 million shares), approximately $4.5 million of which were fulfilled during the year ended December 31, 2019, with the remaining approximately $0.4 million included in accounts payable and accrued liabilities as of December 31, 2019 and fulfilled in January 2020. For the year ended December 31, 2018, we received redemption requests totaling approximately $8.3 million (approximately 0.9 million shares), approximately $7.0 million of which were fulfilled during the year ended December 31, 2018, with the remaining approximately $1.3 million included in accounts payable and accrued liabilities as of December 31, 2018 and fulfilled in January 2019. For the year ended December 31, 2017 we received redemption requests totaling approximately $2.2 million, (approximately 0.2 million shares), approximately $1.5 million of which were fulfilled during the year ended December 31, 2017, with the remaining approximately $0.7 million included in accounts payable and accrued liabilities as of December 31, 2017 and fulfilled in January 2018. Accounting for Equity Awards Through December 31, 2019, we have only issued service based awards. The cost of such restricted stock awards is required to be measured based on the grant date fair value and the cost recognized over the relevant service period. We have assumed no forfeitures in recognizing these costs; any such forfeitures will be recognized upon occurrence and will reduce the previously recognized expenses. Fair Value Measurements Under GAAP, we are required to measure certain financial instruments at fair value on a recurring basis. In addition, we are required to measure other financial instruments and balances at fair value on a non-recurring • Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities that we have the ability to access; • Level 2 inputs may include quoted prices for similar assets and liabilities in active markets, as well as interest rates and yield curves that are observable at commonly quoted intervals; and • Level 3 inputs are unobservable inputs for the assets or liabilities that are typically based on an entity’s own assumptions as there is little, if any, related market activity. In instances where the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the fair value measurement will fall within the lowest level that is significant to the fair value measurement in its entirety. The accounting guidance for fair value measurements and disclosures provides a framework for measuring fair value and establishes a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. In determining fair value, we will utilize valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible as well as consider counterparty credit risk in our assessment of fair value. Considerable judgment will be necessary to interpret Level 2 and 3 inputs in determining fair value of our financial and non-financial Financial and non-financial non-recurring Self Administration Transaction The carrying amounts of cash and cash equivalents, restricted cash, other assets, variable-rate debt, accounts payable and accrued liabilities, distributions payable and amounts due to affiliates approximate fair value. The table below summarizes our fixed rate notes payable at December 31, 2019 and 2018. The estimated fair value of financial instruments is subjective in nature and is dependent on a number of important assumptions, including discount rates and relevant comparable market information associated with each financial instrument. The fair value of the fixed rate notes payable was estimated by discounting the future cash flows using the current rates at which similar loans would be made to borrowers with similar credit ratings and for the same remaining maturities. The use of different market assumptions and estimation methodologies may have a material effect on the reported estimated fair value amounts. Accordingly, the estimates presented below are not necessarily indicative of the amounts we would realize in a current market exchange. December 31, 2019 December 31, 2018 Fair Value Carrying Value Fair Value Carrying Value Fixed Rate Secured Debt $ 311,700,000 $ 302,820,786 $ 200,600,000 $ 207,357,391 As of December 31, 2019, and 2018, we had interest rate swaps, interest rate caps, and a net investment hedge (See Notes 6 and 8). The valuations of these instruments were determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of the derivative. The analysis reflected the contractual terms of the derivative, including the period to maturity, and used observable market-based inputs, including interest rate curves, foreign exchange rates, and implied volatilities. The fair value of the interest rate swaps were determined using the market standard methodology of netting the discounted future fixed cash payments and the discounted expected variable cash payments. Our fair values of our net investment hedges are based on the change in the spot rate at the end of the period as compared with the strike price at inception. To comply with GAAP, we incorporate credit valuation adjustments to appropriately reflect both our own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of derivative contracts for the effect of non-performance Although we had determined that the majority of the inputs used to value our derivatives were within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with our derivatives utilized Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by us and our counterparties. However, through December 31, 2019, we had assessed the significance of the impact of the credit valuation adjustments on the overall valuation of our derivative positions and determined that the credit valuation adjustments were not significant to the overall valuation of our derivatives. As a result, we determined that our derivative valuations in their entirety were classified in Level 2 of the fair value hierarchy. Derivative Instruments and Hedging Activities We record all derivatives on our balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether we have elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. Derivatives designated and qualifying as a hedge of the exposure to changes in the fair value of an asset, liability, or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivatives designated and qualifying as a hedge of the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges. Derivatives may also be designated as hedges of the foreign currency exposure of a net investment in a foreign operation. We may enter into derivative contracts that are intended to economically hedge certain of our risks, even though hedge accounting does not apply or we elect not to apply hedge accounting. For derivatives designated as net investment hedges, the effective portion of changes in the fair value of the derivatives are reported in accumulated other comprehensive income. The ineffective portion of the change in fair value of the derivatives is recognized directly in earnings. Amounts are reclassified out of other comprehensive (loss) income into earnings (loss) when the hedged net investment is either sold or substantially liquidated. Income Taxes We made an election to be taxed as a Real Estate Investment Trust (“REIT”), under Sections 856 through 860 of the Internal Revenue Code of 1986, as amended (the “Code”), commencing with our taxable year ended December 31, 2014. To qualify as a REIT, we must continue to meet certain organizational and operational requirements, including a requirement to distribute at least 90% of the REIT’s ordinary taxable income to stockholders (which is computed without regard to the dividends paid deduction or net capital gains and which does not necessarily equal net income as calculated in accordance with GAAP). As a REIT, we generally will not be subject to federal income tax on taxable income that we distribute to our stockholders. If we fail to qualify as a REIT in any taxable year, we will then be subject to federal income taxes on our taxable income at regular corporate rates and will not be permitted to qualify for treatment as a REIT for federal income tax purposes for four years following the year during which qualification is lost unless the IRS grants us relief under certain statutory provisions. Such an event could materially adversely affect our net income and net cash available for distribution to stockholders. However, we believe that we are organized and operate in such a manner as to qualify for treatment as a REIT and intend to operate in the foreseeable future in such a manner that we will remain qualified as a REIT for federal income tax purposes. Even if we continue to qualify for taxation as a REIT, we may be subject to certain state and local taxes on our income and property, and federal income and excise taxes on our undistributed income. We filed an election to treat our TRS as a taxable REIT subsidiary effective January 1, 2014. In general, the TRS performs additional services for our customers and provides the advisory and property management services to the Managed REITs and otherwise generally engages in any real estate or non-real Segment Reporting Our business is comprised of two reportable

Real Estate Facilities

Real Estate Facilities	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Real Estate [Abstract]
Real Estate Facilities	Note 3. Real Estate Facilities The following summarizes the activity in real estate facilities during the nine months ended September 30, 2020: Real estate facilities Balance at December 31, 2019 $ 1,173,825,368 Real estate acquisitions 812,892 Construction in process placed in service 13,389,703 Impact of foreign exchange rate changes (4,145,778 ) Improvements and additions 7,155,135 Balance at September 30, 2020 $ 1,191,037,320 Accumulated depreciation Balance at December 31, 2019 $ (83,692,491 ) Depreciation expense (23,136,367 ) Impact of foreign exchange rate changes 272,635 Balance at September 30, 2020 $ (106,556,223 ) Land Acquisition – Riverview, Florida On July 21, 2020, we purchased an undeveloped parcel of land adjacent to our existing Riverview, Florida self storage facility for $800,000, plus closing costs. We acquired the parcel from an unaffiliated third party and are in process of expanding our existing self storage facility on the newly acquired land; thereby adding approximately 170 units and approximately 25,000 rentable square feet. We expect development to be completed in the second or third quarter of 2021. Potential Acquisitions On June 2, 2020, one of our subsidiaries executed a purchase and sale agreement with an unaffiliated third party for the acquisition of a plot of land (the “Etobicoke Property”) in the city of Toronto. On September 1, 2020, we executed a second purchase and sale agreement with the same seller for the acquisition of another plot of land (the “Scarborough Property”) in the city of Toronto. We intend on developing both the Etobicoke Property and the Scarborough Property into self storage facilities. The purchase price for the Etobicoke Property and the Scarborough Property are each approximately $2.2 million CAD, with adjustment factors to the purchase price based on the final surveys, plus closing costs. We expect to complete the acquisition of the Etobicoke Property and the Scarborough Property in the second half of 2021, and first half of 2022, respectively; however, there can be no assurances that we will complete the acquisitions. If we fail to acquire the Etobicoke Property or the Scarborough Property, in addition to the incurred acquisition costs, we may also forfeit earnest money deposits as a result. Merger with Strategic Storage Growth Trust, Inc. On October 1, 2018, we, our Operating Partnership, and SST II Growth Acquisition, LLC, our wholly-owned subsidiary (“Merger Sub”), entered into an Agreement and Plan of Merger (the “SSGT Merger non-traded The proceeds used to fund the SSGT Mergers and the repayment of approximately $141 million of our outstanding debt were funded by the SSGT Merger Financings, totaling approximately $500 million, as described in Note 7. At the effective time of the SSGT Partnership Merger, each outstanding unit of partnership interest in SSGT OP was converted automatically into 1.127 units of partnership interest in our Operating Partnership, which resulted in approximately 396,000 Class A Units of our Operating Partnership being issued to SS Growth Advisor, LLC, a subsidiary of SAM. SSGT was a REIT with stated investment objectives to acquire opportunistic self storage properties, including development, and lease-up The following table reconciles the total consideration transferred during the SSGT Mergers: Fair value of consideration transferred: Cash $ 346,231,561 (1) Issuance of limited partnership units in our Operating Partnership to SS Growth Advisor, LLC 4,217,399 Total consideration transferred $ 350,448,960 (1) The approximately $346 million cash consideration consisted of approximately $320 million paid to the SSGT stockholders, approximately $19 million of SSGT debt that was repaid at closing, approximately $5 million of other SSGT liabilities paid at closing, and approximately $1 million in transaction costs.	Note 3. Real Estate Facilities The following summarizes the activity in real estate facilities during the years ended December 31, 2019 and 2018: Real estate facilities Balance at December 31, 2017 $ 829,679,477 Impact of foreign exchange rate changes (11,915,703 ) Improvements and additions 2,532,252 Balance at December 31, 2018 820,296,026 Facilities acquired through merger with SSGT 334,139,296 Asset disposals (11,688,993 ) Corporate office acquired through Self Administration Transaction 6,500,000 Other facility acquisitions 10,430,942 Impact of foreign exchange rate changes 6,582,603 Improvements and additions 7,565,494 Balance at December 31, 2019 $ 1,173,825,368 Accumulated depreciation Balance at December 31, 2017 $ (34,686,973 ) Depreciation expense (20,134,068 ) Impact of foreign exchange rate changes 556,356 Balance at December 31, 2018 (54,264,685 ) Asset disposals 202,416 Depreciation expense (29,188,668 ) Impact of foreign exchange rate changes (441,554 ) Balance at December 31, 2019 $ (83,692,491 ) Merger with Strategic Storage Growth Trust, Inc. On October 1, 2018, we, our Operating Partnership, and SST II Growth Acquisition, LLC, our wholly-owned subsidiary (“Merger Sub”), entered into an Agreement and Plan of Merger (the “SSGT Merger Agreement”) with Strategic Storage Growth Trust, Inc. (“SSGT”), a non-traded At the effective time of the SSGT REIT Merger (the “SSGT REIT Merger Effective Time”), each share of SSGT common stock, par value $0.001 per share (the “SSGT Common Stock”), outstanding immediately prior to the SSGT REIT Merger Effective Time (other than shares owned by SSGT and its subsidiaries or us and our subsidiaries) was automatically converted into the right to receive an amount in cash equal to $12.00, without interest and less any applicable withholding taxes. The proceeds used to fund the SSGT Mergers and the repayment of approximately $141 million of our outstanding debt were funded by the SSGT Merger Financings, totaling approximately $500 million, as described in Note 6. Immediately prior to the SSGT REIT Merger Effective Time, all shares of SSGT Common Stock that were subject to vesting and other restrictions also became fully vested and converted into the right to receive cash equal to $12.00 per share upon the SSGT REIT Merger. At the effective time of the SSGT Partnership Merger, each outstanding unit of partnership interest in SSGT OP was converted automatically into 1.127 units of partnership interest in our Operating Partnership, which resulted in approximately 396,000 Class A Units of our Operating Partnership being issued to SS Growth Advisor, LLC, a subsidiary of SAM. SSGT was a REIT with stated investment objectives to acquire opportunistic self storage properties, including development, and lease-up The following table reconciles the total consideration transferred during the SSGT Mergers: Fair value of consideration transferred: Cash $ 346,231,561 (1) Issuance of limited partnership units in our Operating Partnership to SS Growth Advisor, LLC 4,217,399 Total consideration transferred $ 350,448,960 (1) The approximately $346 million cash consideration consisted of approximately $320 million paid to the SSGT shareholders, approximately $19 million of SSGT debt that was repaid at closing, approximately $5 million of other SSGT liabilities paid at closing, and approximately $1 million in transaction costs. The following table summarizes the relative fair values of the assets acquired and liabilities assumed in the SSGT Mergers: Assets Acquired: Land $ 62,261,573 Buildings 255,743,767 Site improvements 16,133,956 Construction in process 5,370,773 Intangible assets 13,571,765 Cash and cash equivalents 692,965 Other assets 6,536,838 Total assets acquired $ 360,311,637 Liabilities assumed: Debt $ 5,038,435 Accounts payable and accrued liabilities 4,824,242 Total liabilities assumed $ 9,862,677 Total net assets acquired $ 350,448,960 Acquisition of Property Located in Gilbert, Arizona On January 24, 2019, we, by way of the SSGT Mergers, obtained the rights to acquire a property that was being developed into a self storage facility located in Gilbert, Arizona (the “Gilbert Property”). On July 11, 2019, upon issuance of the certificate of occupancy, we acquired the Gilbert Property for a purchase price of $10 million, plus closing costs and acquisition fees. Pursuant to the Contribution Agreement (as defined in Note 4), an acquisition fee of $175,000 was paid to SAM. We funded such acquisition through a $4.3 million draw on the Senior Term Loan and an approximate $5.7 million draw on the Secured Loan. The following table summarizes our purchase price allocation for our acquisitions during the year ended December 31, 2019: Acquisition Acquisition Date Real Estate Assets Construction in (4) Intangibles Total (1) Debt Issued or Assumed 2019 Revenue (2) 2019 Property Operating Income (2)(3) SSGT Mergers (5) 1/24/2019 $ 334,139,296 $ 5,370,773 $ 13,571,765 $ 353,081,834 $ 193,376,846 $ 21,909,300 $ 12,032,555 Riggs Rd - (6) 7/11/2019 10,430,942 — — 10,430,942 5,702,000 62,085 (44,459 ) 2019 Total $ 344,570,238 $ 5,370,773 $ 13,571,765 $ 363,512,776 $ 199,078,846 $ 21,971,385 $ 11,988,096 (1) The allocations noted above are based on a determination of the relative fair value of the total consideration provided and represent the amount paid including capitalized acquisition costs. (2) The operating results of the self storage properties acquired during the year ended December 31, 2019 have been included in our consolidated statements of operations since their respective acquisition date. (3) Property operating income excludes corporate general and administrative expenses, asset management fees, interest expenses, depreciation, amortization and acquisition expenses. (4) Construction in process relates to the Torbarrie property in Toronto, Canada, which is a self storage property under construction. Such facility partially opened in March 2020. (5) SSGT had stated investment objectives to acquire opportunistic self storage properties, including development, and lease-up (6) The Gilbert Property was recently developed and acquired, with 0% occupancy as of its acquisition date. Sale of San Antonio II Property The San Antonio II Property was acquired by us in the SSGT Mergers. Given pending capital improvement requirements and a higher and better use for the property, we executed a purchase and sale agreement with an unaffiliated third party to sell the San Antonio II Property for approximately $16.1 million, less closing costs. The San Antonio II Property sale was completed on October 18, 2019 and we recorded a gain on sale of real estate of approximately $3.9 million in our consolidated statement of operations for the year ended December 31, 2019. With the proceeds, we paid off approximately $9.9 million of the Secured Loan, and approximately $5.4 million of the Senior Term Loan. See Note 6, Debt, for more information on such loans. Joint Venture with SmartCentres In January 2018, SAM, through two of its subsidiaries, entered into a joint venture framework agreement with a subsidiary of SmartCentres Real Estate Investment Trust, an unaffiliated third party (“SmartCentres”), pursuant to which the parties agreed that SmartCentres would develop and construct certain properties located in Canada and identified as joint venture sites, and SAM would operate the self storage business located at such properties utilizing the “SmartStop” brand (the “SmartCentres Joint Venture”). The SmartCentres Joint Venture properties would be co-owned In January 2018, a subsidiary of SAM entered into a contribution agreement (the “SmartCentres Contribution Agreement”) with a subsidiary of SmartCentres for a tract of land owned by SmartCentres and located in East York, Ontario (the “East York Lot”) in Canada. In March 2018, the interest in the SmartCentres Contribution Agreement was assigned to one of our subsidiaries. On June 28, 2018, we closed on the East York Lot, which is owned by a limited partnership (the “Limited Partnership”), in which we (through our subsidiary) and SmartCentres (through its subsidiary) were each a 50% limited partner and each had an equal ranking general partner in the Limited Partnership. At closing, we subscribed for 50% of the units in the Limited Partnership at an agreed upon subscription price of approximately $3.8 million CAD, representing a contribution equivalent to 50% of the agreed upon fair market value of the land. The Limited Partnership intends to develop a self storage facility on the East York Lot. The value of the land contributed to the Limited Partnership had an agreed upon fair market value of approximately $7.6 million CAD. In January 2019, we sold our interest in the Limited Partnership to SST IV for approximately $4.7 million CAD, which represented our total cost incurred related to the Limited Partnership. Of this amount, approximately $4.6 million CAD related to the acquisition of land and development costs incurred, and approximately $100,000 CAD related to acquisition costs that were expensed during 2018, which were recorded in other income (expense) in the consolidated statement of operations for year ended December 31, 2019.

Self Administration Transaction

Self Administration Transaction	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Business Combinations [Abstract]
Self Administration Transaction	Note 4. Self Administration Transaction Overview On June 28, 2019, we, our Operating Partnership and our TRS entered into a series of transactions, agreements, and amendments to our existing agreements and arrangements with our then-sponsor SAM and SmartStop OP Holdings, LLC (“SS OP Holdings”), a subsidiary of SAM, pursuant to which, effective June 28, 2019, we acquired the self storage advisory, asset management and property management businesses and certain joint venture interests of SAM, along with certain other assets of SAM. As a result of the Self Administration Transaction, SAM is no longer our sponsor, and we are self-managed and succeed to the advisory, asset management and property management businesses and certain joint ventures previously in place for us, SST IV, SSGT II, and we have the internal capability to originate, structure and manage additional future investment products which would be sponsored by SRA. Agreements Contribution Agreement On June 28, 2019, we along with our Operating Partnership, as contributee, and SAM and SS OP Holdings, as contributor, entered into a Contribution Agreement (the “Contribution Agreement”) whereby the Operating Partnership acquired the Self Storage Platform and certain other assets, including (a) SAM’s, or its subsidiaries’, 100% membership interests in our Former External Advisor and Former External Property Managers, the advisor and property manager for SST IV, the advisor and property manager for SSGT II, entities related to the Tenant Programs joint ventures, and certain entities related to SAM’s self storage business in Canada; (b) all equipment, furnishings, fixtures and computer equipment as set forth in the Contribution Agreement; (c) certain personal property as set forth in the Contribution Agreement; (d) all intellectual property, goodwill, licenses and sublicenses granted and obtained with respect thereto (including all rights to the “SmartStop ® ® on-site Class A-1 (“Class A-1 Class A-2 (“Class A-2 Class A-1 Class A-2 Third Amended and Restated Limited Partnership Agreement and Redemption of Limited Partner Interest Agreement On June 28, 2019, we entered into the Third Amended and Restated Limited Partnership Agreement of the Operating Partnership (the “Operating Partnership Agreement”), which amended and superseded the Second Amended and Restated Limited Partnership Agreement (the “Former OP Agreement”), and a Redemption of Limited Partner Interest Agreement (the “Redemption of Limited Partner Interest Agreement”) with the Former External Advisor and the Operating Partnership, pursuant to which the Operating Partnership redeemed all of the limited partnership interests held by the Former External Advisor in the Operating Partnership. As a result of the Redemption of Limited Partner Interest Agreement and the Self Administration Transaction, the Former External Advisor’s parent entity, SAM and its affiliates no longer hold either their previously existing 20,000 limited partnership units or their special limited partnership interest in the Operating Partnership; however, SAM received cash of $200,000 and also now holds Class A-1 Class A-2 In addition, the revised Operating Partnership Agreement created two new classes of units issued to SS OP Holdings in connection with the Self Administration Transaction: Class A-1 Class A-2 The Class A-1 “Lock-Up Class A-1 Class A-1 Class A-2 Class A-1 Class A-2 Class A-2 Class A-1 The conversion features of the Class A-2 one-third Class A-2 Class A-1 one-third Class A-2 Class A-1 one-third Class A-2 Class A-1 Class A-2 Class A-1 Class A-2 The Redemption of Limited Partner Interest Agreement contained various customary representations and warranties. Membership Interest Purchase Agreement – Ladera Office On June 28, 2019, immediately following the Self Administration Transaction, SAM and its then wholly-owned subsidiary, 10 Terrace Rd, LLC (“10 Terrace Rd”), and SmartStop Storage Advisors, LLC (“SSA”), our indirect subsidiary, entered into a Membership Interest Purchase Agreement (the “Membership Interest Purchase Agreement”), pursuant to which SSA purchased 100% of the membership interests in 10 Terrace Rd for $6.5 million, payable through the assumption of existing debt in the amount of approximately $4.2 million, and cash in the amount of approximately $2.3 million. 10 Terrace Rd is the owner of an office condominium located at 10 Terrace Rd., Ladera Ranch, California (the “Ladera Office”) which, as a result of the Membership Interest Purchase Agreement, we now indirectly own. The Ladera Office houses our corporate headquarters. Fair Value of Consideration Transferred We accounted for the Contribution Agreement and Membership Interest Purchase Agreement discussed above as a business combination under the acquisition method of accounting. During the nine months ended September 30, 2019, we incurred approximately $1.6 million for legal fees and fees and expenses of our other professional and financial advisors related to the Self Administration Transaction, which are included in the self administration transaction expenses line-item in the accompanying consolidated statements of operations. The estimated fair value of the consideration transferred totaled approximately $111.3 million and consisted of the following: Estimated Fair Value of Consideration Transferred Cash (1) $ 3,918,185 Class A-1 63,643,000 Class A-2 30,900,000 Total Consideration Transferred 98,461,185 Fair value of our preexisting 50% equity interests 12,800,000 Total $ 111,261,185 (1) We assumed a net asset of approximately $0.5 million, which per the Contribution Agreement we were required to pay to SAM the value thereof and such amount was included above as cash consideration. As a result of this acquisition, we remeasured the book value of our preexisting 50% equity method investments in our Tenant Programs joint ventures to fair value, which resulted in a gain of approximately $8.0 million which was presented in the gain resulting from acquisition of unconsolidated affiliates line-item in our consolidated statements of operations as of the date of the acquisition. The fair values of the Tenant Programs joint ventures were determined based on a discounted cash flow valuation of the projected cash flows. The estimated fair value of the Class A-1 These fair value measurements are based on significant inputs not observable in the market and thus represent a Level 3 measurement as discussed in Note 2. The key assumptions used in estimating the fair value of the Class A-1 Class A-2 The estimated fair value of the contingent earnout, Class A-2 Allocation of Consideration The consideration transferred pursuant to the Self Administration Transaction was allocated to the assets acquired and liabilities assumed, based upon their estimated fair values as of the acquisition date. The following table summarizes the estimated fair values of the assets acquired and liabilities assumed: Identifiable Assets Acquired at Fair Value Cash and cash equivalents $ 36,443 Restricted cash 94,999 Land 975,000 Building 5,389,000 Site Improvements 136,000 Equipment, furniture and fixtures 651,000 Investments in Managed REITs 5,600,000 Other assets 1,084,629 Intangibles - customer relationships 1,600,000 Trademarks 19,800,000 Intangibles - management contracts 24,900,000 Total identifiable assets acquired $ 60,267,071 Identifiable Liabilities Assumed at Fair Value Debt $ 19,219,126 Accounts payable and accrued expenses 722,286 Deferred tax liabilities, net 7,415,654 Total liabilities assumed $ 27,357,066 Net identifiable assets acquired $ 32,910,005 Goodwill 78,372,980 Non-controlling Tenant Programs joint ventures (21,800 ) Net assets acquired $ 111,261,185 The fair value estimate of property and equipment utilized a combination of the income, cost and market approaches, depending on the characteristics of the asset classification. The fair value of land was determined using the market approach, which considers sales of comparable assets and applies compensating factors for any differences specific to the particular assets. Equipment was valued based on estimated replacement cost. Building and site improvements were valued using the cost approach using a direct cost model built on estimates of replacement cost. The intangible assets acquired primarily consist of trademarks and the property management and advisory contracts related to the Managed REITs. The value of the property management and advisory contracts were determined based on a discounted cash flow valuation of the projected cash flows of the acquired contracts. The deferred tax liability is the result of differences between the GAAP carrying value of certain amortizing assets and the carrying value for tax purposes related to activities which are conducted through our TRS. The goodwill recognized was supported by several factors, including that the Company becoming self-managed; additionally, the Managed REIT Platform business brings an established management platform with numerous strategic benefits including growth from new income streams and the ability to offer new products. The results of the acquisition have been included in our consolidated statements of operations since the closing date of the transaction. Fair Value of Equity Exchanged Related to the Redemption of Limited Partnership Interests In connection with the Redemption of Limited Partner Interest Agreement and the Contribution Agreement, the Former External Advisor redeemed its special limited partnership interest and 20,000 limited partnership units in the Operating Partnership in exchange for $200,000 in cash and Class A-1 Class A-1 The estimated fair value of the Class A-1 Administrative Services Agreement On June 28, 2019, we along with our Operating Partnership, the TRS and SSA (collectively, the “Company Parties”) entered into an Administrative Services Agreement with SAM (the “Administrative Services Agreement”), which, as amended, requires that the Company Parties will be reimbursed for providing certain operational and administrative services to SAM which may include, without limitation, accounting and financial support, IT support, HR support, advisory services and operations support, and administrative support as set forth in the Administrative Services Agreement and SAM will be reimbursed for providing certain operational and administrative services to the Company Parties which may include, without limitation, due diligence support, marketing, fulfillment and offering support, events support, insurance support, and administrative and facilities support. SAM will receive reimbursement based on the actual costs for providing its services and the Company Parties will receive monthly reimbursement based on actual cost for providing its services under the Administrative Services Agreement. SAM will also pay the Company Parties an allocation of rent and overhead for the portion it occupies in the Ladera Office. Such agreement has a term of three years and is subject to certain adjustments as defined in the agreement.	Note 4. Self Administration Transaction Overview On June 28, 2019, we, our Operating Partnership and our TRS entered into a series of transactions, agreements, and amendments to our existing agreements and arrangements with our then-sponsor SAM and SS OP Holdings, a subsidiary of SAM, pursuant to which, effective June 28, 2019, we acquired the self storage advisory, asset management and property management businesses and certain joint venture interests of SAM, along with certain other assets of SAM. As a result of the Self Administration Transaction, SAM is no longer our sponsor, and we are now self-managed and succeed to the advisory, asset management and property management businesses and certain joint ventures previously in place for us, SST IV, SSGT II and we now have the internal capability to originate, structure and manage additional investment products which would be sponsored by SRA. The Self Administration Transaction and the other transactions discussed herein were approved by our board of directors at the recommendation of a special committee of our board of directors comprised solely of independent directors. Agreements Contribution Agreement On June 28, 2019, we along with our Operating Partnership, as contributee, and SAM and SS OP Holdings, as contributor, entered into a Contribution Agreement (the “Contribution Agreement”) whereby the Operating Partnership acquired the Self Storage Platform and certain other assets, including (a) SAM’s, or its subsidiaries’, 100% membership interests in our Former External Advisor and Former External Property Managers, the advisor and property manager for SST IV, the advisor and property manager for SSGT II, entities related to the Tenant Programs joint ventures, and certain entities related to SAM’s self storage business in Canada; (b) all equipment, furnishings, fixtures and computer equipment as set forth in the Contribution Agreement; (c) certain personal property as set forth in the Contribution Agreement; (d) all intellectual property, goodwill, licenses and sublicenses granted and obtained with respect thereto (including all rights to the “SmartStop ® ® on-site Class A-1 (“Class A-1 Class A-2 (“Class A-2 Class A-1 Class A-2 The Contribution Agreement contains customary representations, warranties, covenants, agreements and indemnification obligations and rights of us, the Operating Partnership, SAM and SS OP Holdings. Third Amended and Restated Limited Partnership Agreement and Redemption of Limited Partner Interest Agreement On June 28, 2019, we entered into the Third Amended and Restated Limited Partnership Agreement of the Operating Partnership, (the “Operating Partnership Agreement”), which amended and superseded the Second Amended and Restated Limited Partnership Agreement (the “Former OP Agreement”), and a Redemption of Limited Partner Interest Agreement (the “Redemption of Limited Partner Interest Agreement”) with the Former External Advisor and the Operating Partnership, pursuant to which the Operating Partnership redeemed all of the limited partnership interests held by the Former External Advisor in the Operating Partnership. As a result of the Redemption of Limited Partner Interest Agreement and the Self Administration Transaction, the Former External Advisor’s parent entity, SAM and its affiliates no longer hold either their previously existing 20,000 limited partnership units or their special limited partnership interest in the Operating Partnership; however, SAM received cash of $200,000 and also now holds Class A-1 Class A-2 As a result of the entry into the above-described Redemption of Limited Partner Interest Agreement and the Operating Partnership Agreement (1) references to the limited partner interests previously held by the Former External Advisor in the Operating Partnership have been removed from the Operating Partnership Agreement in connection with the redemption of such interests pursuant to the Redemption of Limited Partner Interest Agreement and (2) provisions related to the subordinated incentive distributions payable to the Former External Advisor pursuant to the special limited partnership interests have been removed from the Operating Partnership Agreement. Accordingly, we and our Operating Partnership will no longer have any obligation to make the Subordinated Share of Net Sale Proceeds, Subordinated Distribution Due Upon Termination of Advisory Agreement, Subordinated Incentive Listing Distribution, or Subordinated Distribution Due Upon Extraordinary Transaction (each as defined in the Former OP Agreement). In addition, the revised Operating Partnership Agreement created two new classes of units issued to SS OP Holdings in connection with the Self Administration Transaction: Class A-1 Class A-2 The Class A-1 “Lock-Up Class A-1 Class A-1 Class A-2 Class A-1 Class A-2 Class A-2 Class A-1 The conversion features of the Class A-2 one-third Class A-2 Class A-1 one-third Class A-2 Class A-1 one-third Class A-2 Class A-1 Class A-2 Class A-1 Class A-2 The Operating Partnership Agreement also provides the Class A-1 The Redemption of Limited Partner Interest Agreement contained various customary representations and warranties. Membership Interest Purchase Agreement – Ladera Office On June 28, 2019, immediately following the Self Administration Transaction, SAM and its then wholly-owned subsidiary, 10 Terrace Rd, LLC (“10 Terrace Rd”), and SmartStop Storage Advisors, LLC (“SSA”), our indirect subsidiary, entered into a Membership Interest Purchase Agreement (the “Membership Interest Purchase Agreement”), pursuant to which SSA purchased 100% of the membership interests in 10 Terrace Rd for $6.5 million, payable through the assumption of existing debt in the amount of approximately $4.2 million, and cash in the amount of approximately $2.3 million. 10 Terrace Rd is the owner of an office condominium located at 10 Terrace Rd., Ladera Ranch, California (the “Ladera Office”) which, as a result of the Membership Interest Purchase Agreement, we now indirectly own. The Ladera Office houses our corporate headquarters. Fair Value of Consideration Transferred We accounted for the Contribution Agreement and Membership Interest Purchase Agreement discussed above as a business combination under the acquisition method of accounting. During the year ended December 31, 2019, we incurred approximately $1.6 million for legal fees and fees and expenses of our other professional and financial advisors related to the Self Administration Transaction, which are included in the self administration transaction expenses line-item in the accompanying consolidated statements of operations. The estimated fair value of the consideration transferred totaled approximately $111.3 million and consisted of the following: Estimated Fair Value of Consideration Transferred Cash (1) $ 3,918,185 Class A-1 63,643,000 Class A-2 30,900,000 Total Consideration Transferred 98,461,185 Fair value of our preexisting 50% equity interests 12,800,000 Total $ 111,261,185 (1) We assumed a net asset of approximately $0.5 million, which per the Contribution Agreement we were required to pay to SAM the value thereof and such amount was included above as cash consideration. As a result of this acquisition, we remeasured the book value of our preexisting 50% equity method investments in our Tenant Programs joint ventures to fair value, which resulted in a gain of approximately $8.0 million which was presented in the gain resulting from acquisition of unconsolidated affiliates line-item in our consolidated statements of operations. The fair values of the Tenant Programs joint ventures were determined based on a discounted cash flow valuation of the projected cash flows. The estimated fair value of the Class A-1 These fair value measurements are based on significant inputs not observable in the market and thus represent a Level 3 measurement as discussed in Note 2. The key assumptions used in estimating the fair value of the Class A-1 Class A-2 The estimated fair value of the contingent earnout, Class A-2 Allocation of Consideration The consideration transferred pursuant to the Self Administration Transaction was allocated to the assets acquired and liabilities assumed, based upon their estimated fair values as of the acquisition date. The following table summarizes the estimated fair values of the assets acquired and liabilities assumed: Identifiable Assets Acquired at Fair Value Cash and cash equivalents $ 36,443 Restricted cash 94,999 Land 975,000 Building 5,389,000 Site Improvements 136,000 Equipment, furniture and fixtures 651,000 Investments in Managed REITs 5,600,000 Other assets 1,084,629 Intangibles - customer relationships 1,600,000 Trademarks 19,800,000 Intangibles - management contracts 24,900,000 Total identifiable assets acquired $ 60,267,071 Identifiable Liabilities Assumed at Fair Value Debt $ 19,219,126 Accounts payable and accrued expenses 722,286 Deferred tax liabilities, net 7,415,654 Total liabilities assumed $ 27,357,066 Net identifiable assets acquired $ 32,910,005 Goodwill 78,372,980 Non-controlling Tenant Programs joint ventures (21,800 ) Net assets acquired $ 111,261,185 The fair value estimate of property and equipment utilized a combination of the income, cost and market approaches, depending on the characteristics of the asset classification. The fair value of land was determined using the market approach, which considers sales of comparable assets and applies compensating factors for any differences specific to the particular assets. Equipment was valued based on estimated replacement cost. Building and site improvements were valued using the cost approach using a direct cost model built on estimates of replacement cost. The intangible assets acquired primarily consist of trademarks and the property management and advisory contracts related to the Managed REITs. The value of the property management and advisory contracts were determined based on a discounted cash flow valuation of the projected cash flows of the acquired contracts. The deferred tax liability is the result of differences between the GAAP carrying value of certain amortizing assets and the carrying value for tax purposes related to activities which are conducted through our TRS. The goodwill recognized is supported by several factors, including that the Company is now self-managed; additionally, the Managed REIT Platform business brings an established management platform with numerous strategic benefits including growth from new income streams and the ability to offer new products. The results of the acquisition have been included in our consolidated statements of operations since the closing date of the transaction. Debt Assumed Secured debt – Ladera Office Loan In connection with the Membership Interest Purchase Agreement, we, through 10 Terrace Rd, assumed a loan (the “Ladera Office Loan”) with KeyBank National Association (“KeyBank”) with a principal amount of approximately $4.2 million. The Ladera Office Loan is secured by a first priority deed of trust on the Ladera Office, a promissory note, an assignment of all related leases and rents and a perfected first priority security interests in all personal property, escrows and reserves; additionally, our Operating Partnership provided a non-recourse carve-out The Ladera Office Loan accrues interest at a fixed rate of 4.29% per annum through the maturity date of November 1, 2026. The loan contains a number of other customary terms and covenants. KeyBank Tenant Program Loan In connection with the Contribution Agreement, we assumed a term loan with KeyBank in an amount of approximately $15 million (the “KeyBank Tenant Program Loan”). Pursuant to the assumption of the KeyBank Tenant Program Loan, our Executive Chairman and an entity controlled by him continued to be borrowers under the loan. We provided an indemnity to our Executive Chairman and the entity controlled by him against all obligations under the loan. The KeyBank Tenant Program Loan incurred interest at a rate of 1-month The KeyBank Tenant Program Loan was paid off in full on October 29, 2019 in connection with the issuance of Series A Convertible Preferred Stock. Fair Value of Equity Exchanged Related to the Redemption of Limited Partnership Interests In connection with the Redemption of Limited Partner Interest Agreement and the Contribution Agreement, the Former External Advisor redeemed its special limited partnership interest and 20,000 limited partnership units in the Operating Partnership in exchange for $200,000 in cash and Class A-1 Class A-1 The estimated fair value of the Class A-1 Administrative Services Agreement On June 28, 2019, we along with our Operating Partnership, the TRS and SSA (collectively, the “Company Parties”) entered into an Administrative Services Agreement with SAM (the “Administrative Services Agreement”), pursuant to which the Company Parties will be reimbursed for providing certain operational and administrative services to SAM which may include, without limitation, accounting and financial support, IT support, HR support, advisory services and operations support, and administrative support as set forth in the Administrative Services Agreement and SAM will be reimbursed for providing certain operational and administrative services to the Company Parties which may include, without limitation, due diligence support, marketing, fulfillment and offering support, events support, insurance support, and administrative and facilities support. SAM will receive a monthly administrative service fee for providing its services and the Company Parties will receive monthly reimbursement based on the amount of services provided under the Administrative Services Agreement. SAM will also pay the Company Parties an allocation of rent and overhead for the portion it occupies in the Ladera Office. Such agreement has a term of three years, and is subject to certain adjustments as defined in the agreement. Registration Rights Agreement On June 28, 2019, we and our Operating Partnership entered into a registration rights agreement (the “Registration Rights Agreement”) with SS OP Holdings and certain other parties (collectively, the “Holders”). Pursuant to the Registration Rights Agreement, the Holders have the right after the Lock-Up S-3 S-11 Lock-Up Severance Plan In connection with the Self Administration Transaction, we entered into severance agreements with each of our executive officers (collectively, the “Severance Agreements”). Each of the Severance Agreements for our executive officers (collectively, the “Executive Officer Severance Agreements”) provide for separation payments upon the termination of the executive officer’s employment under various conditions. The level of severance pay varies among executive officers and depends upon the circumstances of the termination of their employment. If the executive officer violates any of the restrictive covenants set forth in the Executive Officer Severance Agreements, that executive officer’s right to receive severance payments pursuant to the Executive Officer Severance Agreements will end immediately.

Self Administration Transacti_2

Self Administration Transaction - Intangible Assets, Goodwill and Certain Other Assets and Liabilities	9 Months Ended
	Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Self Administration Transaction - Intangible Assets, Goodwill and Certain Other Assets and Liabilities	Note 5. Self Administration Transaction - Intangible Assets, Goodwill and Certain Other Assets and Liabilities The emergence and ongoing spread of the COVID-19 non-traded COVID-19 Based on the above facts, we revised our capital raise projections for the Managed REITs. We then evaluated the revised projected undiscounted future cash flows of our amortizing intangible assets to determine if they exceeded their respective carrying values and we determined that certain trademarks and management contracts acquired in the Self Administration Transaction were impaired. For such assets we recorded impairments to reduce their carrying value to their respective fair values. For our indefinite-lived trademark we determined that the carrying value was in excess of its fair value and therefore recorded an impairment equal to the difference. As a result, in March 2020, we recorded impairment charges totaling approximately $11.7 million to intangible assets, consisting of approximately $3.3 million related to our trademarks, approximately $2.2 million related to the management contracts of SST IV and approximately $6.2 million related to the management contracts of SSGT II. We similarly evaluated goodwill for impairment and determined that the carrying value of the goodwill related to our Managed REIT segment was in excess of fair value, and therefore impaired and we recognized an impairment charge of approximately $24.7 million. Goodwill related to our self storage operations was not impaired. In connection with the Self Administration Transaction, we acquired a special limited partnership interest in SST IV and SSGT II. This interest, in certain situations, may entitle us to various subordinated distributions under SST IV’s and SSGT II’s operating partnership agreements. Given the revised capital projections noted above, the projected future subordinated distributions had revised estimated fair values less than their carrying values. We deemed this difference to be an other than temporary decline in value and have therefore recorded an impairment charge of approximately $4.4 million as of March 31, 2020. As a result of the Self Administration Transaction, we recorded a deferred tax liability, which is the result of differences between the GAAP carrying value of certain amortizing assets and the carrying value for tax purposes of certain assets related to activities which are conducted through our TRS. As we reduced the GAAP carrying value of such assets, primarily the Managed REIT management contracts, we adjusted the value of our deferred tax liabilities by pro-rata In connection with the Self Administration Transaction, we issued the Class A-2 Class A-2

Pro Forma Financial Information

Pro Forma Financial Information (Unaudited)	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Business Acquisition, Pro Forma Information [Abstract]
Pro Forma Financial Information (Unaudited)	Note 6. Pro Forma Financial Information (Unaudited) The table set forth below summarizes, on a pro forma basis, the combined results of operations of the Company for the nine months ended September 30, 2020 and 2019. Such presentation reflects the Company’s acquisitions that occurred during 2019, which met the GAAP definition of a business in effect at that time, as if the acquisitions had occurred as of January 1, 2018. This pro forma information does not purport to represent what the actual consolidated results of operations of the Company would have been for the periods indicated, nor does it purport to predict the results of operations for future periods. For the Nine Months ended September 30, September 30, Pro forma revenue $ 83,770,481 $ 91,130,790 Pro forma operating expenses $ (76,609,917 ) $ (115,057,438 ) Pro forma net income (loss) attributable to common stockholders $ (22,486,573 ) $ (49,248,355 ) The pro forma financial information for the nine months ended September 30, 2020 and 2019 was adjusted to exclude none and approximately $1.6 million, respectively, for acquisition related expenses.	Note 5. Pro Forma Financial Information (Unaudited) The table set forth below summarizes, on a pro forma basis, the combined results of operations of the Company for the years ended December 31, 2019 and 2018. Such presentation reflects the Company’s acquisitions that occurred during 2019, which met the GAAP definition of a business in effect at that time, as if the acquisitions had occurred as of January 1, 2018. This pro forma information does not purport to represent what the actual consolidated results of operations of the Company would have been for the periods indicated, nor does it purport to predict the results of operations for future periods. Year Ended December 31, 2019 Year Ended December 31, 2018 Pro forma revenue $ 113,886,094 $ 84,190,199 Pro forma operating expenses $ (103,374,709 ) $ (68,661,890 ) Pro forma net income (loss) attributable to common stockholders $ (27,684,937 ) $ (3,296,311 ) The pro forma financial information for the years ended December 31, 2019 and 2018 were adjusted to exclude approximately $1.6 million and none, respectively, for acquisition related expenses.

Debt

Debt	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Debt Disclosure [Abstract]
Debt	Note 7. Debt The Company’s debt is summarized as follows: Encumbered Property September 30, 2020 December 31, 2019 Interest Rate Maturity Date KeyBank CMBS Loan (1) $ 95,000,000 $ 95,000,000 3.89 % 8/1/2026 KeyBank Florida CMBS Loan (2) 52,000,000 52,000,000 4.65 % 5/1/2027 Midland North Carolina CMBS Loan (3) 46,591,442 47,048,287 5.31 % 8/1/2024 Canadian CitiBank Loan (4) 83,274,660 85,500,660 2.73 % 10/9/2021 CMBS SASB Loan (5) 235,000,000 235,000,000 3.15 % (11) 2/9/2022 CMBS Loan (6) 104,000,000 104,000,000 5.00 % 2/1/2029 Secured Loan (7) (8) 85,512,000 85,512,000 3.00 % 1/24/2022 Stoney Creek Loan (9) 5,446,364 5,591,950 4.65 % 10/1/2021 Torbarrie Loan (10) 6,125,060 5,936,996 4.65 % 9/1/2021 Ladera Office Loan 4,119,943 4,179,994 4.29 % 11/1/2026 Premium on secured debt, net 494,168 592,505 Debt issuance costs, net (4,774,227 ) (7,629,390 ) Total debt $ 712,789,410 $ 712,733,002 (1) This fixed rate loan encumbers 29 properties (Whittier, La Verne, Santa Ana, Upland, La Habra, Monterey Park, Huntington Beach, Chico, Lancaster I, Riverside, Fairfield, Lompoc, Santa Rosa, Federal Heights, Aurora, Littleton, Bloomingdale, Crestwood, Forestville, Warren I, Sterling Heights, Troy, Warren II, Beverly, Everett, Foley, Tampa, Boynton Beach, and Lancaster II) with monthly interest only payments until September 2021, at which time both interest and principal payments will be due monthly. The separate assets of these encumbered properties are not available to pay our other debts. (2) This fixed rate loan encumbers five properties (Pompano Beach, Lake Worth, Jupiter, Royal Palm Beach, and Delray) with monthly interest only payments until June 2022, at which time both interest and principal payments will be due monthly. The separate assets of these encumbered properties are not available to pay our other debts. (3) This fixed rate loan encumbers 11 self storage properties (Asheville I, Arden, Asheville II, Hendersonville I, Asheville III, Asheville IV, Asheville V, Asheville VI, Asheville VII, Asheville VIII, and Hendersonville II) with monthly interest only payments until September 2019, at which time both interest and principal payments became due monthly. (4) This variable rate loan encumbers 10 of our Canadian properties and the amounts shown above are in USD based on the foreign exchange rate in effect of the dates presented. We purchased interest rate caps that cap CDOR at 3.0% until October 15, 2021. The separate assets of these encumbered properties are not available to pay our other debts. (5) This variable rate loan encumbers 29 properties (Morrisville, Cary, Raleigh, Vallejo, Xenia, Sidney, Troy, Greenville, Washington Court House, Richmond, Connersville, Port St Lucie, Sacramento, Concord, Oakland, Wellington, Doral, Naples, Baltimore, Aurora, Jones Blvd - Las Vegas, Russell Rd - Las Vegas, Riverside, Stockton, Azusa, Romeoville, Elgin, San Antonio, Kingwood). The separate assets of these encumbered properties are not available to pay our other debts. (6) This fixed rate loan encumbers 10 properties (Myrtle Beach I, Myrtle Beach II, Port St. Lucie, Plantation, Sonoma, Las Vegas I, Las Vegas II, Las Vegas III, Ft Pierce, Nantucket Island). The separate assets of these encumbered properties are not available to pay our other debts. (7) This variable rate loan encumbers 16 properties (Colorado Springs, Aurora, Phoenix, 3173 Sweeten Creek Rd—Asheville, Elk Grove, Garden Grove, Deaverview Rd - Asheville, Highland Center Blvd - Asheville, Sarasota, Mount Pleasant, Pembroke Pines, Riverview, Eastlake, McKinney, Hualapai Way - Las Vegas, Gilbert). The separate assets of these encumbered properties are not available to pay our other debts. (8) On January 29, 2019, we entered into a $161.2 million notional interest rate swap whereby LIBOR was fixed at approximately 2.6% until August 1, 2020. On October 29, 2019, in connection with the pay off of the Senior Term Loan, we terminated approximately $75.7 million of this interest rate swap which required a settlement payment of approximately $0.6 million. The remaining $85.5 million of the interest rate swap effectively fixed the interest rate on the Secured Loan at 5.1% until August 1, 2020. To continue hedging our interest rate risk related to this loan, we purchased an interest rate cap on August 3, 2020 with a notional amount of $80 million that effectively caps LIBOR at 0.5% through August 2, 2021. (9) This variable rate loan bears interest at a rate of 1.95% plus Royal Bank of Canada Prime Rate, which was approximately 2.45% as of September 30, 2020, and in no event shall the total interest rate fall below 4.65% per annum. The Stoney Creek loan was assumed in the SSGT Mergers and had a balance of approximately $5 million USD as of the SSGT Mergers date. The Stoney Creek loan is secured by a first lien deed of trust on the Stoney Creek property and all improvements thereto, is cross-collateralized with the Torbarrie property, and is guaranteed by the Company. The amounts shown above are in USD based on the foreign exchange rate in effect as of September 30, 2020. (10) This variable rate loan bears interest at a rate of 1.95% plus Royal Bank of Canada Prime Rate, which was approximately 2.45% as of September 30, 2020, and in no event shall the total interest rate fall below 4.65% per annum. The Torbarrie loan was assumed in the SSGT Mergers and had no outstanding balance as of the date of the SSGT Mergers. The Torbarrie loan is a construction loan and is secured by a first lien deed of trust on the Torbarrie property and all improvements thereto, is cross-collateralized with the Stoney Creek property, and is guaranteed by the Company. The amounts shown above are in USD based on the foreign exchange rate in effect as of September 30, 2020. (11) This loan incurs interest at LIBOR plus 3%, which resulted in an interest rate of 3.15% as of September 30, 2020. However, in June 2019, we purchased an interest rate swap whereby LIBOR is fixed at 1.79% though February 15, 2022, which results in an effective fixed interest rate of 4.79% on this loan. The weighted average interest rate on our consolidated debt, excluding the impact of our interest rate hedging activities, as of September 30, 2020 was approximately 3.73%. We are subject to certain restrictive covenants relating to the outstanding debt. As of September 30, 2020, we were in compliance with all such covenants. On January 24, 2019, in conjunction with the SSGT Mergers, we, through certain wholly-owned special purpose entities, entered into various financings (“SSGT Merger Financings”), as follows: Merger Financings Principal Borrowing as of Merger Date CMBS SASB Loan $ 235,000,000 CMBS Loan 104,000,000 Secured Loan 89,178,000 Senior Term Loan 72,000,000 Total $ 500,178,000 The proceeds from the SSGT Merger Financings were primarily used to facilitate the SSGT Mergers as previously described, including the payment of the SSGT merger consideration and the repayment, in full, of certain of our debt, as follows: Merger Financings Principal Repaid Raleigh/Myrtle Beach promissory note $ 11,862,471 Amended KeyBank Credit Facility 98,782,500 Oakland and Concord loan 19,443,753 $11M KeyBank Subordinate Loan 11,000,000 Total $ 141,088,724 In conjunction with the SSGT Merger Financings, we recognized a loss on extinguishment of debt of approximately $1.5 million, primarily attributable to prepayment penalties related to the early pay off of the Raleigh/Myrtle Beach promissory note and the write-off CMBS SASB Loan This loan is a $235 million commercial mortgage-backed securities (“CMBS”), single-asset/single-borrower (“SASB”) financing (the “CMBS SASB Loan”) with KeyBank, National Association (“KeyBank”) and Citi Real Estate Funding Inc. or its affiliates (“Citibank”), as initial lenders (together, the “CMBS SASB Lenders”), comprised of (A) a mortgage loan in the amount of $180 million (the “CMBS SASB Mortgage Loan”) and (B) a mezzanine loan in the amount of $55 million (the “CMBS SASB Mezzanine Loan”). The CMBS SASB Mortgage Loan is secured by a first mortgage or deed of trust on each of 29 wholly owned properties (the “CMBS SASB Properties”), and the CMBS SASB Mezzanine Loan is secured by a pledge of the equity interests in the 29 special purpose entities that own the CMBS SASB Properties. Each loan has a maturity date of February 9, 2022, which may, in certain circumstances, be extended at the option of the respective borrower for two consecutive terms of one year each, as set forth in the respective loan agreement (collectively, the “CMBS SASB Loan Agreements”). Monthly payments due under the CMBS SASB Loan Agreements are interest-only, with the full principal amount becoming due and payable on the respective maturity date. The amounts outstanding under the CMBS SASB Loan Agreements bear interest at an annual rate equal to LIBOR plus 3%. In addition, pursuant to the requirements of the CMBS SASB Loan Agreements: (a) the borrower with respect to the CMBS SASB Mortgage Loan has purchased an interest rate cap with a notional amount of $180 million, with an effective date of January 24, 2019, whereby LIBOR is capped at 3% through February 15, 2022 and (b) the borrower with respect to the CMBS SASB Mezzanine Loan has purchased an interest rate cap with a notional amount of $55 million, with an effective date of January 24, 2019, whereby LIBOR is capped at 3% through February 15, 2022. On June 7, 2019, to effectively terminate our $180 million and $55 million existing interest rate caps, we sold an offsetting interest rate cap with a notional amount of $235 million, whereby LIBOR is capped at 3% through February 15, 2022. We simultaneously entered into an interest rate swap with a notional amount of $235 million, whereby LIBOR is fixed at 1.79% through February 15, 2022. None of the CMBS SASB Loan may be prepaid, in whole or in part, without satisfying certain conditions as set forth in the respective CMBS SASB Loan Agreements, such as the payment of a spread maintenance premium if the prepayment is made within the first two years. Thereafter the CMBS SASB Loan may be prepaid in whole or in part at par without penalty. The loan documents for the CMBS SASB Loan contain: customary affirmative, negative and financial covenants; agreements; representations; warranties and borrowing conditions; reserve requirements and events of default all as set forth in such loan documents. In addition, and pursuant to the terms of the limited recourse guaranties, with respect to the CMBS SASB Mortgage Loan (the “CMBS SASB Mortgage Loan Guaranty”), and with respect to the CMBS SASB Mezzanine Loan (the “CMBS SASB Mezzanine Loan Guaranty” and collectively the “CMBS SASB Guarantees”), each dated January 24, 2019, in favor of the CMBS SASB Lenders, the Company serves as a non-recourse guarantor CMBS Loan The CMBS loan is a $104 million CMBS financing with KeyBank as lender (the “CMBS Lender”) pursuant to a mortgage loan (the “CMBS Loan”), and is secured by a first mortgage or deed of trust on each of 10 wholly owned properties. The loan has a maturity date of February 1, 2029. Monthly payments due under the loan agreement (the “CMBS Loan Agreement”) are interest-only, with the full principal amount becoming due and payable on the maturity date. The amounts outstanding under the CMBS Loan bear interest at an annual fixed rate equal to 5%. Commencing two years after securitization, the CMBS Loan may be defeased in whole, but not in part, subject to certain conditions as set forth in the CMBS Loan Agreement. The loan documents for the CMBS Loan contain: customary affirmative, negative and financial covenants; agreements; representations; warranties and borrowing conditions; reserve requirements and events of default all as set forth in such loan documents. In addition, and pursuant to the terms of the limited recourse guaranty dated January 24, 2019, in favor of the CMBS Lender, the Company serves as a non-recourse guarantor Secured Loan This represents secured financing with KeyBank, Fifth Third Bank (“Fifth Third”), and SunTrust Bank (“SunTrust”) as equal co-lenders (the The amounts outstanding under the Secured Loan Agreement bear interest at an annual rate equal to LIBOR plus 2.5%. On January 24, 2019, the borrowers entered into an interest rate swap arrangement with a notional amount of approximately $89.2 million, such that LIBOR was fixed at approximately 2.6% until August 1, 2020. On October 29, 2019, in connection with the settlement of a previously existing loan, we restructured this swap to reduce the notional amount to approximately $85.5 million, an amount equivalent to the then outstanding principal on the Secured Loan. On August 3, 2020, we purchased an interest rate cap with a notional amount of $80 million that effectively caps LIBOR at 0.5% through August 2, 2021. The Secured Loan may be prepaid at any time, subject to certain conditions as set forth in the Secured Loan Agreement. The loan documents for the Secured Loan contain: customary affirmative, negative and financial covenants; agreements; representations; warranties and borrowing conditions; reserve requirements and events of default all as set forth in such loan documents. In particular, the Secured Loan Agreement imposes certain requirements on the Company such as a total leverage ratio, tangible net worth and liquidity requirements, fixed charge coverage ratios and limits on the amount of unhedged variable rate debt exposure. On May 8, 2020, we completed an amendment to the Secured Loan with the Secured Lenders. The Secured Loan amendment revised certain financial covenants, including increasing the REIT-level liquidity covenant from $10 million to $15 million, and the addition of a REIT-level debt service coverage ratio. Additionally, the amendment added a minimum rate for LIBOR of 0.50%. In addition, and pursuant to the terms of the full recourse guaranty (the “Secured Loan Guaranty”), dated January 24, 2019, in favor of the Secured Lenders, we, along with our Operating Partnership serve as full recourse guarantors with respect to the Secured Loan. Canadian CitiBank Loan On October 11, 2018, we, through 10 special purpose entities wholly owned by our Operating Partnership, entered into a loan agreement with CitiBank, N.A. (“CitiBank”), as lender. Under the terms of the loan agreement (the “CitiBank Loan Agreement”), we have a maximum borrowing capacity of $112 million CAD, of which we initially borrowed $99.3 million CAD (the “Initial Proceeds”). The Initial Proceeds were primarily used to pay off all of the existing loans encumbering 10 of our properties located in the greater Toronto area, Canada, all of which now serve as collateral under the CitiBank Loan Agreement. As of September 30, 2020, we had an outstanding balance of $111.3 million CAD, and have the right to receive future advances in the aggregate amount of up to $0.7 million CAD, subject to certain conditions as set forth in the CitiBank Loan Agreement. The CitiBank Loan Agreement is a term loan, the original maturity date was October 9, 2020. The loan may, in certain circumstances, be extended at our option for three consecutive terms of one year each. We exercised the first one year extension option, extending the maturity date to October 9, 2021. Monthly payments due under the CitiBank Loan Agreement are interest-only, with the full principal amount becoming due and payable on the maturity date. The amounts outstanding under the CitiBank Loan Agreement bear interest at a rate equal to the sum of the “CDOR” (as defined in the CitiBank Loan Agreement) and 2.25%. If we exercise our third extension option, the interest rate shall be increased by 0.25%. In addition, pursuant to the requirements of the CitiBank Loan Agreement, we have purchased interest rate caps with a combined notional amount of $112 million CAD, whereby the CDOR is capped at 3.00% through October 15, 2021. The following table presents the future principal payment requirements on outstanding debt as of September 30, 2020: 2020 $ 184,142 2021 96,140,324 2022 323,426,408 2023 3,384,134 2024 47,043,621 2025 and thereafter 246,890,840 Total payments 717,069,469 Premium on secured debt, net 494,168 Debt issuance costs, net (4,774,227 ) Total $ 712,789,410	Note 6. Debt The Company’s debt is summarized as follows: Encumbered Property December 31, 2019 December 31, 2018 Interest Rate Maturity Date KeyBank CMBS Loan (5) $ 95,000,000 $ 95,000,000 3.89 % 8/1/2026 KeyBank Florida CMBS Loan (6) 52,000,000 52,000,000 4.65 % 5/1/2027 Midland North Carolina CMBS Loan (7) 47,048,287 47,249,999 5.31 % 8/1/2024 Canadian CitiBank Loan (8) 85,500,660 72,846,480 4.24 % 10/9/2020 CMBS SASB Loan (9) 235,000,000 — 4.76 % 2/9/2022 CMBS Loan (10) 104,000,000 — 5.00 % 2/1/2029 Secured Loan (11) (12) 85,512,000 — 4.26 % 1/24/2022 Stoney Creek Loan (13) 5,591,950 — 5.90 % 10/1/2021 Torbarrie Loan (14) 5,936,996 — 5.90 % 9/1/2021 Ladera Office Loan 4,179,994 — 4.29 % 11/1/2026 Raleigh/Myrtle Beach promissory note (1) — 11,878,396 5.73 % N/A Amended KeyBank Credit Facility (2) — 98,782,500 5.00 % N/A Oakland and Concord Loan (3) — 19,483,127 3.95 % N/A $11M KeyBank Subordinate Loan (4) — 11,000,000 6.25 % N/A Premium on secured debt, net 592,505 1,228,996 Debt issuance costs, net (7,629,390 ) (3,385,395 ) Total debt $ 712,733,002 $ 406,084,103 (1) Fixed rate debt with principal and interest payments due monthly. This promissory note was encumbered by five properties, Morrisville, Cary, Raleigh, Myrtle Beach I, and Myrtle Beach II. This loan was repaid in conjunction with the SSGT Merger financing. (2) As of December 31, 2018, this facility encumbered 21 properties (Xenia, Sidney, Troy, Greenville, Washington Court House, Richmond, Connersville, Vallejo, Port St. Lucie I, Sacramento, Sonoma, Las Vegas I, Las Vegas II, Las Vegas III, Baltimore, Aurora II, Plantation, Wellington, Naples, Port St. Lucie II, and Doral). This loan was repaid in conjunction with the SSGT Merger financing. (3) This loan was assumed during the acquisition of the Oakland and Concord properties, along with an interest rate swap with USAmeriBank that fixed the interest rate at 3.95%. This loan was repaid in conjunction with the SSGT Merger financing. (4) This variable rate loan encumbered 49% of the equity interest in the entities that own the 34 properties (the 29 properties encumbered by the KeyBank CMBS Loan and the five properties encumbered by the KeyBank Florida CMBS Loan), and was subordinate to the existing KeyBank CMBS Loan and KeyBank Florida CMBS Loan. This loan was repaid in conjunction with the SSGT Merger financing. (5) This fixed rate loan encumbers 29 properties (Whittier, La Verne, Santa Ana, Upland, La Habra, Monterey Park, Huntington Beach, Chico, Lancaster I, Riverside, Fairfield, Lompoc, Santa Rosa, Federal Heights, Aurora, Littleton, Bloomingdale, Crestwood, Forestville, Warren I, Sterling Heights, Troy, Warren II, Beverly, Everett, Foley, Tampa, Boynton Beach, and Lancaster II) with monthly interest only payments until September 2021, at which time both interest and principal payments will be due monthly. The separate assets of these encumbered properties are not available to pay our other debts. (6) This fixed rate loan encumbers five properties (Pompano Beach, Lake Worth, Jupiter, Royal Palm Beach, and Delray) with monthly interest only payments until June 2022, at which time both interest and principal payments will be due monthly. The separate assets of these encumbered properties are not available to pay our other debts. (7) This fixed rate loan encumbers 11 self storage properties (Asheville I, Arden, Asheville II, Hendersonville I, Asheville III, Asheville IV, Asheville V, Asheville VI, Asheville VII, Asheville VIII, and Hendersonville II) with monthly interest only payments until September 2019, at which time both interest and principal payments became due monthly. (8) This variable rate loan encumbers 10 of our Canadian properties and the amount shown above is in USD based on the foreign exchange rates in effect as of the dates presented. We have purchased interest rate caps that cap CDOR at 3.0% until October 15, 2021. The separate assets of these encumbered properties are not available to pay our other debts. (9) This variable rate loan encumbers our 29 properties (Morrisville, Cary, Raleigh, Vallejo, Xenia, Sidney, Troy, Greenville, Washington Court House, Richmond, Connersville, Port St Lucie, Sacramento, Concord, Oakland, Wellington, Doral, Naples, Baltimore, Aurora, Jones Blvd - Las Vegas, Russell Rd - Las Vegas, Riverside, Stockton, Azusa, Romeoville, Elgin, San Antonio, Kingwood). In June 2019, we purchased an interest rate swap whereby LIBOR is fixed at 1.79% though February 15, 2022. The separate assets of these encumbered properties are not available to pay our other debts. (10) This fixed rate loan encumbers 10 properties (Myrtle Beach I, Myrtle Beach II, Port St. Lucie, Plantation, Sonoma, Las Vegas I, Las Vegas II, Las Vegas III, Ft Pierce, Nantucket Island). (11) This variable rate loan encumbers 16 properties (Colorado Springs, Aurora, Phoenix, 3173 Sweeten Creek Rd - Asheville, Elk Grove, Garden Grove, Deaverview Rd - Asheville, Highland Center Blvd - Asheville, Sarasota, Mount Pleasant, Pembroke Pines, Riverview, Eastlake, McKinney, Hualapai Way - Las Vegas, Gilbert). The separate assets of these encumbered properties are not available to pay our other debts. (12) On January 29, 2019, we entered into a $161.2 million notional interest rate swap whereby LIBOR was fixed at approximately 2.6% until August 1, 2020. On October 29, 2019, in connection with the pay off of the Senior Term Loan, we terminated approximately $75.7 million of this interest rate swap which required a settlement payment of approximately $0.6 million. (13) This variable rate loan bears interest at a rate of 1.95% plus Royal Bank of Canada Prime Rate, which was approximately 3.95% as of December 31, 2019, and in no event shall the total interest rate fall below 4.65% per annum. The Stoney Creek loan was assumed in the SSGT Mergers and had a balance of approximately $5 million USD as of the SSGT Mergers date. The Stoney Creek loan is secured by a first lien deed of trust on the Stoney Creek property and all improvements thereto, is cross-collateralized with the Torbarrie property, and is guaranteed by the Company. The amount shown above is in USD based on the foreign exchange rate in effect as of December 31, 2019. (14) This variable rate loan bears interest at a rate of 1.95% plus Royal Bank of Canada Prime Rate, which was approximately 3.95% as of December 31, 2019, and in no event shall the total interest rate fall below 4.65% per annum. The Torbarrie loan was assumed in the SSGT Mergers and had no outstanding balance as of the date of the SSGT Mergers. The Torbarrie loan is a construction loan, which allows for borrowings up to approximately $10.3 million CAD and is secured by a first lien deed of trust on the Torbarrie property and all improvements thereto, is cross-collateralized with the Stoney Creek property, and is guaranteed by the Company. The amount shown above is in USD based on the foreign exchange rate in effect as of December 31, 2019. The weighted average interest rate on our consolidated debt as of December 31, 2019 was approximately 4.6%. We are subject to certain restrictive covenants relating to the outstanding debt. As of December 31, 2019, we were in compliance with all such covenants. On January 24, 2019, in conjunction with the SSGT Mergers, we, through certain wholly-owned special purpose entities, entered into various financings (“SSGT Merger Financings”), as follows: Merger Financings Principal Borrowing as of Merger Date CMBS SASB Loan $ 235,000,000 CMBS Loan 104,000,000 Secured Loan 89,178,000 Senior Term Loan 72,000,000 Total $ 500,178,000 The proceeds from the SSGT Merger Financings were primarily used to facilitate the SSGT Mergers as previously described, including the payment of the SSGT merger consideration and the repayment, in full, of certain of our debt, as follows: Merger Financings Principal Repaid Raleigh/Myrtle Beach promissory note $ 11,862,471 Amended KeyBank Credit Facility 98,782,500 Oakland and Concord loan 19,443,753 $11M KeyBank Subordinate Loan 11,000,000 Total $ 141,088,724 In conjunction with the SSGT Merger Financings, we recognized a loss on extinguishment of debt of approximately $1.5 million, primarily attributable to prepayment penalties related to the early pay off of the Raleigh/Myrtle Beach promissory note and the write-off CMBS SASB Loan This loan is a $235 million commercial mortgage-backed securities (“CMBS”), single-asset/single-borrower (“SASB”) financing (the “CMBS SASB Loan”) with KeyBank, National Association (“KeyBank”) and Citi Real Estate Funding Inc. or its affiliates (“Citibank”), as initial lenders (together, the “CMBS SASB Lenders”), comprised of (A) a mortgage loan in the amount of $180 million (the “CMBS SASB Mortgage Loan”) and (B) a mezzanine loan in the amount of $55 million (the “CMBS SASB Mezzanine Loan”). The CMBS SASB Mortgage Loan is secured by a first mortgage or deed of trust on each of 29 wholly owned properties (the “CMBS SASB Properties”), and the CMBS SASB Mezzanine Loan is secured by a pledge of the equity interests in the 29 special purpose entities that own the CMBS SASB Properties. Each loan has a maturity date of February 9, 2022, which may, in certain circumstances, be extended at the option of the respective borrower for two consecutive terms of one year each, as set forth in the respective loan agreement (collectively, the “CMBS SASB Loan Agreements”). Monthly payments due under the CMBS SASB Loan Agreements are interest-only, with the full principal amount becoming due and payable on the respective maturity date. The amounts outstanding under the CMBS SASB Loan Agreements bear interest at an annual rate equal to LIBOR plus 3%. In addition, pursuant to the requirements of the CMBS SASB Loan Agreements: (a) the borrower with respect to the CMBS SASB Mortgage Loan has purchased an interest rate cap with a notional amount of $180 million, with an effective date of January 24, 2019, whereby LIBOR is capped at 3% through February 15, 2022 and (b) the borrower with respect to the CMBS SASB Mezzanine Loan has purchased an interest rate cap with a notional amount of $55 million, with an effective date of January 24, 2019, whereby LIBOR is capped at 3% through February 15, 2022. On June 7, 2019, to effectively terminate our $180 million and $55 million existing interest rate caps, we sold an offsetting interest rate cap with a notional amount of $235 million, whereby LIBOR is capped at 3% through February 15, 2022. We simultaneously entered into an interest rate swap with a notional amount of $235 million, whereby LIBOR is fixed at 1.79% through February 15, 2022. None of the CMBS SASB Loan may be prepaid, in whole or in part, without satisfying certain conditions as set forth in the respective CMBS SASB Loan Agreements, such as the payment of a spread maintenance premium if the prepayment is made within the first two years. Thereafter the CMBS SASB Loan may be prepaid in whole or in part at par without penalty. The loan documents for the CMBS SASB Loan contain: customary affirmative, negative and financial covenants; agreements; representations; warranties and borrowing conditions; reserve requirements and events of default all as set forth in such loan documents. In addition, and pursuant to the terms of the limited recourse guaranties, with respect to the CMBS SASB Mortgage Loan (the “CMBS SASB Mortgage Loan Guaranty”), and with respect to the CMBS SASB Mezzanine Loan (the “CMBS SASB Mezzanine Loan Guaranty” and collectively the “CMBS SASB Guarantees”), each dated January 24, 2019, in favor of the CMBS SASB Lenders, the Company serves as a non-recourse guarantor CMBS Loan The CMBS loan is a $104 million CMBS financing with KeyBank as lender (the “CMBS Lender”) pursuant to a mortgage loan (the “CMBS Loan”), and is secured by a first mortgage or deed of trust on each of 10 wholly owned properties. The loan has a maturity date of February 1, 2029. Monthly payments due under the loan agreement (the “CMBS Loan Agreement”) are interest-only, with the full principal amount becoming due and payable on the maturity date. The amounts outstanding under the CMBS Loan bear interest at an annual fixed rate equal to 5%. Commencing two years after securitization, the CMBS Loan may be defeased in whole, but not in part, subject to certain conditions as set forth in the CMBS Loan Agreement. The loan documents for the CMBS Loan contain: customary affirmative, negative and financial covenants; agreements; representations; warranties and borrowing conditions; reserve requirements and events of default all as set forth in such loan documents. In addition, and pursuant to the terms of the limited recourse guaranty dated January 24, 2019, in favor of the CMBS Lender, the Company serves as a non-recourse guarantor Secured Loan This represents secured financing with KeyBank, Fifth Third Bank (“Fifth Third”), and SunTrust Bank (“SunTrust”) as equal co-lenders (the The amounts outstanding under the Secured Loan Agreement bear interest at an annual rate equal to LIBOR plus 2.5%. On January 24, 2019, the borrowers entered into an interest rate swap arrangement with a notional amount of approximately $89.2 million, such that LIBOR is fixed at approximately 2.6% until August 1, 2020. On October 29, 2019, in connection with the settlement of the Senior Term Loan, we restructured this swap to reduce the notional amount to approximately $85.5 million, an amount equivalent to the then outstanding principal on the Secured Loan. The Secured Loan may be prepaid at any time, subject to certain conditions as set forth in the Secured Loan Agreement. The loan documents for the Secured Loan contain: customary affirmative, negative and financial covenants; agreements; representations; warranties and borrowing conditions; reserve requirements and events of default all as set forth in such loan documents. In particular, the Secured Loan Agreement imposes certain requirements on the Company such as a total leverage ratio, tangible net worth and liquidity requirements, fixed charge coverage ratios and limits on the amount of unhedged variable rate debt exposure. In addition, and pursuant to the terms of the full recourse guaranty (the “Secured Loan Guaranty”), dated January 24, 2019, in favor of the Secured Lenders, we, along with our Operating Partnership serve as full recourse guarantors with respect to the Secured Loan. Senior Term Loan We along with our Operating Partnership entered into a financing for an amount up to $87.7 million with KeyBank and SunTrust, as co-lenders (the The amounts outstanding under the Senior Term Loan Agreement incurred interest at an annual rate equal to LIBOR plus 4.25%. On January 24, 2019, we entered into an interest rate swap arrangement with a notional amount of $72 million, such that LIBOR was fixed at approximately 2.6% until August 1, 2020. The Senior Term Loan was paid off in full on October 29, 2019 in connection with the issuance of Series A Convertible Preferred Stock. Canadian CitiBank Loan On October 11, 2018, we, through 10 special purpose entities wholly owned by our Operating Partnership, entered into a loan agreement with CitiBank, N.A. (“CitiBank”), as lender. Under the terms of the loan agreement (the “CitiBank Loan Agreement”), we have a maximum borrowing capacity of $112 million CAD, of which we initially borrowed $99.3 million CAD (the “Initial Proceeds”). The Initial Proceeds were primarily used to pay off all of the existing loans encumbering 10 of our properties located in the greater Toronto area, Canada, all of which now serve as collateral under the CitiBank Loan Agreement. As of December 31, 2019, we had an outstanding balance of $111.3 million CAD, and have the right to receive future advances in the aggregate amount of up to $0.7 million CAD, subject to certain conditions as set forth in the CitiBank Loan Agreement. The CitiBank Loan Agreement is a term loan that matures on October 9, 2020, which may, in certain circumstances, be extended at our option for three consecutive terms of one year each. Monthly payments due under the CitiBank Loan Agreement are interest-only, with the full principal amount becoming due and payable on the maturity date. The amounts outstanding under the CitiBank Loan Agreement bear interest at a rate equal to the sum of the “CDOR” (as defined in the CitiBank Loan Agreement) and 2.25%. If we exercise our third extension option, the interest rate shall be increased by 0.25%. In addition, pursuant to the requirements of the CitiBank Loan Agreement, we have purchased interest rate caps with a combined notional amount of $112 million CAD, whereby the CDOR is capped at 3.00% through October 15, 2021. Amended KeyBank Credit Facility On December 22, 2015, we, through our Operating Partnership, and certain affiliated entities, entered into an amended and restated revolving credit facility (the “Amended KeyBank Credit Facility”) with KeyBank National Association (“KeyBank”), as administrative agent and KeyBanc Capital Markets, LLC, as the sole book runner and sole lead arranger, and Texas Capital Bank, N.A., and Comerica Bank as co-lenders. Under the terms of the Amended KeyBank Credit Facility, we initially had a maximum borrowing capacity of $105 million. On February 18, 2016, we entered into a first amendment and joinder to the amended and restated credit agreement (the “First Amendment”) with KeyBank. Under the terms of the First Amendment, we added an additional $40 million to our maximum borrowing capacity for a total of $145 million with the admission of US Bank National Association (the “Subsequent Lender”). The Subsequent Lender also became a party to the Amended KeyBank Credit Facility through a joinder agreement in the First Amendment. The Amended KeyBank Credit Facility was a revolving loan with an initial term of three years, maturing on December 22, 2018, with two one-year The following table presents the future principal payment requirements on outstanding debt as of December 31, 2019: 2020 $ 86,208,937 2021 12,823,585 2022 323,426,829 2023 3,384,578 2024 47,035,146 2025 and thereafter 246,890,812 Total payments 719,769,887 Premium on secured debt, net 592,505 Debt issuance costs, net (7,629,390 ) Total $ 712,733,002

Preferred Equity

Preferred Equity	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Equity [Abstract]
Preferred Equity	Note 8. Preferred Equity Series A Convertible Preferred Stock On October 29, 2019 (the “Commitment Date”), we entered into a preferred stock purchase agreement (the “Purchase Agreement”) with Extra Space Storage LP (the “Investor”), a subsidiary of Extra Space Storage Inc. (NYSE: EXR), pursuant to which the Investor committed to purchase up to $200 million in preferred shares (the aggregate shares to be purchased, the “Preferred Shares”) of our new Series A Convertible Preferred Stock (the “Series A Convertible Preferred Stock”), in one or more closings (each, a “Closing,” and collectively, the “Closings”). The initial closing (the “Initial Closing”) in the amount of $150 million occurred on the Commitment Date, and the second and final closing in the amount of $50 million occurred on October 26, 2020. We incurred approximately $3.6 million in issuance costs related to the Series A Convertible Preferred Stock, which were recorded as a reduction to Series A Convertible Preferred stock on our consolidated balance sheets. The shares of Series A Convertible Preferred Stock rank senior to all other shares our capital stock, including our common stock, with respect to rights to receive dividends and to participate in distributions or payments upon any voluntary or involuntary liquidation, dissolution or winding up of the Company. Dividends payable on each share of Series A Convertible Preferred Stock will initially be equal to a rate of 6.25% per annum. If the Series A Convertible Preferred Stock has not been redeemed on or prior to the fifth anniversary date of the Initial Closing, the dividend rate will increase an additional 0.75% per annum each year thereafter to a maximum of 9.0% per annum until the tenth anniversary of the Initial Closing, at which time the dividend rate shall increase 0.75% per annum each year thereafter until the Series A Convertible Preferred Stock is redeemed or repurchased in full. The dividends are payable in arrears for the prior calendar quarter on or before the 15 th Upon any voluntary or involuntary liquidation, dissolution or winding up of the Company, the holders of Series A Convertible Preferred Stock will be entitled to receive a payment equal to the greater of (i) aggregate purchase price of all outstanding Preferred Shares, plus any accrued and unpaid dividends (the “Liquidation Amount”) and (ii) the amount that that would have been payable had the Preferred Shares been converted into common stock pursuant to the terms of the Purchase Agreement immediately prior to such liquidation. Subject to certain additional redemption rights, as described herein, we have the right to redeem the Series A Convertible Preferred Stock for cash at any time following the fifth anniversary of the Initial Closing. The amount of such redemption will be equal to the Liquidation Amount. Upon the listing of our common stock on a national securities exchange (the “Listing”), we have the right to redeem any or all outstanding Series A Convertible Preferred Stock at an amount equal to the greater of (i) the amount that would have been payable had such Preferred Shares been converted into common stock pursuant to the terms of the Purchase Agreement immediately prior to the Listing, and then all of such Preferred Shares were sold in the Listing, or (ii) the Liquidation Amount, plus a premium amount (the “Premium Amount”) of 10%, 8%, 6%, 4%, or 2% if redeemed prior to the first, second, third, fourth, or fifth anniversary dates of issuance, respectively, or 0% if redeemed thereafter, as set forth in the Articles Supplementary. Upon a change of control event, we have the right to redeem any or all outstanding Series A Convertible Preferred Stock at an amount equal to the greater of (i) the amount that would have been payable had the Preferred Shares been converted into common stock pursuant to the terms of the Purchase Agreement immediately prior to such change of control or (ii) the Liquidation Amount, plus the Premium Amount, as set forth in the Articles Supplementary. In addition, subject to certain cure provisions, if we fail to maintain our status as a real estate investment trust, the holders of Series A Convertible Preferred Stock have the right to require us to repurchase the Series A Convertible Preferred Stock at an amount equal to the Liquidation Amount with no Premium Amount. At any time after the earlier to occur of (i) the second anniversary of the Initial Closing or (ii) 180 days after a Listing, the holders of Series A Convertible Preferred Stock have the right to convert any or all of the Series A Convertible Preferred Stock held by such holders into common stock at a rate per share equal to the quotient obtained by dividing the Liquidation Amount by the conversion price. The conversion price is $10.66, as may be adjusted in connection with stock splits, stock dividends and other similar transactions. The holders of Series A Convertible Preferred Stock are not entitled to vote on any matter submitted to a vote of our stockholders, except that in the event that the dividend for the Series A Convertible Preferred Stock has not been paid for at least four quarters (whether or not consecutive), the holders of Series A Convertible Preferred Stock have the right to vote together with our stockholders on any matter submitted to a vote of our stockholders, upon which the holders of the Series A Convertible Preferred Stock and holders of common stock shall vote together as a single class. The number of votes applicable to a share of Series A Convertible Preferred Stock will be equal to the number of shares of common stock a share of Series A Convertible Preferred Stock could have been converted into as of the record date set for purposes of such stockholder vote. This foregoing limited voting right shall cease when all past dividend periods have been paid in full. In addition, the affirmative vote of the holders of a majority of the outstanding shares of Series A Convertible Preferred Stock is required in certain customary circumstances, as well as other circumstances, such as (i) our real estate portfolio exceeding a leverage ratio of 60% loan-to-value, In connection with the issuance of the Series A Convertible Preferred Stock, we and the Investor also entered into an investors’ rights agreement (the “Investors’ Rights Agreement”) which provides the Investor with certain customary protections, including demand registration rights and “piggyback” registration rights with respect to our common stock issued to the Investor upon conversion of the Preferred Shares. As of September 30, 2020, there were 150,000 Preferred Shares outstanding with an aggregate liquidation preference of approximately $152.5 million, which consisted of $150 million from the Initial Closing, approximately $2.3 million of accumulated and unpaid distributions, and approximately $0.1 million of accumulated and unpaid fees on the undrawn commitment. As of December 31, 2019, there were 150,000 Preferred Shares outstanding with an aggregate liquidation preference of approximately $151.7 million, which consisted of $150 million from the Initial Closing, approximately $1.7 million of accumulated and unpaid distributions, and approximately $0.1 million of accumulated and unpaid fees on the undrawn commitment. See Note 16 - Subsequent Events, for additional information	Note 7. Preferred Equity Series A Convertible Preferred Stock On October 29, 2019 (the “Commitment Date”), we entered into a preferred stock purchase agreement (the “Purchase Agreement”) with Extra Space Storage LP (the “Investor”), a subsidiary of Extra Space Storage Inc. (NYSE: EXR), pursuant to which the Investor committed to purchase up to $200 million in preferred shares (the aggregate shares to be purchased, the “Preferred Shares”) of our new Series A Convertible Preferred Stock (the “Series A Convertible Preferred Stock”), in one or more closings (each, a “Closing,” and collectively, the “Closings”). The initial closing (the “Initial Closing”) in the amount of $150 million occurred on the 12-month In connection with the Initial Closing, we filed articles supplementary to our Second Articles of Amendment and Restatement, which classified and designated 200,000 authorized but unissued shares of Preferred Stock as the Series A Convertible Preferred Stock. The shares of Series A Convertible Preferred Stock rank senior to all other shares our capital stock, including our common stock, with respect to rights to receive dividends and to participate in distributions or payments upon any voluntary or involuntary liquidation, dissolution or winding up of the Company. Dividends payable on each share of Series A Convertible Preferred Stock will initially be equal to a rate of 6.25% per annum. If the Series A Convertible Preferred Stock has not been redeemed on or prior to the fifth anniversary date of the Initial Closing, the dividend rate will increase an additional 0.75% per annum each year thereafter to a maximum of 9.0% per annum until the tenth anniversary of the Initial Closing, at which time the dividend rate shall increase 0.75% per annum each year thereafter until the Series A Convertible Preferred Stock is redeemed or repurchased in full. The dividends are payable in arrears for the prior calendar quarter on or before the 15 th Upon any voluntary or involuntary liquidation, dissolution or winding up of the Company, the holders of Series A Convertible Preferred Stock will be entitled to receive a payment equal to the greater of (i) aggregate purchase price of all outstanding Preferred Shares, plus any accrued and unpaid dividends (the “Liquidation Amount”) and (ii) the amount that that would have been payable had the Preferred Shares been converted into common stock pursuant to the terms of the Purchase Agreement immediately prior to such liquidation. Subject to certain additional redemption rights, as described herein, we have the right to redeem the Series A Convertible Preferred Stock for cash at any time following the fifth anniversary of the Initial Closing. The amount of such redemption will be equal to the Liquidation Amount. Upon the listing of our common stock on a national securities exchange (the “Listing”), we have the right to redeem any or all outstanding Series A Convertible Preferred Stock at an amount equal to the greater of (i) the amount that would have been payable had such Preferred Shares been converted into common stock pursuant to the terms of the Purchase Agreement immediately prior to the Listing, and then all of such Preferred Shares were sold in the Listing, or (ii) the Liquidation Amount, plus a premium amount (the “Premium Amount”) of 10%, 8%, 6%, 4%, or 2% if redeemed prior to the first, second, third, fourth, or fifth anniversary dates of issuance, respectively, or 0% if redeemed thereafter, as set forth in the Articles Supplementary. Upon a change of control event, we have the right to redeem any or all outstanding Series A Convertible Preferred Stock at an amount equal to the greater of (i) the amount that would have been payable had the Preferred Shares been converted into common stock pursuant to the terms of the Purchase Agreement immediately prior to such change of control or (ii) the Liquidation Amount, plus the Premium Amount, as set forth in the Articles Supplementary. In addition, subject to certain cure provisions, if we fail to maintain our status as a real estate investment trust, the holders of Series A Convertible Preferred Stock have the right to require us to repurchase the Series A Convertible Preferred Stock at an amount equal to the Liquidation Amount with no Premium Amount. At any time after the earlier to occur of (i) the second anniversary of the Initial Closing or (ii) 180 days after a Listing, the holders of Series A Convertible Preferred Stock have the right to convert any or all of the Series A Convertible Preferred Stock held by such holders into common stock at a rate per share equal to the quotient obtained by dividing the Liquidation Amount by the conversion price. The conversion price is $10.66, as may be adjusted in connection with stock splits, stock dividends and other similar transactions. The holders of Series A Convertible Preferred Stock are not entitled to vote on any matter submitted to a vote of our stockholders, except that in the event that the dividend for the Series A Convertible Preferred Stock has not been paid for at least four quarters (whether or not consecutive), the holders of Series A Convertible Preferred Stock have the right to vote together with our stockholders on any matter submitted to a vote of our stockholders, upon which the holders of the Series A Convertible Preferred Stock and holders of common stock shall vote together as a single class. The number of votes applicable to a share of Series A Convertible Preferred Stock will be equal to the number of shares of common stock a share of Series A Convertible Preferred Stock could have been converted into as of the record date set for purposes of such stockholder vote. This foregoing limited voting right shall cease when all past dividend periods have been paid in full. In addition, the affirmative vote of the holders of a majority of the outstanding shares of Series A Convertible Preferred Stock is required in certain customary circumstances, as well as other circumstances, such as (i) our real estate portfolio exceeding a leverage ratio of 60% loan-to-value, In connection with the issuance of the Series A Convertible Preferred Stock, we and the Investor also entered into an investors’ rights agreement (the “Investors’ Rights Agreement”) which provides the Investor with certain customary protections, including demand registration rights and “piggyback” registration rights with respect to our common stock issued to the Investor upon conversion of the Preferred Shares. As of December 31, 2019 there were 150,000 Preferred Shares outstanding with an aggregate liquidation preference of approximately $151.7 million, which consisted of $150 million from the Initial Closing and approximately $1.6 million of accumulated and unpaid distributions. There were no Preferred Shares issued or outstanding as of December 31, 2018.

Derivative Instruments

Derivative Instruments	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	Note 9. Derivative Instruments Interest Rate Derivatives Our objectives in using interest rate derivatives are to add stability to interest expense and to manage our exposure to interest rate movements. To accomplish this objective, we use interest rate swaps and caps as part of our interest rate risk management strategy. The effective portion of the change in the fair value of the derivative that qualifies as a cash flow hedge is recorded in accumulated other comprehensive income (loss) (“AOCI”) and is subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. Amounts reported in AOCI related to derivatives will be reclassified to interest expense as interest payments are made on our variable-rate debt. We do not use interest rate derivatives for trading or speculative purposes. Derivatives not designated as hedges are not speculative and are used to manage our exposure to interest rate movements and other identified risks but we have elected not to apply hedge accounting. Changes in the fair value of interest rate derivatives not designated in hedging relationships are recorded in other income (expense) as income within our consolidated statements of operations. Foreign Currency Hedges Our objectives in using foreign currency derivatives are to add stability to potential fluctuations in exchange rates between foreign currencies and the U.S. dollar and to manage our exposure to exchange rate movements. To accomplish this objective, we use foreign currency forwards and foreign currency options as part of our exchange rate risk management strategy. A foreign currency forward contract is a commitment to deliver a certain amount of currency at a certain price on a specific date in the future. By entering into the forward contract and holding it to maturity, we are locked into a future currency exchange rate in an amount equal to and for the term of the forward contract. A foreign currency option contract is a commitment by the seller of the option to deliver, solely at the option of the buyer, a certain amount of currency at a certain price on a specific date. For derivatives designated as net investment hedges, the changes in the fair value of the derivatives are reported in accumulated other comprehensive income. Amounts are reclassified out of accumulated other comprehensive income (loss) into earnings when the hedged net investment is either sold or substantially liquidated. The following table summarizes the terms of our derivative financial instruments as of September 30, 2020: Notional Amount Strike Effective Date Maturity Date Interest Rate Swaps: LIBOR Swap $ 235,000,000 1.79 % June 15, 2019 February 15, 2022 Interest Rate Cap: LIBOR Cap $ 80,000,000 0.50 % August 3, 2020 August 2, 2021 CDOR Cap 99,300,000 (1) 3.00 % October 11, 2018 October 15, 2021 CDOR Cap 1,000,000 (1) 3.00 % March 28, 2019 October 15, 2021 CDOR Cap 11,700,000 (1) 3.00 % May 28, 2019 October 15, 2021 Foreign Currency Forward: Denominated in CAD $ 95,000,000 (1) 1.334 February 10, 2020 February 10, 2021 (1) Notional amounts shown are denominated in CAD. On January 25, 2019, we settled a $90 million CAD foreign currency forward, receiving a net settlement of approximately $2.1 million and simultaneously entered into a $95 million CAD foreign currency forward. On July 8, 2019, we settled the $95 million CAD foreign currency forward, paying a net settlement of approximately $0.6 million and simultaneously entered into a $95 million CAD currency option. On December 9, 2019 the CAD currency option expired and we simultaneously entered into a two month $95 million CAD foreign currency forward. On February 10, 2020, we settled the CAD currency forward, receiving a net settlement of approximately $0.5 million and simultaneously entered into a one year $95 million CAD foreign currency forward. A portion of our gain (loss) from our settled and unsettled foreign currency hedges is recorded net in foreign currency hedge contract gain (loss) in our consolidated statements of comprehensive loss, the other portion, a loss of approximately $0.4 million and a gain of approximately $0.1 million related to the ineffective portion is recorded in other income (expense) within our consolidated statements of operations for the three and nine months ended September 30, 2020, respectively. The following table summarizes the terms of our derivative financial instruments as of December 31, 2019: Notional Amount Strike Effective Date Maturity Date Interest Rate Swaps: LIBOR Swap $ 85,512,000 2.61 % January 24, 2019 August 1, 2020 (3) LIBOR Swap 235,000,000 1.79 % June 15, 2019 February 15, 2022 Interest Rate Cap: CDOR Cap $ 99,300,000 (1) 3.00 % October 11, 2018 October 15, 2021 CDOR Cap 1,000,000 (1) 3.00 % March 28, 2019 October 15, 2021 CDOR Cap 11,700,000 (1) 3.00 % May 28, 2019 October 15, 2021 Foreign Currency Option: Denominated in CAD $ 95,000,000 (1) 1.323 December 9, 2019 February 10, 2020 (2) (1) Notional amount shown is denominated in CAD. (2) We settled this forward on February 10, 2020, receiving a net settlement of approximately $0.5 million and simultaneously entered into another $95 million CAD foreign currency forward with a maturity date of February 10, 2021. (3) On August 3, 2020, we entered into a LIBOR interest rate cap for a notional amount of $80 million which caps LIBOR at 0.5% through August 2, 2021. The following table presents a gross presentation of the fair value of our derivative financial instruments as well as their classification on our consolidated balance sheets as of September 30, 2020 and December 31, 2019: Asset/Liability Derivatives Fair Value Balance Sheet Location September 30, 2020 December 31, 2019 Interest Rate Swaps Accounts payable and accrued liabilities $ 5,286,666 $ 1,695,140 Interest Rate Caps Other assets $ — $ 28,847 Foreign Currency Hedges Other assets $ — $ — Accounts payable and accrued liabilities 149,200 1,425,632	Note 8. Derivative Instruments Interest Rate Derivatives Our objectives in using interest rate derivatives are to add stability to interest expense and to manage our exposure to interest rate movements. To accomplish this objective, we use interest rate swaps and caps as part of our interest rate risk management strategy. The effective portion of the change in the fair value of the derivative that qualifies as a cash flow hedge is recorded in accumulated other comprehensive income (“AOCI”) and is subsequently reclassified into earnings in the period that the hedged forecasted transaction affects earnings. Amounts reported in AOCI related to derivatives will be reclassified to interest expense as interest payments are made on our variable-rate debt. We do not use interest rate derivatives for trading or speculative purposes. Derivatives not designated as hedges are not speculative and are used to manage our exposure to interest rate movements and other identified risks but we have elected not to apply hedge accounting. Changes in the fair value of interest rate derivatives not designated in hedging relationships are recorded in other income (expense) within our consolidated statements of operations and was approximately $0.6 million and none for the years ended December 31, 2019 and 2018, respectively. A majority of this expense was attributable to the early termination of approximately $75.7 million of an interest rate swap in connection with the payoff of the Senior Term Loan. This settlement resulted in the recognition of an expense of approximately $0.6 million reclassified out of accumulated other comprehensive income. Foreign Currency Hedges Our objectives in using foreign currency derivatives are to add stability to potential fluctuations in exchange rates between foreign currencies and the U.S. dollar and to manage our exposure to exchange rate movements. To accomplish this objective, we use foreign currency forwards and foreign currency options as part of our exchange rate risk management strategy. A foreign currency forward contract is a commitment to deliver a certain amount of currency at a certain price on a specific date in the future. By entering into the forward contract and holding it to maturity, we are locked into a future currency exchange rate in an amount equal to and for the term of the forward contract. A foreign currency option contract is a commitment by the seller of the option to deliver, solely at the option of the buyer, a certain amount of currency at a certain price on a specific date. For derivatives designated as net investment hedges, the changes in the fair value of the derivatives are reported in accumulated other comprehensive income. Amounts are reclassified out of accumulated other comprehensive income into earnings when the hedged net investment is either sold or substantially liquidated. The following table summarizes the terms of our derivative financial instruments as of December 31, 2019: Notional Amount Strike Effective Date or Date Assumed Maturity Date Interest Rate Swaps: LIBOR Swap $ 85,512,000 (3) 2.61 % January 24, 2019 August 1, 2020 LIBOR Swap 235,000,000 1.79 % June 15, 2019 February 15, 2022 Interest Rate Caps: CDOR Cap $ 99,300,000 (1) 3.00 % October 11, 2018 October 15, 2021 CDOR Cap 1,000,000 (1) 3.00 % March 28, 2019 October 15, 2021 CDOR Cap 11,700,000 (1) 3.00 % May 28, 2019 October 15, 2021 Foreign Currency Forward: Denominated in CAD $ 95,000,000 (1) 1.323 December 9, 2020 February 10, 2020 (2) (1) Notional amounts shown are denominated in CAD. (2) We settled this forward on February 10, 2020, receiving a net settlement of approximately $0.5 million and simultaneously entered into another $95 million CAD foreign currency forward with a maturity date of February 10, 2021. (3) We entered into this Swap on January 24, 2019 for an initial notional amount of approximately $161 million, however, on October 29, 2019, in connection with the settlement of the Senior Term Loan, we terminated approximately $75.7 million of this interest rate swap which required a settlement payment of approximately $0.6 million. On March 28, 2018 we settled our then existing $101 million CAD foreign currency forward contract, receiving a net settlement of approximately $2.2 million and simultaneously entered into a $90 million CAD foreign currency forward. We settled the $90 million CAD foreign currency forward on January 25, 2019, receiving a net settlement of approximately $2.1 million and simultaneously entered into a $95 million CAD foreign currency forward. On July 8, 2019 we settled the $95 million CAD foreign currency forward, paying a net settlement of approximately $0.6 million and simultaneously entered into a $95 million CAD currency option. On December 9, 2019 the CAD currency option expired and we simultaneously entered into a two month $95 million CAD foreign currency forward. A portion of our gain (loss) from our settled and unsettled foreign currency hedges is recorded net in foreign currency hedge contract gain (loss) in our consolidated statements of comprehensive loss, the other portion, a loss of approximately $0.4 million and a gain of approximately $1.0 million related to the ineffective portion is recorded in other income (expense) within our consolidated statements of operations for the years ended December 31, 2019 and 2018, respectively. The following table summarizes the terms of our derivative financial instruments as of December 31, 2018: Notional Amount Strike Effective Date or Date Assumed Maturity Date Interest Rate Swaps: Oakland and Concord loan $ 19,483,127 (2) 3.95 % May 18, 2016 April 10, 2023 Interest Rate Cap: CDOR Cap $ 99,300,000 (1) 3.00 % October 11, 2018 October 15, 2021 Foreign Currency Forward: Denominated in CAD $ 90,000,000 (1) 1.2846 March 28, 2018 January 28, 2019 (3) (1) Notional amount shown is denominated in CAD. (2) The Oakland and Concord loan interest rate swap was settled on January 24, 2019 in conjunction with the SSGT Mergers. (3) We settled this foreign currency forward on January 25, 2019 and received a settlement of approximately $2.1 million The following table presents a gross presentation of the fair value of our derivative financial instruments as well as their classification on our consolidated balance sheets as of December 31, 2019 and 2018: Asset/Liability Derivatives Fair Value Balance Sheet Location December 31, 2019 December 31, 2018 Interest Rate Swaps Other assets $ — $ 361,802 Accounts payable and accrued liabilities 1,695,140 — Interest Rate Caps Other assets $ 28,847 $ 87,808 Foreign Currency Hedges Other assets $ 4,016,806 Accounts payable and accrued liabilities $ 1,425,632 —

Segment Disclosures

Segment Disclosures	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Segment Reporting [Abstract]
Segment Disclosures	Note 10. Segment Disclosures Prior to the Self Administration Transaction on June 28, 2019, we internally evaluated all of our properties and interests therein as one industry segment and, accordingly, did not report segment information. Subsequent to the Self Administration Transaction, we now operate in two reportable business segments: (i) self storage operations and (ii) our Managed REIT Platform business. Management evaluates performance based upon net operating income (“NOI”). For our self storage operations, NOI is defined as leasing and related revenues, less property level operating expenses. NOI for the Company’s Managed REIT Platform business represents Managed REIT Platform revenues less Managed REIT Platform expenses. The following tables summarize information for the reportable segments for the periods presented: Three Months Ended September 30, 2020 Managed REIT Corporate Self Storage Platform and Other Total Revenues: Self storage rental revenue $ 26,706,201 $ — $ — $ 26,706,201 Ancillary operating revenue 1,431,952 — — 1,431,952 Managed REIT Platform revenue — 2,051,021 — 2,051,021 Reimbursable costs from Managed REITs — 1,173,948 — 1,173,948 Total revenues 28,138,153 3,224,969 — 31,363,122 Operating expenses: Property operating expenses 9,816,774 — — 9,816,774 Managed REIT Platform expense — 329,280 — 329,280 Reimbursable costs from Managed REITs — 1,173,948 — 1,173,948 General and administrative — — 4,012,072 4,012,072 Depreciation 7,863,351 — 140,236 8,003,587 Intangible amortization expense 561,601 1,026,298 — 1,587,899 Other acquisition expenses 468,577 — — 468,577 Contingent earnout expense — 1,600,000 — 1,600,000 Total operating expenses 18,710,303 4,129,526 4,152,308 26,992,137 Operating income (loss) 9,427,850 (904,557 ) (4,152,308 ) 4,370,985 Other income (expense): Interest expense (8,048,225 ) — (45,251 ) (8,093,476 ) Interest expense – accretion of fair market value of secured debt 32,788 — — 32,788 Interest expense – debt issuance costs (950,120 ) — (2,359 ) (952,479 ) Other (139,829 ) 325,514 — 185,685 Net income (loss) $ 322,464 $ (579,043 ) $ (4,199,918 ) $ (4,456,497 ) Nine Months Ended September 30, 2020 Managed Corporate Self Storage Platform and Other Total Revenues: Self storage rental revenue $ 77,221,013 $ — $ — $ 77,221,013 Ancillary operating revenue 3,768,213 — — 3,768,213 Managed REIT Platform revenue — 5,687,701 — 5,687,701 Reimbursable costs from Managed REITs — 4,453,863 — 4,453,863 Total revenues 80,989,226 10,141,564 — 91,130,790 Operating expenses: Property operating expenses 28,686,843 — — 28,686,843 Managed REIT Platform expense — 2,512,103 — 2,512,103 Reimbursable costs from Managed REITs — 4,453,863 — 4,453,863 General and administrative — — 11,829,732 11,829,732 Depreciation 23,185,178 — 377,523 23,562,701 Intangible amortization expense 4,950,285 3,525,397 — 8,475,682 Other acquisition expenses 593,903 — — 593,903 Contingent earnout adjustment — (5,100,000 ) — (5,100,000 ) Impairment of goodwill and intangible assets — 36,465,732 — 36,465,732 Impairment of investments in Managed REITs — 4,376,879 — 4,376,879 Total operating expenses 57,416,209 46,233,974 12,207,255 115,857,438 Operating income (loss) 23,573,017 (36,092,410 ) (12,207,255 ) (24,726,648 ) Other income (expense): Interest expense (24,581,790 ) — (135,418 ) (24,717,208 ) Interest expense – accretion of fair market value of secured debt 98,337 — — 98,337 Interest expense – debt issuance costs (2,825,162 ) — (7,078 ) (2,832,240 ) Other (544,296 ) 3,312,206 146,930 2,914,840 Net loss $ (4,279,894 ) $ (32,780,204 ) $ (12,202,821 ) $ (49,262,919 ) Three Months Ended September 30, 2019 Managed REIT Corporate Self Storage Platform and Other Total Revenues: Self storage rental revenue $ 25,669,615 $ — $ — $ 25,669,615 Ancillary operating revenue 1,188,934 — — 1,188,934 Managed REIT Platform revenue — 1,192,665 — 1,192,665 Reimbursable costs from Managed REITs — 1,536,800 — 1,536,800 Total revenues 26,858,549 2,729,465 — 29,588,014 Operating expenses: Property operating expenses 9,655,599 — — 9,655,599 Managed REIT Platform expense — 1,248,665 — 1,248,665 Reimbursable costs from Managed REITs — 1,536,800 — 1,536,800 General and administrative — — 3,519,557 3,519,557 Depreciation 7,470,184 — 169,006 7,639,190 Intangible amortization expense 2,503,987 1,237,059 — 3,741,046 Self administration transaction expenses — — 107,100 107,100 Other acquisition expenses 25,529 — — 25,529 Contingent earnout adjustment — 300,000 — 300,000 Total operating expenses 19,655,299 4,322,524 3,795,663 27,773,486 Operating income (loss) 7,203,250 (1,593,059 ) (3,795,663 ) 1,814,528 Other income (expense): Interest expense (10,214,822 ) — (46,114 ) (10,260,936 ) Interest expense – accretion of fair market value of secured debt 33,191 — — 33,191 Interest expense – debt issuance costs (1,082,543 ) — — (1,082,543 ) Other (106,450 ) 60,631 — (45,819 ) Net loss $ (4,167,374 ) $ (1,532,428 ) $ (3,841,777 ) $ (9,541,579 ) Nine Months Ended September 30, 2019 Managed Corporate Self Storage Platform and Other Total Revenues: Self storage rental revenue $ 74,056,235 $ — $ — $ 74,056,235 Ancillary operating revenue 2,589,985 — — 2,589,985 Managed REIT Platform revenue — 1,221,727 — 1,221,727 Reimbursable costs from Managed REITs — 1,583,909 — 1,583,909 Total revenues 76,646,220 2,805,636 — 79,451,856 Operating expenses: Property operating expenses 26,630,201 — — 26,630,201 Property operating expenses – affiliates 6,605,670 — — 6,605,670 Managed REIT Platform expense — 1,259,234 — 1,259,234 Reimbursable costs from Managed REITs — 1,583,909 — 1,583,909 General and administrative — — 7,000,627 7,000,627 Depreciation 21,750,206 — 177,902 21,928,108 Intangible amortization expense 6,524,347 1,298,007 — 7,822,354 Self administration transaction expenses — — 1,595,371 1,595,371 Acquisition expenses – affiliates 84,061 — — 84,061 Other acquisition expenses 109,765 — — 109,765 Contingent earnout adjustment — 300,000 — 300,000 Total operating expenses 61,704,250 4,441,150 8,773,900 74,919,300 Operating income (loss) 14,941,970 (1,635,514 ) (8,773,900 ) 4,532,556 Other income (expense): Interest expense (28,537,117 ) — (47,623 ) (28,584,740 ) Interest expense – accretion of fair market value of secured debt 98,850 — — 98,850 Interest expense – debt issuance costs (2,997,801 ) — — (2,997,801 ) Net loss on extinguishment of debt (1,487,867 ) — — (1,487,867 ) Gain resulting from acquisition of unconsolidated affiliates 8,017,353 — — 8,017,353 Other (414,871 ) 62,652 — (352,219 ) Net loss $ (10,379,483 ) $ (1,572,862 ) $ (8,821,523 ) $ (20,773,868 ) The following table summarizes our total assets by segment as of September 30, 2020: Segments September 30, 2020 Self Storage $ 1,158,358,937 (1) Managed REIT Platform 37,895,289 (1) Corporate and Other 33,512,424 Total assets $ 1,229,766,650 (1) Included in the assets of the Self Storage and the Managed REIT Platform segments as of September 30, 2020, are approximately $45.3 million and $8.4 million of goodwill, respectively.	Note 9. Segment Disclosures Prior to the Self Administration Transaction on June 28, 2019, we internally evaluated all of our properties and interests therein as one industry segment and, accordingly, did not report segment information. Subsequent to the Self Administration Transaction, we now operate in two reportable business segments: (i) self storage operations and (ii) our Managed REIT Platform business. Management evaluates performance based upon net operating income (“NOI”). For our self storage operations, NOI is defined as leasing and related revenues, less property level operating expenses. NOI for the Company’s Managed REIT Platform business represents Managed REIT Platform revenues less Managed REIT Platform expenses. The following table summarizes information for the reportable segments for the year ended December 31, 2019 below: Year Ended December 31, 2019 Self Storage Managed REIT Corporate and Other Total Revenues: Self storage rental revenue $ 99,494,560 $ — $ — $ 99,494,560 Ancillary operating revenue 3,706,700 — — 3,706,700 Managed REIT Platform revenue — 3,068,306 — 3,068,306 Reimbursable costs from Managed REITs — 3,258,983 — 3,258,983 Total revenues 103,201,260 6,327,289 — 109,528,549 Operating expenses: Property operating expenses 35,723,111 — — 35,723,111 Property operating expenses – affiliates 6,605,670 — — 6,605,670 Managed REIT Platform expense — 2,739,556 — 2,739,556 Reimbursable costs from Managed REITs — 3,258,983 — 3,258,983 General and administrative — — 10,461,453 10,461,453 Depreciation 29,305,979 — 299,299 29,605,278 Intangible amortization expense 9,051,083 2,442,311 — 11,493,394 Contingent earnout expense — — 200,000 200,000 Self administration transaction expenses — — 1,572,238 1,572,238 Acquisition expenses – affiliates 84,061 — — 84,061 Other property acquisition expenses 141,489 — — 141,489 Total operating expenses 80,911,393 8,440,850 12,532,990 101,885,233 Gain on sale of real estate 3,944,696 — — 3,944,696 Operating income (loss) 26,234,563 (2,113,561 ) (12,532,990 ) 11,588,012 Other income (expense): Interest expense (37,469,725 ) — (93,522 ) (37,563,247 ) Interest expense – accretion of fair market value of secured debt 131,611 — — 131,611 Interest expense – debt issuance costs (3,990,421 ) — (6,255 ) (3,996,676 ) Net loss on extinguishment of debt (2,635,278 ) — (12,355 ) (2,647,633 ) Gain resulting from acquisition of unconsolidated affiliates 8,017,353 — — 8,017,353 Other (1,159,570 ) 534,612 — (624,958 ) Net loss $ (10,871,467 ) $ (1,578,949 ) $ (12,645,122 ) $ (25,095,538 ) The following table summarizes our total assets by segment: Segments December 31, 2019 Self Storage $ 1,175,887,634 (1) Managed REIT Platform 73,939,002 (1) Corporate and Other 61,607,095 Total assets $ 1,311,433,731 (1) Included in the assets of the Self Storage and the Managed REIT Platform segments are approximately $45.3 million, and $33.1 million of goodwill, respectively.

Related Party Transactions

Related Party Transactions	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Related Party Transactions [Abstract]
Related Party Transactions	Note 11. Related Party Transactions Through the closing of the Self Administration Transaction on June 28, 2019, we incurred expenses under the following advisory and property management agreements; commencing on such closing and continuing thereafter we no longer incur such expenses. The Former Dealer Manager Agreement and the Transfer Agent Agreement described below were not impacted by the Self Administration Transaction. Fees to Affiliates Our Advisory Agreement with our Former External Advisor, our dealer manager agreement, as amended (“Former Dealer Manager Agreement”) with our Former Dealer Manager, our Property Management Agreements with our Former External Property Managers and our Transfer Agent Agreement with our Transfer Agent entitle such affiliates to specified fees upon the provision of certain services with regard to our Offering and investment of funds in real estate properties, among other services, as well as certain reimbursements, as described below. Advisory Agreement Prior to the Self Administration Transaction we did not have any employees. Our Former External Advisor was primarily responsible for managing our business affairs and carrying out the directives of our board of directors. Our Former External Advisor received various fees and expenses under the terms of our Advisory Agreement. As a result of the Self Administration Transaction, on June 28, 2019, we acquired approximately 350 self storage professionals and other personnel and now perform such services on our own behalf. Our Former External Advisor received acquisition fees equal to 1.75% of the contract purchase price of each property we acquired plus reimbursement of any acquisition expenses incurred by our Former External Advisor. Our Former External Advisor also received a monthly asset management fee equal to 0.05208%, which is one-twelfth Pursuant to the Advisory Agreement, our Former External Advisor was entitled to reimbursement of our Former External Advisor’s direct and indirect costs of providing administrative and management services to us. Former Dealer Manager Agreement In connection with our Primary Offering, our Former Dealer Manager received a sales commission of up to 7.0% of gross proceeds from sales of Class A Shares and up to 2.0% of gross proceeds from the sales of Class T Shares in the Primary Offering and a dealer manager fee up to 3.0% of gross proceeds from sales of both Class A Shares and Class T Shares in the Primary Offering under the terms of the Former Dealer Manager Agreement. In addition, our Former Dealer Manager receives an ongoing stockholder servicing fee that is payable monthly and accrues daily in an amount equal to 1/365th of 1% of the purchase price per share of the Class T Shares sold in the Primary Offering. We will cease paying the stockholder servicing fee with respect to the Class T Shares sold in the Primary Offering at the earlier of (i) the date we list our shares on a national securities exchange, merge or consolidate with or into another entity, or sell or dispose of all or substantially all of our assets; (ii) the date at which the aggregate underwriting compensation from all sources equals 10% of the gross proceeds from the sale of both Class A Shares and Class T Shares in our Primary Offering (i.e., excluding proceeds from sales pursuant to our distribution reinvestment plan), which calculation shall be made by us with the assistance of our Former Dealer Manager commencing after the termination of the Primary Offering; (iii) the fifth anniversary of the last day of the fiscal quarter in which our Primary Offering (i.e., excluding our distribution reinvestment plan offering) terminated; and (iv) the date that such Class T Share is redeemed or is no longer outstanding. Our Former Dealer Manager entered into participating dealer agreements with certain other broker-dealers which authorized them to sell our shares. Upon sale of our shares by such broker-dealers, our Former Dealer Manager re-allowed Affiliated Former Dealer Manager SAM owns a 15% non-voting Transfer Agent Agreement SAM owns 100% of the membership interests of Strategic Transfer Agent Services, LLC, our transfer agent (“Transfer Agent”), which is a registered transfer agent with the SEC. Pursuant to our transfer agent agreement, our Transfer Agent provides transfer agent and registrar services to us. These services are substantially similar to what a third party transfer agent would provide in the ordinary course of performing its functions as a transfer agent, including, but not limited to: providing customer service to our stockholders, processing the distributions and any servicing fees with respect to our shares and issuing regular reports to our stockholder. Our Transfer Agent may retain and supervise third party vendors in its efforts to administer certain services. We believe that our Transfer Agent, through its knowledge and understanding of the direct participation program industry which includes non-traded non-traded Fees paid to our Transfer Agent are based on a fixed quarterly fee, one-time out-of-pocket The initial term of the transfer agent agreement is three years, which term will be automatically renewed for one year successive terms, but either party may terminate the transfer agent agreement upon 90 days’ prior written notice. In the event that we terminate the transfer agent agreement, other than for cause, we will pay our transfer agent all amounts that would have otherwise accrued during the remaining term of the transfer agent agreement; provided, however, that when calculating the remaining months in the term for such purposes, such term is deemed to be a 12 month period starting from the date of the most recent annual anniversary date. Property Management Agreements As a result of the Self Administration Transaction, we now perform property management services on our own behalf. Through June 28, 2019, pursuant to the property management agreements, our Former External Property Managers received: (i) a monthly management fee for each property equal to the greater of $3,000 or 6% of the gross revenues from the properties plus reimbursement of the property manager’s costs of managing the properties and (ii) a construction management fee equal to 5% of the cost of construction or capital improvement work in excess of $10,000. In addition, we had agreed with our Former External Property Managers or an affiliate to share equally in the net revenue attributable to the sale of tenant insurance, protection plans, or other indemnity plans at our properties. With respect to each new property we acquired for which we entered into a property management agreement with our Former External Property Managers we paid our Former External Property Managers a one-time start-up Our self storage properties located in Canada were subject to separate property management agreements with our Former External Property Managers on terms substantially the same as the amended property management agreements described above. All of our properties in the United States and Canada are operated under the “SmartStop ® Pursuant to the terms of the agreements described above, the following table summarizes related party costs incurred and paid by us for the year ended December 31, 2019, and the nine months ended September 30, 2020, as well as any related amounts payable as of December 31, 2019 and September 30, 2020: Year Ended December 31, 2019 Nine Months Ended September 30, 2020 Incurred Paid Payable Incurred Paid Payable Expensed Operating expenses $ 975,985 $ 1,185,370 $ — $ — $ — $ — Transfer Agent fees 324,943 374,404 — 465,520 438,520 27,000 Asset management fees 3,622,559 3,622,559 — — — — Property management fees 2,983,110 2,983,110 — — — — Acquisition expenses 84,061 84,061 — — — — Capitalized Acquisition costs 235,932 235,932 — — — — Self Administration Transaction working capital true-up 493,785 493,785 — — — — Additional paid-in Stockholder servicing fee (1) — 667,651 1,277,340 — 485,675 791,665 Total $ 8,720,375 $ 9,646,872 $ 1,277,340 $ 465,520 $ 924,195 $ 818,665 (1) We pay our Former Dealer Manager an ongoing stockholder servicing fee that is payable monthly and accrues daily in an amount equal to 1/365 th Please see Note 3 – Real Estate Facilities and Note 4 – Self Administration Transaction for detail regarding additional related party transactions. Tenant Programs We may offer a tenant insurance plan, tenant protection plan or similar program (collectively “Tenant Programs”) to customers at our properties. We and an affiliate of our Former External Property Manager previously agreed to transfer our respective rights in such Tenant Programs revenue to a joint venture owned 50% by our TRS subsidiary and, through the date of the Self Administration Transaction, 50% by our Former External Property Manager’s affiliate (the “Former PM Affiliate”). Under the terms of the joint venture agreement, the TRS received 50% of the net economics generated from such Tenant Programs and the Former PM Affiliate received the other 50% of such net economics. In addition, we shared equally in the net revenue attributable to the sale of Tenant Programs at the properties we acquired in the SSGT Mergers on substantially similar terms as set forth above. In connection with the Self Administration Transaction we now wholly-own For the three and nine months ended September 30, 2020, we recorded net revenues of approximately $1.2 million and $3.1 million, respectively, related to Tenant Programs which was included in ancillary operating revenue in the consolidated statements of operations. For the three and nine months ended September 30, 2019, we recorded net revenues of approximately $1.0 million and $2.0 million, respectively, related to Tenant Programs which was included in ancillary operating revenue in the consolidated statements of operations. Acquisition of Self Storage Platform from SmartStop Asset Management, LLC and Other Transactions As a result of the Self Administration Transaction, the advisor and property manager entities of SST IV and SSGT II, became our indirect subsidiaries. As a result, we are entitled to receive various fees and expense reimbursements under the terms of the SST IV and SSGT II advisory and property management agreements as described below. Investment in Managed REIT On September 21, 2020, a wholly owned subsidiary of our Operating Partnership (the “Preferred Investor”), entered into a preferred unit purchase agreement (the “SSGT II Unit Purchase Agreement”) with SS Growth Operating Partnership II, L.P. (the “SSGT II OP”) and SSGT II. Pursuant to the terms of the SSGT II Unit Purchase Agreement, the Preferred Investor agreed to purchase, in one or more tranches, up to 1.6 million units of limited partnership interest in SSGT II OP (the “SSGT II Preferred Units”) for an aggregate of up to $40 million (the “SSGT II Investment”). Upon the closing of each tranche of the SSGT II Investment, the Preferred Investor will be due an investment fee equal to 1% of the investment amount of such tranche. The Preferred Investor will receive distributions, payable monthly in arrears, at a rate of 7.25% per annum from the date of investment until 180 days after the date of investment, 8.25% per annum from 181 days after the date of investment until 360 days after the date of investment, and 9.25% per annum thereafter (collectively, the “Pay Rate”). The proceeds of the SSGT II Investment may be used by SSGT II OP to finance self-storage acquisition, development, and improvement activities, and working capital or other general partnership purposes. Each SSGT II Preferred Unit has a liquidation preference of $25.00, plus all accumulated and unpaid distributions. The foregoing distributions shall be payable monthly, and calculated on an actual/360 day basis, and any unpaid distributions shall accrue at the applicable Pay Rate. On September 21, 2020, the Preferred Investor invested approximately $6.5 million in the SSGT II Operating Partnership. Such investment is included in investments in and advances to Managed REITs in our consolidated balance sheets. As of September 30, 2020, we were potentially required to purchase an additional $33.5 million in SSGT II Preferred Units. For the three months ended September 30, 2020, we recorded income related to the SSGT II Preferred Units, totaling approximately $13,000 which is recorded within the Other line item in our consolidated statements of operations. Subsequent to September 30, 2020, on October 29, 2020, and November 4, 2020, the Preferred Investor made additional preferred investments into SSGT II Operating Partnership of approximately $13 million and $13 million, respectively, increasing the total investment in SSGT II Preferred Units to approximately $32.5 million, and decreasing our potential requirement to purchase additional units to $7.5 million. On November 12, 2020, SSGT II redeemed $19 million of our SSGT II Preferred Units, reducing our investment in SSGT II Preferred Units to $13.5 million. See Note 16 - Subsequent Events, for additional information. Advisory Agreement Fees Our indirect subsidiaries, Strategic Storage Advisor IV, LLC, the advisor to SST IV (the “SST IV Advisor”), and SS Growth Advisor II, LLC, the advisor to SSGT II (the “SSGT II Advisor”), are entitled to receive various fees and expense reimbursements under the terms of the SST IV and SSGT II advisory agreements. SST IV Advisory Agreement The SST IV Advisor provides acquisition and advisory services to SST IV pursuant to an advisory agreement (the “SST IV Advisory Agreement”). SST IV is required to reimburse SST IV Advisor for organization and offering costs under the SST IV Advisory Agreement; however, the SST IV Advisor funds, and will not be reimbursed for 1.15% of the gross offering proceeds from the sale of Class W shares sold in the SST IV offering. Such amounts for the three and nine months ended September 30, 2020 totaled approximately none and $25,000, respectively. The SST IV Advisor will be required to reimburse SST IV within 60 days after the end of the month in which the SST IV public offering terminates to the extent SST IV paid or reimbursed organization and offering costs (excluding sales commissions and dealer manager fees) in excess of 3.5% of the gross offering proceeds from the SST IV offering. The SST IV Advisory Agreement also requires the SST IV Advisor to reimburse SST IV to the extent that offering expenses, including sales commissions, dealer manager fees and organization and offering expenses, are in excess of 15% of gross proceeds from the SST IV offering. Effective as of April 30, 2020, SST IV suspended its offering due to various factors, including the uncertainty relating to the ongoing COVID-19 non-traded Subsequent to the termination of SST IV’s primary offering, they determined that total organization and offering costs did not exceed 3.5% of the gross proceeds received from their primary offering, and thus we were not required to reimburse SST IV. Additionally, they determined that total organization and offering costs will not exceed 15% of the gross proceeds received in their primary offering, and thus we will not be required to reimburse SST IV for any excess offering costs. The SST IV Advisor also receives a monthly asset management fee equal to 0.0833%, which is one-twelfth The SST IV Advisor may potentially also be entitled to various subordinated distributions under SST IV’s operating partnership agreement pursuant to the special limited partnership interest and its cash flow participation distribution rights if SST IV (1) lists its shares of common stock on a national exchange, (2) terminates the SST IV Advisory Agreement, (3) liquidates its portfolio, or (4) enters into an Extraordinary Transaction, as defined in the SST IV operating partnership agreement. The SST IV Advisory Agreement provides for reimbursement of the SST IV Advisor’s direct and indirect costs of providing administrative and management services to SST IV. The SST IV Advisor will be required to pay or reimburse SST IV the amount by which SST IV’s aggregate annual operating expenses, as defined, exceed the greater of 2% of SST IV’s average invested assets or 25% of SST IV’s net income, as defined, unless a majority of SST IV’s independent directors determine that such excess expenses were justified based on unusual and non-recurring SSGT II Advisory Agreement The SSGT II Advisor provides acquisition and advisory services to SSGT II pursuant to an advisory agreement (the “SSGT II Advisory Agreement”). In connection with the SSGT II private placement offering, SSGT II is required to reimburse the SSGT II Advisor for organization and offering costs from the SSGT II private offering pursuant to the SSGT II Advisory Agreement. Effective as of April 30, 2020, SSGT II suspended their offering due to various factors, including the uncertainty relating to the ongoing COVID-19 non-traded The SSGT II Advisor will receive a monthly asset management fee equal to 0.1042%, which is one-twelfth The SSGT II Advisor may also be potentially entitled to various subordinated distributions under SSGT II’s operating partnership agreement pursuant to the special limited partnership interest and its cash flow participation distribution rights. So long as the SSGT II Advisory Agreement has not been terminated (including by means of non-renewal), distribution equal to 5.0% (reflective of the weighted average purchase price per share), cumulative within the subject calendar year (as adjusted for partial periods outstanding). Such distribution will be reconciled and paid annually. The cash flow participation distribution may be payable in cash or operating partnership units (or any combination thereof), at the election of the SSGT II Advisor. The SSGT II Advisor may also be potentially entitled to various subordinated distributions under SSGT II’s operating partnership agreement if SSGT II (1) lists its shares of common stock on a national exchange, (2) terminates the SSGT II Advisory Agreement, (3) liquidates its portfolio, or (4) merges with another entity or enters into an Extraordinary Transaction, as defined in the SSGT II operating partnership agreement. The SSGT II Advisory Agreement provides for reimbursement of the SSGT II Advisor’s direct and indirect costs of providing administrative and management services to SSGT II. Managed REIT Property Management Agreements Our indirect subsidiaries, Strategic Storage Property Management IV, LLC and SS Growth Property Management II, LLC (collectively the “Managed REITs Property Managers”), are entitled to receive fees for their services in managing the properties owned by the Managed REITs pursuant to property management agreements entered into between the owner of the property and the applicable Managed REIT’s Property Manager. The Managed REIT’s Property Managers will receive a property management fee equal to 6% of the gross revenues from the properties, generally subject to a monthly minimum of $3,000 per property, plus reimbursement of the costs of managing the properties, and a one-time on-site The SST IV property manager will be entitled to a construction management fee equal to 5% of the cost of a related construction or capital improvement work project in excess of $10,000. Summary of Fees and Revenue Related to the Managed REITs Pursuant to the terms of the various agreements described above for the Managed REITs, the following summarizes the related party fees for the three and nine months ended September 30, 2020 and 2019: Managed REIT Platform Revenues Three Months Ended September 30, Three Months Ended September 30, Nine Months Ended September 30, Nine Months Ended September 30, Property management agreement – SST IV $ 367,256 $ 288,026 $ 1,039,753 $ 296,300 Property management agreement – SSGT II 90,069 40,222 241,624 40,822 Advisory agreement – SST IV 813,052 490,844 2,358,906 506,470 Advisory agreement – SSGT II 281,839 117,380 788,932 121,942 Tenant Program revenue – SST IV 252,885 120,498 610,635 120,498 Tenant Program revenue – SSGT II 73,011 15,895 152,624 15,895 Other Managed REIT revenue (1) 172,909 119,800 495,227 119,800 Total $ 2,051,021 $ 1,192,665 $ 5,687,701 $ 1,221,727 (1) Such revenues primarily includes construction management and development fees. Reimbursable costs from Managed REITs includes reimbursement of both the SST IV and SSGT II Advisors’ direct and indirect costs of providing administrative and management services to the Managed REITs. Additionally, reimbursable costs includes reimbursement pursuant to the property management agreements for reimbursement of the costs of managing the Managed REITs’ properties, including wages and salaries and other expenses of employees engaged in operating, managing and maintaining such properties. As of September 30, 2020, we had receivables due from SST IV and SSGT II totaling approximately $314,000 and $6,000, respectively, and as of December 31, 2019, we had receivables due from SST IV and SSGT II totaling approximately $100,000 and $175,000, respectively. Such amounts are included in investments in and advances to the Managed REITs line-item in our consolidated balance sheets. Such amounts included unpaid amounts relative to the above table, in addition to other direct routine expenditures of the Managed REITs that we directly funded. Administrative Services Agreement For the three and nine months ended September 30, 2020, we incurred fees payable to SAM under the Administrative Services Agreement of approximately $82,000 and $1.9 million, respectively, which were recorded in the Managed REIT Platform expenses line item in our consolidated statement of operations for the three and nine months ended September 30, 2020. We recorded reimbursements from SAM of approximately $0.1 million and $0.3 million, respectively, related to services provided to SAM as well as reimbursements of rent and overhead for the portion of the Ladera Office occupied by SAM, which were included in Managed REIT Platform revenue in our consolidated statement of operations for the three and nine months ended September 30, 2020, respectively. As of September 30, 2020, a receivable of approximately $37,000 was due from SAM related to the Administrative Services Agreement and included in the other assets line in our consolidated balance sheet. As of December 31, 2019, a payable of approximately $0.3 million was due to SAM related to the Administrative Services Agreement and included in the due to affiliates line in our consolidated balance sheet.	Note 10. Related Party Transactions Through the closing of the Self Administration Transaction on June 28, 2019, we incurred expenses under the following advisory and property management agreements; commencing on such closing and continuing thereafter we will no longer incur such expenses. The Dealer Manager Agreement and the Transfer Agent Agreement described below were not impacted by the Self Administration Transaction. Fees to Affiliates Our Advisory Agreement with our Former External Advisor, our dealer manager agreement, as amended (“Dealer Manager Agreement”) with our Dealer Manager, our Property Management Agreements with our Former External Property Managers and our Transfer Agent Agreement with our Transfer Agent entitle such affiliates to specified fees upon the provision of certain services with regard to the Offering and investment of funds in real estate properties, among other services, as well as certain reimbursements, as described below. Advisory Agreement Prior to the Self Administration Transaction we did not have any employees. Our Former External Advisor was primarily responsible for managing our business affairs and carrying out the directives of our board of directors. Our Former External Advisor received various fees and expenses under the terms of our Advisory Agreement. As a result of the Self Administration Transaction, on June 28, 2019 we acquired approximately 350 self storage professionals and other personnel and now perform such services on our own behalf. Our Advisory Agreement also required our Former External Advisor to reimburse us to the extent that offering expenses, including sales commissions, dealer manager fees, stockholder servicing fees and organization and offering expenses, were in excess of 15% of gross proceeds from the Offering. However, subsequent to the termination of our Primary Offering on January 9, 2017, we determined offering expenses were not in excess of 15% of gross proceeds from the Offering, and thus there was no reimbursement. Our Former External Advisor received acquisition fees equal to 1.75% of the contract purchase price of each property we acquired plus reimbursement of any acquisition expenses incurred by our Former External Advisor. Our Former External Advisor also received a monthly asset management fee equal to 0.05208%, which is one-twelfth Under our Advisory Agreement, our Former External Advisor was entitled to receive disposition fees in an amount equal to the lesser of (i) one-half Our Former External Advisor was also entitled to various subordinated distributions pursuant to our Operating Partnership Agreement if we (1) listed our shares of common stock on a national exchange, (2) terminated our Advisory Agreement (other than a voluntary termination), (3) liquidated our portfolio, or (4) entered into an Extraordinary Transaction, as it was defined in the Operating Partnership Agreement. Pursuant to the Advisory Agreement, our Former External Advisor was entitled to reimbursement of our Former External Advisor’s direct and indirect costs of providing administrative and management services to us. Pursuant to the Advisory Agreement, our Former External Advisor was obligated to pay or reimburse us the amount by which our aggregate annual operating expenses, as defined, exceeded the greater of 2% of our average invested assets or 25% of our net income, as defined, unless a majority of our independent directors determined that such excess expenses were justified based on unusual and non-recurring Dealer Manager Agreement In connection with our Primary Offering, our Dealer Manager received a sales commission of up to 7.0% of gross proceeds from sales of Class A Shares and up to 2.0% of gross proceeds from the sales of Class T Shares in the Primary Offering and a dealer manager fee up to 3.0% of gross proceeds from sales of both Class A Shares and Class T Shares in the Primary Offering under the terms of the Dealer Manager Agreement. In addition, our Dealer Manager receives an ongoing stockholder servicing fee that is payable monthly and accrues daily in an re-allowed re-allow non-accountable Affiliated Dealer Manager SAM owns a 15% non-voting Transfer Agent Agreement SAM owns 100% of the membership interests of Strategic Transfer Agent Services, LLC, our transfer agent (“Transfer Agent”), which is a registered transfer agent with the SEC. Pursuant to our transfer agent agreement, our Transfer Agent provides transfer agent and registrar services to us. These services are substantially similar to what a third party transfer agent would provide in the ordinary course of performing its functions as a transfer agent, including, but not limited to: providing customer service to our stockholders, processing the distributions and any servicing fees with respect to our shares and issuing regular reports to our stockholder. Our Transfer Agent may retain and supervise third party vendors in its efforts to administer certain services. We believe that our Transfer Agent, through its knowledge and understanding of the direct participation program industry which includes non-traded non-traded It is the duty of our board of directors to evaluate the performance of our Transfer Agent. Fees paid to our Transfer Agent are based on a fixed quarterly fee, one-time out-of-pocket The initial term of the transfer agent agreement is three years, which term will be automatically renewed for one year successive terms, but either party may terminate the transfer agent agreement upon 90 days’ prior written notice. In the event that we terminate the transfer agent agreement, other than for cause, we will pay our transfer agent all amounts that would have otherwise accrued during the remaining term of the transfer agent agreement; provided, however, that when calculating the remaining months in the term for such purposes, such term is deemed to be a 12 month period starting from the date of the most recent annual anniversary date. Property Management Agreements From inception through June 28, 2019, our Former External Property Managers served as the property manager for each of our properties pursuant to separate property management agreements. From October 1, 2015 through September 30, 2017, our Former External Property Managers contracted with Extra Space for Extra Space to serve as the sub-property sub-property sub-property ® ® sub-property Pursuant to the amended property management agreements, our Former External Property Managers received: (i) a monthly management fee for each property equal to the greater of $3,000 or 6% of the gross revenues from the properties plus reimbursement of the property manager’s costs of managing the properties and (ii) a construction management fee equal to 5% of the cost of construction or capital improvement work in excess of $10,000. In addition, we had agreed with our Former External Property Managers or an affiliate to share equally in the net revenue attributable to the sale of tenant insurance, protection plans, or other indemnity plans at our properties. With respect to each new property we acquired for which we entered into a property management agreement with our Former External Property Managers we paid our Former External Property Managers a one-time start-up Our self storage properties located in Canada were subject to separate property management agreements with our Former External Property Managers on terms substantially the same as the amended property management agreements described above. All of our properties in the United States and Canada are operated under the “SmartStop ® Prior Arrangements (effective between October 1, 2015 and September 30, 2017) Under the property management agreements in effect for properties we owned between October 1, 2015 through September 30, 2017 for our properties located in the United States, our Former External Property Manager received a monthly management fee for each property equal to the greater of $2,500 or 6% of the gross revenues, plus reimbursement of our Former External Property Manager’s costs of managing the properties. In addition, Extra Space agreed to pay up to $25,000 per property toward the signage and set-up “Set-Up Set-Up Set-Up The sub-property sub-property sub-property sub-property Set-Up Set-Up sub-property sub-property Termination of Sub-property As of October 1, 2017, our Former External Property Manager terminated each sub-property sub-property Pursuant to the terms of the agreements described above, the following table summarizes related party costs incurred and paid by us for the years ended December 31, 2018 and 2019, as well as any related amounts payable as of December 31, 2018 and 2019: Year Ended December 31, 2018 Year Ended December 31, 2019 Incurred Paid Payable Incurred Paid Payable Expensed Operating expenses $ 2,199,596 $ 2,336,075 $ 209,385 $ 975,985 $ 1,185,370 $ — Transfer Agent fees 352,300 302,839 49,461 324,943 374,404 — Asset management fees 5,445,528 5,445,528 — 3,622,558 3,622,558 — Property management fees 4,809,106 4,809,106 — 2,983,111 2,983,111 — Acquisition expenses 72,179 72,179 — 84,061 84,061 — Capitalized Acquisition costs 48,664 48,664 — 235,932 235,932 — Self Administration Transaction working capital true-up — — — 493,785 493,785 — Additional paid-in Stockholder servicing fee (1) — 675,049 1,944,991 — 667,651 1,277,340 Total $ 12,927,373 $ 13,689,440 $ 2,203,837 $ 8,720,375 $ 9,646,872 $ 1,277,340 (1) We pay our Dealer Manager an ongoing stockholder servicing fee that is payable monthly and accrues daily in an amount equal to 1/365 th Please see Note 3 – Real Estate Facilities and Note 4 – Self Administration Transaction for detail regarding additional related party transactions. Tenant Programs We may offer a tenant insurance plan, tenant protection plan or similar program (collectively “Tenant Programs”) to customers at our properties. We and an affiliate of our Former External Property Manager previously agreed to transfer our respective rights in such Tenant Programs revenue to a joint venture owned 50% by our TRS subsidiary and, through the date of the Self Administration Transaction, 50% by our Former External Property Manager’s affiliate (the “Former PM Affiliate”). Under the terms of the joint venture agreement, the TRS received 50% of the net economics generated from such Tenant Programs and the Former PM Affiliate received the other 50% of such net economics. In addition, we share equally in the net revenue attributable to the sale of Tenant Programs at the properties we acquired in the SSGT Mergers on substantially similar terms as set forth above. In connection with the Self Administration Transaction we now wholly-own For the years ended December 31, 2019, 2018 and 2017, we recorded net revenues of approximately $2.9 million, $1.5 million, and $0.3 million, respectively, related to Tenant Programs which was included in ancillary operating revenue in the consolidated statements of operations. Storage Auction Program In connection with the Self Administration Transaction we now own a minority interest in a company that owns 50% of an online auction company (the “Auction Company”) that serves as a web portal for self storage companies to post their auctions for the contents of abandoned storage units online instead of using live auctions conducted at the self storage facilities. The Auction Company receives a service fee for such services. During the years ended December 31, 2019, 2018 and 2017 we paid approximately $45,000, $43,000, and none, respectively, in fees to the Auction Company related to our properties. Our properties receive the proceeds from such online auctions. Toronto Merger On February 1, 2017, we entered into a definitive Agreement and Plan of Merger (the “Toronto Merger Agreement”) pursuant to which SST II Toronto Acquisition, LLC, a wholly owned and newly formed subsidiary of our Operating Partnership, merged (the “Toronto Merger”) with and into SS Toronto, a subsidiary of our Sponsor, with SS Toronto surviving the Toronto Merger and becoming a wholly owned subsidiary of our Operating Partnership. In connection with the Toronto Merger, we acquired five self storage properties located in the Greater Toronto Areas of North York, Mississauga, Brampton, Pickering and Scarborough (the “SS Toronto Properties”). Each property is operated under the “SmartStop” brand. At the effective time of the Toronto Merger, each share of common stock, $0.001 par value per share, of SS Toronto issued and outstanding was automatically converted into the right to receive $11.0651 USD in cash and 0.7311 Class A Units of our Operating Partnership. We paid an aggregate of approximately $7.3 million USD in cash consideration and issued an aggregate of approximately 483,197 Class A Units of our Operating Partnership to the common stockholders of SS Toronto, consisting of Strategic 1031 and SS Toronto REIT Advisors, Inc., affiliates of our Sponsor. We acquired the SS Toronto Properties subject to approximately $50.1 million CAD (approximately $38.4 million USD) in outstanding debt (as described further below), approximately $0.8 million in other net liabilities, and paid approximately $33.1 million USD to an affiliate of Extra Space as repayment of outstanding debt and accrued interest owed by SS Toronto. No acquisition fee was paid to our Advisor for the Toronto Merger. The terms of the Toronto Merger and the execution of the Toronto Merger Agreement were recommended by a special committee (the “Special Committee”) of our board of directors consisting of the Nominating and Corporate Governance Committee, the members of which were all of our independent directors. The Special Committee, with the assistance of its independent financial advisor and independent legal counsel, approved the transaction and determined that the Toronto Merger and the other transactions contemplated by the Toronto Merger Agreement were advisable and in the best interests of us, were fair and reasonable to us and were on terms and conditions not less favorable to us than those available from unaffiliated third parties. In connection with the Toronto Merger, we entered into guarantees, dated as of February 1, 2017 (the “Guarantees”), under which we agreed to guarantee certain obligations of SS Toronto. The SS Toronto loans consist of (i) term loans totaling approximately $34.8 million CAD pursuant to promissory notes executed by SS Toronto in favor of Bank of Montreal on June 3, 2016, and (ii) mortgage financings in the aggregate amount of up to $17.7 million CAD pursuant to two promissory notes executed by subsidiaries of SS Toronto in favor of DUCA Financial Services Credit Union Ltd. on June 3, 2016. These loans were paid off in full on October 11, 2018 in conjunction with the Canadian CitiBank loan. Please see Note 6 for more information. Acquisition of Self Storage Platform from SmartStop Asset Management, LLC and Other Transactions As a result of the Self Administration Transaction, the advisor and property manager entities of SST IV and SSGT II, became our indirect subsidiaries. As a result, we are entitled to receive various fees and expense reimbursements under the terms of the SST IV and SSGT II advisory and property management agreements as described below. Advisory Agreement Fees Our indirect subsidiaries, Strategic Storage Advisor IV, LLC, the advisor to SST IV (the “SST IV Advisor”), and SS Growth Advisor II, LLC, the advisor to SSGT II (the “SSGT II Advisor”), are entitled to receive various fees and expense reimbursements under the terms of the SST IV and SSGT II advisory agreements. SST IV Advisory Agreement The SST IV Advisor provides acquisition and advisory services to SST IV pursuant to an advisory agreement (the “SST IV Advisory Agreement”). SST IV is required to reimburse SST IV Advisor for organization and offering costs under the SST IV Advisory Agreement; however, the SST IV Advisor funds, and will not be reimbursed for 1.15% of the gross offering proceeds from the sale of class W shares sold in the SST IV offering. Such amounts for the year ended December 31, 2019 totaled approximately $41,000. The SST IV Advisor will be required to reimburse SST IV within 60 days after the end of the month in which the SST IV public offering terminates to the extent SST IV paid or reimbursed organization and offering costs (excluding sales commissions and dealer manager fees) in excess of 3.5% of the gross offering proceeds from the SST IV offering. The SST IV Advisory Agreement also requires the SST IV Advisor to reimburse SST IV to the extent that offering expenses, including sales commissions, dealer manager fees and organization and offering expenses, are in excess of 15% of gross proceeds from the SST IV offering. The SST IV Advisor also receives a monthly asset management fee equal to 0.0833%, which is one-twelfth The SST IV Advisor may potentially also be entitled to various subordinated distributions under the SST IV’s operating partnership agreement pursuant to the special limited partnership interest and its cash flow participation distribution rights if SST IV (1) lists its shares of common stock on a national exchange, (2) terminates the SST IV Advisory Agreement, (3) liquidates its portfolio, or (4) enters into an Extraordinary Transaction, as defined in the SST IV operating partnership agreement. The SST IV Advisory Agreement provides for reimbursement of the SST IV Advisor’s direct and indirect costs of providing administrative and management services to SST IV. The SST IV Advisor will be required to pay or reimburse SST IV the amount by which SST IV’s aggregate annual operating expenses, as defined, exceed the greater of 2% of SST IV’s average invested assets or 25% of SST IV’s net income, as defined, unless a majority of SST IV’s independent directors determine that such excess expenses were justified based on unusual and non-recurring SSGT II Advisory Agreement The SSGT II Advisor provides acquisition and advisory services to SSGT II pursuant to an advisory agreement (the “SSGT II Advisory Agreement”). In connection with the SSGT II private placement offering, SSGT II is required to reimburse the SSGT II Advisor for organization and offering costs from the SSGT II private offering pursuant to the SSGT II Advisory Agreement. The SSGT II Advisor will receive a monthly asset management fee equal to 0.1042%, which is one-twelfth The SSGT II Advisor may also be potentially entitled to various subordinated distributions under SSGT II’s operating partnership agreement pursuant to the special limited partnership interest and its cash flow participation distribution rights. So long as the SSGT II Advisory Agreement has not been terminated (including by means of non-renewal), The SSGT II Advisor may also be potentially entitled to various subordinated distributions under SSGT II’s operating partnership agreement if SSGT II (1) lists its shares of common stock on a national exchange, (2) terminates the SSGT II Advisory Agreement, (3) liquidates its portfolio, or (4) merges with another entity or enters into an Extraordinary Transaction, as defined in the SSGT II operating partnership agreement. The SSGT II Advisory Agreement provides for reimbursement of the SSGT II Advisor’s direct and indirect costs of providing administrative and management services to SSGT II. Property Management Agreements Our indirect subsidiaries, Strategic Storage Property Management IV, LLC and SS Growth Property Management II, LLC (collectively the “Managed REITs Property Managers”), are entitled to receive fees for their services in managing the properties owned by the Managed REITs pursuant to property management agreements entered into between the owner of the property and the applicable Managed REIT’s Property Manager. The Managed REIT’s Property Managers will receive a property management fee equal to 6% of the gross revenues from the properties, generally subject to a monthly minimum of $3,000 per property, plus reimbursement of the costs of managing the properties, and a one-time on-site The SST IV property manager will be entitled to a construction management fee equal to 5% of the cost of a related construction or capital improvement work project in excess of $10,000. Summary of Fees and Revenue Related to the Managed REITs Pursuant to the terms of the various agreements described above for the Managed REITs, the following summarizes the related party fees for year ended December 31, 2019: Managed REIT Platform Revenues Year Ended December 31, 2019 Advisory agreement – SST IV $ 1,153,137 Property management agreement – SST IV 602,162 Tenant Program revenue – SST IV 254,148 Advisory agreement – SSGT II 310,786 Property management agreement – SSGT II 91,594 Tenant Program revenue – SSGT II 37,269 Other Managed REIT revenue (1) 619,210 Total $ 3,068,306 (1) Such revenues primarily includes construction management, development, and acquisitions related fees. Reimbursable costs from affiliates includes reimbursement of both the SST IV and SSGT II Advisors’ direct and indirect costs of providing administrative and management services to the Managed REITs. Additionally, reimbursable costs includes reimbursement pursuant to the property management agreements for reimbursement of the costs of managing the Managed REITs’ properties, including wages and salaries and other expenses of employees engaged in operating, managing and maintaining such properties. As of December 31, 2019 we had receivables due from SST IV and SSGT II totaling approximately $100,000 and $170,000 respectively, which are included in investments in and advances to the Managed REITs line-item in our consolidated balance sheet. Such amounts included unpaid amounts relative to the above table, in addition to other direct routine expenditures of the Managed REITs that we directly funded. Administrative Services Agreement In connection with the Self Administration Transaction, on June 28, 2019, we along with our Operating Partnership, the TRS and SSA (collectively, the “Company Parties”) entered into an Administrative Services Agreement with SAM (the “Administrative Services Agreement”), pursuant to which the Company Parties will be reimbursed for providing certain operational and administrative services to SAM which may include, without limitation, accounting and financial support, IT support, HR support, advisory services and operations support, and administrative support as set forth in the Administrative Services Agreement and SAM will be reimbursed for providing certain operational and administrative services to the Company Parties which may include, without limitation, due diligence support, marketing, fulfillment and offering support, events support, insurance support, and administrative and facilities support. For the year ended December 31, 2019, we incurred fees to SAM under the Administrative Services Agreement of approximately $2.1 million, which were recorded in our Managed REIT Platform expenses in our consolidated statement of operations for the year ended December 31, 2019, and recorded reimbursements of approximately $0.2 million, which were included in Managed REIT Platform revenue in our consolidated statement of operations for the year ended December 31, 2019. For the year ended December 31, 2019, we recorded reimbursements from SAM of approximately $0.1 million to the Company Parties as an allocation of rent and overhead for the portion of our Ladera Office occupied by SAM. As of December 31, 2019, approximately $0.3 million was included in due to affiliates on our consolidated balance sheet for amounts we owed SAM.

Equity Based Compensation

Equity Based Compensation	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Share-based Payment Arrangement [Abstract]
Stock Based Compensation	Note 12. Equity Based Compensation We issue equity based compensation pursuant to the employee and director long-term incentive plan of SmartStop Self Storage REIT, Inc. (the “Plan”). Pursuant to the Plan, we are able to issue various forms of equity based compensation. Through September 30, 2020, we have issued equity based awards in two forms: (1) restricted stock awards consisting of shares of our common stock and (2) long-term incentive plan units of our Operating Partnership (“LTIP Units”). Through March 2020, we had only issued restricted stock, which shares are subject to a time based vesting period. In April 2020 the Compensation Committee of the Board of Directors approved the 2020 executive compensation program for our executive officers, which included (1) performance based awards, and (2) time based awards. For both such awards the recipient could choose either LTIP Units or restricted stock consisting of shares of our common stock. The fair value of the restricted stock and the LTIP Units was determined based on an estimated value per share, adjusted for an illiquidity discount due to the illiquid nature of the underlying equity. The fair value of the LTIP Units was further adjusted by applying an additional discount as the LTIP Units are not initially economically equivalent to our restricted stock. For the performance based awards, a fair value was determined for each performance ranking scenario, with stock compensation expense recorded using the fair value of the scenario determined to be probable of achievement. Time Based Awards We have granted various time based awards, which generally vest ratably over either one, three, or four years commencing in the year of grant, subject to the recipient’s continued employment or service through the applicable vesting date. All grants of time based restricted stock have limitations on transferability during the vesting period, and the grantee does not have the ability to vote any unvested shares. Transferability during the vesting period depends upon when the grant was made, as follows (i) with respect to grants of time based restricted stock made prior to April 2020, the restriction on transfers applies to the entirety of the grant, regardless of vesting, and (ii) with respect to grants of time based restricted stock made in or subsequent to April 2020, the restriction on transfer applies only to the unvested portion of the restricted stock. With respect to grants of time based restricted stock made to our executive officers in 2020, distributions began to accrue effective January 1, 2020 and are payable as distributions are paid on our Class A Shares without regard to whether the underlying restricted shares have vested. With respect to all other outstanding grants of time based restricted stock, distributions accrue on non-vested Holders of time based LTIP Units receive allocations of profits and losses with respect to the LTIP Units as of the effective date, distributions from the effective date in an amount equivalent to the distributions declared and paid on our Class A Shares, and the same voting rights as holders of common units, voting as a class with each LTIP Unit holder having one vote per LTIP Unit held. Prior to vesting, time based LTIP Units generally may not be transferred, other than by laws of descent and distribution. The following table summarizes the activity related to our time based awards: Restricted Stock LTIPs Time Based Award Grants Shares Weighted-Average Grant-Date Fair Value Units Weighted-Average Grant-Date Fair Value Unvested at December 31, 2018 21,438 $ 10.38 $ — $ — Granted 251,993 9.48 — — Vested (7,625 ) 10.29 — — Forfeited — — — — Unvested at December 31, 2019 265,806 9.53 — — Granted 72,383 9.78 214,521 9.09 Vested (81,618 ) 9.57 — — Forfeited (6,567 ) 9.78 — — Unvested at September 30, 2020 250,004 $ 9.58 214,521 $ 9.09 Performance Based Awards With respect to performance based awards, the number of shares of restricted stock granted as of the grant date equaled 100% of the targeted award, whereas the number of LTIP Units granted as of the grant date equaled 200% of the targeted award. The targeted award for each executive was determined and approved by the Compensation Committee of our Board of Directors. The actual number of shares of restricted stock or LTIP Units, as applicable, to be issued upon vesting may range from 0% to 200% of the targeted award, such determination being based upon the results of the performance measure. Performance based awards vest based upon our performance as ranked amongst a peer group of self storage related companies. This comparison will be conducted using a performance measure of average annual same-store revenue growth, analyzed over a three-year period. Earned awards for the 2020 grant will vest, as applicable, no later than March 31, 2023. Recipients of performance based restricted stock accrue distributions during the performance period, and such distributions will only be payable on the date that any such shares of restricted stock vest, based upon the performance level attained. Recipients of performance based LTIP Units are issued LTIP Units at 200% of the targeted award and are entitled to receive distributions and allocations of profits and losses with respect to the performance based LTIP Units as of the effective date of January 1, 2020 in an amount equal to 10% of the distributions and allocations available to such LTIP Units, until the Distribution Participation Date (as defined in the Partnership Agreement). The remaining 90% of distributions will accrue and will be payable on the Distribution Participation Date based upon the performance level attained and number of performance based LTIP Units that vest. Following the Distribution Participation Date, recipients will be entitled to receive the full amount of distributions and allocations of profits and losses with respect to the vested performance-based LTIP Units, such amount being equivalent to distributions declared and paid on our Class A Shares. The following table summarizes our activity related to our performance based awards: Restricted Stock LTIPs Performance Based Award Grants Shares Weighted-Average Grant-Date Fair Value Units Weighted-Average Grant-Date Fair Value Unvested at December 31, 2019 — $ — — $ — Granted 5,752 9.78 130,638 9.09 Vested — — — — Forfeited — — — — Unvested at September 30, 2020 5,752 $ 9.78 130,638 $ 9.09 Holders of performance based restricted stock do not have any rights as a stockholder with respect to the unvested portion of such restricted stock awards. Prior to vesting, shares of performance based restricted stock generally may not be transferred, other than by laws of descent and distribution. Holders of performance based LTIP Units have the same voting rights as holders of common units, voting as a class with each LTIP Unit holder having one vote per LTIP Unit held. Prior to vesting, performance based LTIP Units generally may not be transferred, other than by laws of descent and distribution. LTIP Units are designed to qualify as “profits interests” in the Operating Partnership for federal income tax purposes. The profits interests’ characteristics of the LTIP Units mean that initially they will not be treated as economically equivalent in value to a common unit and the issuance of LTIP Units will not be a taxable event to the Operating Partnership or the recipient. If and when certain events occur pursuant to applicable tax regulations and in accordance with the Partnership Agreement, LTIP Units may increase in value over time and become equivalent to common units of limited partnership interest of our Operating Partnership on a one-for-one As of September 30, 2020, 5,330,483 shares of stock were available for issuance under the Plan. We recorded approximately $0.5 million and $1.2 million of equity based compensation expense, primarily in general and administrative expense and to a lesser extent, in property operating expenses, within our consolidated statements of operations for the three and nine months ended September 30, 2020, respectively. As of September 30, 2020, there was approximately $4.2 million of total unrecognized compensation expense related to non-vested	Note 11. Stock Based Compensation We issue stock based compensation pursuant to the employee and director long-term incentive plan of SmartStop Self Storage REIT, Inc. (the “Plan”). Pursuant to the Plan, we are able to issue various forms of stock based compensation. Through December 31, 2019 we had only issued restricted stock grants, which are subject to a vesting period over which the restrictions are released and the stock is issued in book entry form to the grantee. During the vesting period, the grantee is not permitted to sell, transfer, pledge, encumber or assign shares of non-vested non-vested As of December 31, 2019, 5,630,071 shares were available for issuance under the Plan. We recorded approximately $405,000 of expense in general and administrative expense in our consolidated statements of operations related to restricted stock granted to employees and directors for the year ended December 31, 2019. As of December 31, 2019, there was approximately $2.2 million of total unrecognized compensation expense related to non-vested Restricted Stock Grants Shares Weighted-Average Grant-Date Fair Value Non-Vested 21,438 $ 10.38 Granted 251,993 9.48 Vested (7,625 ) 10.29 Non-Vested 265,806 $ 9.53

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 13. Commitments and Contingencies Distribution Reinvestment Plan We have adopted an amended and restated distribution reinvestment plan that allows both our Class A and Class T stockholders to have distributions otherwise distributable to them invested in additional shares of our Class A and Class T Shares, respectively. The purchase price per share pursuant to our distribution reinvestment plan is equivalent to the estimated value per share approved by our board of directors and in effect on the date of purchase of shares under the plan. In conjunction with the board of directors’ declaration of a new estimated value per share of our common stock on April 20, 2020, beginning in May 2020, shares sold pursuant to our distribution reinvestment plan are sold at the estimated value per share of $10.40 per Class A Share and Class T Share. On November 30, 2016, we filed with the SEC a Registration Statement on Form S-3, Share Redemption Program As described in Note 2 – Redeemable Common Stock, we have an SRP; please refer to Note 2 for additional details. Pursuant to the SRP, we may redeem the shares of stock presented for redemption for cash to the extent that such requests comply with the below terms of our SRP and we have sufficient funds available to fund such redemption. Our board of directors may amend, suspend or terminate the SRP with 30 days’ notice to our stockholders. We may provide this notice by including such information in a Current Report on Form 8-K On August 20, 2020, our board of directors determined that it would be in the best interests of the Company to amend the terms of the SRP to revise the redemption price per share for all redemptions under the SRP to be equal to the most recently published estimated net asset value per share of the applicable share class (the “SRP Amendment”). Prior to the SRP Amendment, the redemption amount was the lesser of the amount the stockholders paid for their shares or the price per share in the current offering. There are several limitations in addition to those noted above on our ability to redeem shares under the SRP including, but not limited to: • During any calendar year, we will not redeem in excess of 5% of the weighted-average number of shares outstanding during the prior calendar year. • The cash available for redemption is limited to the proceeds from the sale of shares pursuant to our distribution reinvestment plan, less any prior redemptions. • We have no obligation to redeem shares if the redemption would violate the restrictions on distributions under Maryland law, which prohibits distributions that would cause a corporation to fail to meet statutory tests of solvency. For the year ended December 31, 2019, we received redemption requests totaling approximately $4.9 million (approximately 0.5 million shares), approximately $4.5 million of which were fulfilled during the year ended December 31, 2019, with the remaining approximately $0.4 million included in accounts payable and accrued liabilities as of December 31, 2019 and fulfilled in January 2020. During the six months ended June 30, 2020, approximately 0.1 million shares, or $1.3 million, were requested to be redeemed; however, due to the suspension of our SRP, no share redemption requests were fulfilled. During the three months ended September 30, 2020, approximately $0.7 million (approximately $0.1 million shares), were then requested to be redeemed. On October 30, 2020, requests that were previously requested during the six months ended June 30, 2020 and had not been rescinded, as well as the requests from the three months ended September 30, 2020, were redeemed, such redemptions totaled approximately 0.1 million shares, or $1.3 million, and were included in accounts payable and accrued liabilities as of September 30, 2020. Operating Partnership Redemption Rights Generally, the limited partners of our Operating Partnership, excluding any limited partners with respect to their A-2 Additionally, the Class A-1 Lock-Up Class A-1 Class A-1 Other Contingencies From time to time, we are party to legal proceedings that arise in the ordinary course of our business. We are not aware of any legal proceedings of which the outcome is reasonably likely to have a material adverse effect on our results of operations or financial condition, nor are we aware of any such legal proceedings contemplated by governmental authorities.	Note 12. Commitments and Contingencies Distribution Reinvestment Plan We have adopted an amended and restated distribution reinvestment plan that allows both our Class A and Class T stockholders to have distributions otherwise distributable to them invested in additional shares of our Class A and Class T Shares, respectively. The purchase price per share pursuant to our distribution reinvestment plan is equivalent to the estimated value per share approved by our board of directors and in effect on the date of purchase of shares under the plan. In conjunction with the board of directors’ declaration of a new estimated value per share of our common stock on June 26, 2019, beginning in July 2019, shares sold pursuant to our distribution reinvestment plan are sold at the estimated value per share of $10.66 per Class A Share and Class T Share. On November 30, 2016, we filed with the SEC a Registration Statement on Form S-3, Share Redemption Program We adopted a share redemption program that enables stockholders to sell their shares to us in limited circumstances. On August 26, 2019, our board of directors approved the suspension of our share redemption program effective as of September 27, 2019, except with respect to redemption requests made in connection with the death or disability of a stockholder, redemption due to confinement to a long-term care facility, or other exigent circumstances. We may redeem the shares of stock presented for redemption for cash to the extent that such requests comply with the foregoing terms of our share redemption program and we have sufficient funds available to fund such redemption. We are not obligated to redeem shares under the share redemption program. Our board of directors may amend, suspend or terminate the share redemption program with 30 days’ notice to our stockholders. We may provide this notice by including such information in a Current Report on Form 8-K The amount that we may pay to redeem stock for redemptions is the redemption price set forth in the following table which is based upon the number of years the stock is held: Number Years Held Redemption Price Less than 1 No Redemption Allowed 1 or more but less than 3 90.0% of Redemption Amount 3 or more but less than 4 95.0% of Redemption Amount 4 or more 100.0% of Redemption Amount At any time we are engaged in an offering of shares, the Redemption Amount for shares purchased under our share redemption program will always be equal to or lower than the applicable per share offering price. As long as we are engaged in an offering, the Redemption Amount shall be the lesser of the amount the stockholder paid for their shares or the price per share in the current offering. If we are no longer engaged in an offering, our board of directors will announce any redemption price adjustment and the time period of its effectiveness as a part of its regular communications with our stockholders. At any time the redemption price during an offering is determined by any method other than the offering price, if we have sold property and have made one or more special distributions to our stockholders of all or a portion of the net proceeds from such sales, the per share redemption price will be reduced by the net sale proceeds per share distributed to investors prior to the redemption date as a result of the sale of such property in the special distribution. Our board of directors will, in its sole discretion, determine which distributions, if any, constitute a special distribution. While our board of directors does not have specific criteria for determining a special distribution, we expect that a special distribution will only occur upon the sale of a property and the subsequent distribution of the net sale proceeds. There are several limitations in addition to those noted above on our ability to redeem shares under the share redemption program including, but not limited to: • During any calendar year, we will not redeem in excess of 5% of the weighted-average number of shares outstanding during the prior calendar year. • The cash available for redemption is limited to the proceeds from the sale of shares pursuant to our distribution reinvestment plan, less any prior redemptions. • We have no obligation to redeem shares if the redemption would violate the restrictions on distributions under Maryland law, which prohibits distributions that would cause a corporation to fail to meet statutory tests of solvency. For the year ended December 31, 2019, we received redemption requests totaling approximately $4.9 million (approximately 0.5 million shares), approximately $4.5 million of which were fulfilled during the year ended December 31, 2019, with the remaining approximately $0.4 million included in accounts payable and accrued liabilities as of December 31, 2019 and fulfilled in January 2020. For the year ended December 31, 2018, we received redemption requests totaling approximately $8.3 million (approximately 0.9 million shares), approximately $7.0 million of which were fulfilled during year ended December 31, 2018, with the remaining approximately $1.3 million included in accounts payable and accrued liabilities as of December 31, 2018 and fulfilled in January 2019. For the year ended December 31, 2017 we received redemption requests totaling approximately $2.2 million (approximately 0.2 million shares), approximately $1.5 million of which were fulfilled during year ended December 31, 2017, with the remaining approximately $0.7 million included in accounts payable and accrued liabilities as of December 31, 2017 and fulfilled in January 2018. Operating Partnership Redemption Rights Generally, the limited partners of our Operating Partnership, excluding any limited partners with respect to their A-2 Additionally, the Class A-1 Lock-Up Class A-1 Class A-1 Other Contingencies From time to time, we are party to legal proceedings that arise in the ordinary course of our business. We are not aware of any legal proceedings of which the outcome is reasonably likely to have a material adverse effect on our results of operations or financial condition, nor are we aware of any such legal proceedings contemplated by governmental authorities

Declaration of Distributions

Declaration of Distributions	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Dividends [Abstract]
Declaration of Distributions	Note 14. Declaration of Distributions On March 30, 2020, our board of directors changed its distribution authorizations from a quarterly to monthly authorization starting with the second quarter of 2020. This change in the distribution policy was in order to give our board maximum flexibility to monitor and evaluate the situation related to the financial impact of COVID-19. For the months of April, May, June, July, August, and September 2020, our board of directors authorized a daily distribution rate of approximately $0.00164 per day per share on the outstanding shares of common stock payable to Class A and Class T stockholders of record of such shares as shown on our books at the close of business on each day of the period. After the stockholder servicing fee is paid, approximately $0.0014 per day will be paid per Class T share. On September 25, 2020, our board of directors changed its distribution authorizations back to quarterly from monthly authorizations, starting with the fourth quarter of 2020. In connection with this, the board of directors authorized a daily distribution rate of approximately $0.00164 per day per share on the outstanding shares of common stock payable to Class A and Class T stockholders of record of such shares as shown on the Company’s books at the close of business on each day of the period commencing on October 1, 2020 and ending December 31, 2020. Such distributions payable to each stockholder of record during a month will be paid the following month.	Note 13. Declaration of Distributions On December 18, 2019, our board of directors declared a distribution rate for the first quarter of 2020 of $0.001639 per day per share on the outstanding shares of common stock payable to both Class A and Class T stockholders of record of such shares as shown on our books at the close of business on each day during the period, commencing on January 1, 2020 and continuing on each day thereafter through and including March 31, 2020. In connection with this distribution, after the stockholder servicing fee is paid, approximately $0.0014 per day will be paid per Class T share. Such distributions payable to each stockholder of record during a month will be paid the following month.

Selected Quarterly Data (Unaudi

Selected Quarterly Data (Unaudited)	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Data (Unaudited)	Note 15. Selected Quarterly Data The following is a summary of quarterly financial information for the periods shown below: Three months ended September 30, 2019 December 31, 2019 March 31, 2020 June 30, 2020 September 30, 2020 Total revenues $ 29,588,014 $ 30,076,693 $ 30,298,123 $ 29,469,545 $ 31,363,122 Total operating expenses $ 27,773,486 $ 26,965,933 $ 61,368,274 $ 27,497,027 $ 26,992,137 Operating income (loss) $ 1,814,528 $ 7,055,456 $ (31,070,151 ) $ 1,972,518 $ 4,370,985 Net loss $ (9,541,579 ) $ (4,321,670 ) $ (37,743,581 ) $ (7,062,841 ) $ (4,456,497 ) Net loss attributable to common stockholders $ (8,214,826 ) $ (5,431,504 ) $ (35,073,951 ) $ (8,491,421 ) $ (6,259,114 ) Net loss per Class A Share-basic and diluted $ (0.14 ) $ (0.09 ) $ (0.59 ) $ (0.14 ) $ (0.10 ) Net loss per Class T Share-basic and diluted $ (0.14 ) $ (0.09 ) $ (0.59 ) $ (0.14 ) $ (0.10 )	Note 14. Selected Quarterly Data (Unaudited) The following is a summary of quarterly financial information for the years ended December 31, 2019 and 2018: Three months ended March 31, 2019 June 30, 2019 September 30, 2019 December 31, 2019 Total revenues $ 23,883,325 $ 25,980,517 $ 29,588,014 $ 30,076,693 Total operating expenses $ 21,934,203 $ 25,211,611 $ 27,773,486 $ 26,965,933 Operating income $ 1,949,122 $ 768,906 $ 1,814,528 $ 7,055,456 Net loss $ (8,948,317 ) $ (2,283,972 ) $ (9,541,579 ) $ (4,321,670 ) Net loss attributable to common stockholders $ (8,891,558 ) $ (2,212,445 ) $ (8,214,826 ) $ (5,431,504 ) Net loss per Class A Share-basic and diluted $ (0.15 ) $ (0.04 ) $ (0.14 ) $ (0.09 ) Net loss per Class T Share-basic and diluted $ (0.15 ) $ (0.04 ) $ (0.14 ) $ (0.09 ) Three months ended March 31, 2018 June 30, 2018 September 30, 2018 December 31, 2018 Total revenues $ 19,866,457 $ 20,045,516 $ 20,313,069 $ 20,187,215 Total operating expenses $ 16,010,116 $ 16,605,713 $ 15,836,436 $ 15,808,549 Operating income $ 3,856,341 $ 3,439,803 $ 4,476,633 $ 4,378,666 Net loss $ (667,047 ) $ (1,437,330 ) $ (457,278 ) $ (1,159,075 ) Net loss attributable to common stockholders $ (661,203 ) $ (1,427,056 ) $ (451,424 ) $ (1,158,694 ) Net loss per Class A Share-basic and diluted $ (0.01 ) $ (0.02 ) $ (0.01 ) $ (0.02 ) Net loss per Class T Share-basic and diluted $ (0.01 ) $ (0.02 ) $ (0.01 ) $ (0.02 )

Subsequent Events

Subsequent Events	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Subsequent Events [Abstract]
Subsequent Events	Note 16. Subsequent Events Issuance of Series A Preferred Stock We entered into a Purchase Agreement with Extra Space Storage LP (the “Investor”) on October 29, 2019, in which the Investor agreed to purchase up to 200,000 shares of Series A Preferred Stock. At the close of the transaction, we issued 150,000 shares, with the remaining 50,000 shares issuable at our discretion until October 28, 2020. On October 26, 2020, we exercised our option to issue an additional 50,000 shares of Series A Preferred Stock for $50 million in proceeds. We may use the proceeds to pay down existing debt, finance acquisitions and capital improvement projects, working capital or other general partnership purposes. Investment in Managed REIT Subsequent to September 30, 2020, on October 29, 2020, and November 4, 2020, the Preferred Investor invested an additional approximately $13 million and $13 million, respectively, in SSGT II Preferred Units in the SSGT II Operating Partnership. SSGT II utilized the funds to purchase through its operating partnership, self storage facilities located in Las Vegas, Nevada, and Olympia, Washington. On November 12, 2020, SSGT II redeemed $19 million of our SSGT II Preferred Units, reducing our investment in SSGT II Preferred Units to $13.5 million. Potential SST IV Merger On November 10, 2020, the Company, SST IV, and SST IV Merger Sub, entered into the SST IV Merger Agreement. The SST IV Merger Agreement provides that the Company will acquire SST IV by way of a merger of SST IV with and into SST IV Merger Sub, with SST IV Merger Sub being the surviving entity. The SST IV Merger is expected to close during the first half of 2021. At the effective time of the SST IV Merger (the “SST IV Merger Effective Time”), SST IV shall cease to exist as a separate entity in accordance with the applicable provisions of the Maryland General Corporation Law. The special committee of the board of directors of the Company (the “Committee”), the board of directors of the Company, the special committee of the board of directors of SST IV, “roll-up Pursuant to the terms and subject to the conditions set forth in the SST IV Merger Agreement, at the SST IV Merger Effective Time, each share of SST IV’s Class A Common Stock, $0.001 par value per share (“SST IV Class A Common Stock”), Class T Common Stock, $0.001 par value per share (“SST IV Class T Common Stock”), and Class W Common Stock, $0.001 par value per share (collectively with the SST IV Class A Common Stock and the SST IV Class T Common Stock, the “SST IV Common Stock”), issued and outstanding immediately prior to the SST IV Merger Effective Time (other than shares owned by the Company, any subsidiary of the Company, or any subsidiary of SST IV) will be converted into the right to receive 2.1875 shares of the Company’s Class A Common Stock, $0.001 par value per share (the “SmartStop Common Stock”), subject to the treatment of fractional shares in accordance with the SST IV Merger Agreement (the “SST IV Merger Consideration”). This exchange ratio represents an increase of $0.10 per share from SST IV’s most recent estimated Net Asset Value (NAV), when compared to SmartStop’s most recent estimated NAV of $10.40 per share. The transaction values SST IV at approximately $370 million, based on September 30, 2020 share counts and debt principal balances outstanding, and using the agreed exchange ratio and SmartStop’s estimated NAV per share of $10.40. Immediately prior to the SST IV Merger Effective Time, each restricted share of SST IV Common Stock granted under SST IV’s Employee and Director Long-Term Incentive Plan will become fully vested and non-forfeitable, Assuming all of the conditions of the SST IV Merger are satisfied and the SST IV Merger is consummated in accordance with the terms in the SST IV Merger Agreement, the Company will acquire all of the real estate owned by SST IV, consisting of (i) 24 self storage facilities located in 9 states comprising approximately 18,000 self storage units and approximately 2.0 million net rentable square feet, and (ii) SST IV’s 50% equity interest in five unconsolidated real estate ventures located in the Greater Toronto Area of Ontario, Canada (the “JV Properties”). The unconsolidated real estate ventures consist of one operating self storage property and four parcels of land being developed into self storage facilities, with subsidiaries of SmartCentres Real Estate Investment Trust, an unaffiliated third party (“SmartCentres”), owning the other 50% of such entities. Additionally, the Company will obtain SST IV’s rights to acquire: (i) a property that will be developed into a self storage facility in San Gabriel, California, and (ii) a tract of land located in Brampton, Ontario in the Greater Toronto Area of Ontario, Canada (the “Kingspoint Land”) that will be developed into a self storage facility pursuant to a joint venture with SmartCentres. The SST IV Merger Agreement contains customary representations, warranties, and covenants. The closing of the SST IV Merger is subject to and conditioned on the approval of the SST IV Merger and the SST IV Charter Amendment by the affirmative vote of the holders of not less than a majority of all outstanding shares of SST IV Common Stock. The closing of the SST IV Merger is neither subject to a financing condition nor to the approval of our stockholders. The SST IV Merger Agreement prohibits SST IV and its subsidiaries and representatives from soliciting, providing information, or entering into discussions concerning proposals relating to alternative business combination transactions, subject to certain limited exceptions. The SST IV Merger Agreement also provides that at any time prior to receipt of the SST IV stockholder approval, SST IV and its representatives may, in certain circumstances, make an “Adverse Recommendation Change” (as that term is defined in the SST IV Merger Agreement) and terminate the SST IV Merger Agreement, subject to complying with certain conditions set forth in the SST IV Merger Agreement. In connection with the termination of the SST IV Merger Agreement and SST IV’s entry into an alternative transaction with respect to a superior proposal, as well as under other specified circumstances, SST IV will be required to pay to the Company a termination payment of approximately $7.2 million. In addition, the SST IV Merger Agreement provides for customary expense reimbursements under specified circumstances set forth in the SST IV Merger Agreement. We expect the SST IV Merger to close during the first half of 2021; however, there is no guarantee that the SST IV Merger will be consummated.	Note 15. Subsequent Events Distribution Reinvestment Plan Offering Status As of March 25, 2020, in connection with our DRP Offering, we had issued approximately 4.3 million Class A Shares of our common stock and approximately 0.7 million Class T Shares of our common stock for gross proceeds of approximately $45.2 million and approximately $6.9 million, respectively. Novel Coronavirus (COVID-19) In December 2019, COVID-19 COVID-19 COVID-19 COVID-19

Schedule III Real Estate and Ac

Schedule III Real Estate and Accumulated Depreciation	12 Months Ended
	Dec. 31, 2019
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Abstract]
Schedule III Real Estate and Accumulated Depreciation	SMARTSTOP SELF STORAGE REIT, INC. AND SUBSIDIARIES SCHEDULE III REAL ESTATE AND ACCUMULATED DEPRECIATION December 31, 2019 Initial Cost to Company Gross Carrying Amount at December 31, 2019 Description ST Encumbrance Land Building and Improvements Total Cost Capitalized Subsequent to Acquisition Land Building and Improvements Total (1) Accumulated Depreciation Date of Construction Date Acquired Morrisville NC $ 3,109,374 $ 531,000 $ 1,891,000 $ 2,422,000 $ 111,669 $ 531,000 $ 2,002,669 $ 2,533,669 $ 402,431 2004 11/3/2014 Cary NC 5,289,973 1,064,000 3,301,000 4,365,000 104,393 1,064,000 3,405,393 4,469,393 650,300 1998/2005/2006 11/3/2014 Raleigh NC 4,482,344 1,186,000 2,540,000 3,726,000 206,819 1,186,000 2,746,819 3,932,819 615,086 1999 11/3/2014 Myrtle Beach I SC 8,606,670 1,482,000 4,476,000 5,958,000 339,706 1,482,000 4,815,706 6,297,706 947,514 1998/2005-2007 11/3/2014 Myrtle Beach II SC 6,970,422 1,690,000 3,654,000 5,344,000 216,056 1,690,000 3,870,056 5,560,056 793,377 1999/2006 11/3/2014 Whittier CA 4,602,761 2,730,000 2,916,875 5,646,875 419,262 2,730,000 3,336,137 6,066,137 692,786 1989 2/19/2015 La Verne CA 3,167,492 1,950,000 2,036,875 3,986,875 291,367 1,950,000 2,328,242 4,278,242 516,456 1986 1/23/2015 Santa Ana CA 5,196,666 4,890,000 4,006,875 8,896,875 308,327 4,890,000 4,315,202 9,205,202 931,310 1978 2/5/2015 Upland CA 3,612,920 2,950,000 3,016,875 5,966,875 400,245 2,950,000 3,417,120 6,367,120 753,589 1979 1/29/2015 La Habra CA 3,662,412 2,060,000 2,356,875 4,416,875 303,463 2,060,000 2,660,338 4,720,338 518,792 1981 2/5/2015 Monterey Park CA 2,573,587 2,020,000 2,216,875 4,236,875 210,031 2,020,000 2,426,906 4,446,906 483,171 1987 2/5/2015 Huntington Beach CA 6,978,379 5,460,000 4,856,875 10,316,875 420,732 5,460,000 5,277,607 10,737,607 1,048,530 1986 2/5/2015 Chico CA 1,163,063 400,000 1,336,875 1,736,875 227,225 400,000 1,564,100 1,964,100 338,409 1984 1/23/2015 Lancaster CA 1,682,730 200,000 1,516,875 1,716,875 326,487 200,000 1,843,362 2,043,362 429,551 1980 1/29/2015 Riverside CA 2,326,127 370,000 2,326,875 2,696,875 443,806 370,000 2,770,681 3,140,681 559,516 1985 1/23/2015 Fairfield CA 2,746,809 730,000 2,946,875 3,676,875 99,100 730,000 3,045,975 3,775,975 616,798 1984 1/23/2015 Lompoc CA 2,821,047 1,000,000 2,746,875 3,746,875 150,688 1,000,000 2,897,563 3,897,563 576,227 1982 2/5/2015 Santa Rosa CA 7,324,823 3,150,000 6,716,875 9,866,875 369,705 3,150,000 7,086,580 10,236,580 1,393,470 1979-1981 1/29/2015 Vallejo CA 8,237,821 990,000 3,946,875 4,936,875 173,697 990,000 4,120,572 5,110,572 824,942 1981 1/29/2015 Federal Heights CO 2,375,619 1,100,000 3,346,875 4,446,875 344,130 1,100,000 3,691,005 4,791,005 833,053 1983 1/29/2015 Aurora CO 4,800,729 810,000 5,906,875 6,716,875 500,621 810,000 6,407,496 7,217,496 1,256,353 1984 2/5/2015 Littleton CO 2,177,650 1,680,000 2,456,875 4,136,875 281,681 1,680,000 2,738,556 4,418,556 569,293 1985 1/23/2015 Bloomingdale IL 2,375,619 810,000 3,856,874 4,666,874 292,022 810,000 4,148,896 4,958,896 808,741 1987 2/19/2015 Crestwood IL 1,633,238 250,000 2,096,875 2,346,875 289,225 250,000 2,386,100 2,636,100 500,125 1987 1/23/2015 Forestville MD 3,464,444 1,940,000 4,346,875 6,286,875 916,799 1,940,000 5,263,674 7,203,674 1,170,978 1988 1/23/2015 Warren I MI 1,954,936 230,000 2,966,875 3,196,875 414,426 230,000 3,381,301 3,611,301 661,863 1996 5/8/2015 Sterling Heights MI 2,301,381 250,000 3,286,875 3,536,875 687,046 250,000 3,973,921 4,223,921 738,112 1977 5/21/2015 Troy MI 3,414,952 240,000 4,176,875 4,416,875 223,434 240,000 4,400,309 4,640,309 838,838 1988 5/8/2015 Warren II MI 2,251,889 240,000 3,066,875 3,306,875 647,801 240,000 3,714,676 3,954,676 751,865 1987 5/8/2015 Beverly NJ 1,385,778 400,000 1,696,875 2,096,875 280,370 400,000 1,977,245 2,377,245 345,453 1988 5/28/2015 Everett WA 2,722,063 2,010,000 2,956,875 4,966,875 592,662 2,010,000 3,549,537 5,559,537 682,138 1986 2/5/2015 Foley AL 4,132,587 1,839,000 5,717,000 7,556,000 597,640 1,839,000 6,314,640 8,153,640 1,133,176 1985/1996/2006 9/11/2015 Tampa FL 1,633,238 718,244 2,257,471 2,975,715 544,520 718,244 2,801,991 3,520,235 465,819 1985 11/3/2015 Boynton Beach FL 8,166,188 1,983,491 15,232,817 17,216,308 401,381 1,983,491 15,634,198 17,617,689 1,903,280 2004 1/7/2016 Lancaster II CA 2,350,873 670,392 3,711,424 4,381,816 234,616 670,392 3,946,040 4,616,432 619,503 1991 1/11/2016 Milton (2) ONT 5,941,133 1,452,870 7,929,810 9,382,680 935,627 (3) 1,551,187 8,767,120 10,318,307 1,024,658 2006 2/11/2016 Burlington I (2) ONT 9,471,372 3,293,267 10,278,861 13,572,128 1,161,001 (3) 3,516,127 11,217,002 14,733,129 1,343,310 2011 2/11/2016 Oakville I (2) ONT 6,543,857 2,655,215 13,072,458 15,727,673 2,989,499 (3) 2,834,896 15,882,276 18,717,172 1,933,514 2016 2/11/2016 Oakville II (2) ONT 7,663,201 2,983,307 9,346,283 12,329,590 707,360 (3) 3,097,623 9,939,327 13,036,950 1,218,853 2004 2/29/2016 Burlington II (2) ONT 4,735,686 2,944,035 5,125,839 8,069,874 507,540 (3) 3,056,847 5,520,567 8,577,414 663,864 2008 2/29/2016 Xenia OH 2,705,559 275,493 2,664,693 2,940,186 26,364 275,493 2,691,057 2,966,550 400,301 2003 4/20/2016 Sidney OH 1,817,166 255,246 1,806,349 2,061,595 106,739 255,246 1,913,088 2,168,334 415,302 2003 4/20/2016 Troy OH 2,988,229 150,666 2,596,010 2,746,676 56,417 150,666 2,652,427 2,803,093 447,468 2003 4/20/2016 Greenville OH 1,897,929 82,598 1,909,466 1,992,064 48,898 82,598 1,958,364 2,040,962 286,401 2003 4/20/2016 Washington Court House OH 2,947,848 255,456 1,882,203 2,137,659 28,346 255,456 1,910,549 2,166,005 290,615 2003 4/20/2016 Richmond IN 2,988,229 223,159 2,944,379 3,167,538 23,738 223,159 2,968,117 3,191,276 462,658 2003 4/20/2016 Connersville IN 1,857,548 155,533 1,652,290 1,807,823 24,961 155,533 1,677,251 1,832,784 263,158 2003 4/20/2016 Port St. Lucie I FL 7,430,191 2,589,781 6,339,578 8,929,359 135,087 2,589,781 6,474,665 9,064,446 845,185 1999 4/29/2016 Sacramento CA 8,157,058 1,205,209 6,616,767 7,821,976 158,568 1,205,209 6,775,335 7,980,544 800,959 2006 5/9/2016 Oakland CA 13,325,887 5,711,189 6,902,446 12,613,635 82,123 5,711,189 6,984,569 12,695,758 834,038 1979 5/18/2016 Concord CA 32,628,233 19,090,003 17,202,868 36,292,871 144,116 19,090,003 17,346,984 36,436,987 2,138,426 1988/1998 5/18/2016 Pompano Beach FL 8,590,310 3,947,715 16,656,002 20,603,717 154,178 3,947,715 16,810,180 20,757,895 1,797,481 1979 6/1/2016 Lake Worth FL 10,308,370 12,108,208 10,804,173 22,912,381 149,355 12,108,208 10,953,528 23,061,736 1,626,503 1998/2003 6/1/2016 Jupiter FL 11,568,280 16,029,881 10,556,833 26,586,714 215,037 16,029,881 10,771,870 26,801,751 1,330,037 1992/2012 6/1/2016 Royal Palm Beach FL 9,678,415 11,425,394 13,275,322 24,700,716 73,709 11,425,394 13,349,031 24,774,425 1,871,748 2001/2003 6/1/2016 Port St. Lucie II FL 7,264,947 5,130,621 8,410,474 13,541,095 151,777 5,130,621 8,562,251 13,692,872 1,136,769 2002 6/1/2016 Wellington FL 14,456,568 10,233,511 11,662,801 21,896,312 65,191 10,233,511 11,727,992 21,961,503 1,359,869 2005 6/1/2016 Doral FL 14,133,517 11,335,658 11,485,045 22,820,703 207,247 11,335,658 11,692,292 23,027,950 1,371,867 1998 6/1/2016 Plantation FL 15,969,792 12,989,079 19,224,919 32,213,998 111,811 12,989,079 19,336,730 32,325,809 2,245,241 2002/2012 6/1/2016 Naples FL 14,214,280 11,789,085 12,771,305 24,560,390 167,417 11,789,085 12,938,722 24,727,807 1,476,192 2002 6/1/2016 Delray FL 11,854,625 17,096,692 12,983,627 30,080,319 173,022 17,096,692 13,156,649 30,253,341 1,541,643 2003 6/1/2016 Baltimore MD 16,293,926 3,897,872 22,427,843 26,325,715 276,571 3,897,872 22,704,414 26,602,286 2,739,385 1990/2014 6/1/2016 Sonoma CA 6,283,197 3,468,153 3,679,939 7,148,092 51,077 3,468,153 3,731,016 7,199,169 472,501 1984 6/14/2016 Las Vegas I NV 10,210,195 2,391,220 11,117,892 13,509,112 144,928 2,391,220 11,262,820 13,654,040 1,179,359 2002 7/28/2016 Las Vegas II NV 10,471,995 3,840,088 9,916,937 13,757,025 111,618 3,840,088 10,028,555 13,868,643 1,108,709 2000 9/23/2016 Las Vegas III NV 6,544,997 2,565,579 6,338,944 8,904,523 169,906 2,565,579 6,508,850 9,074,429 737,188 1989 9/27/2016 Asheville I NC 7,113,097 3,619,676 11,173,603 14,793,279 288,193 3,619,676 11,461,796 15,081,472 1,212,018 1988/2005/2015 12/30/2016 Asheville II NC 3,236,212 1,764,969 3,107,311 4,872,280 78,177 1,764,969 3,185,488 4,950,457 366,004 1984 12/30/2016 Hendersonville I NC 2,234,137 1,081,547 3,441,204 4,522,751 105,475 1,081,547 3,546,679 4,628,226 378,487 1982 12/30/2016 Asheville III NC 4,657,189 5,096,833 4,620,013 9,716,846 159,066 5,096,833 4,779,079 9,875,912 558,244 1991/2002 12/30/2016 Arden NC 6,529,921 1,790,118 10,265,741 12,055,859 199,741 1,790,118 10,465,482 12,255,600 994,253 1973 12/30/2016 Asheville IV NC 4,394,350 4,558,139 4,455,118 9,013,257 86,312 4,558,139 4,541,430 9,099,569 544,682 1985/1986/2005 12/30/2016 Asheville V NC 5,051,449 2,414,680 7,826,417 10,241,097 124,678 2,414,680 7,951,095 10,365,775 854,206 1978/2009/2014 12/30/2016 Asheville VI NC 3,474,411 1,306,240 5,121,332 6,427,572 105,933 1,306,240 5,227,265 6,533,505 513,159 2004 12/30/2016 Asheville VIII NC 4,517,556 1,764,965 6,162,855 7,927,820 143,977 1,764,965 6,306,832 8,071,797 693,448 1968/2002 12/30/2016 Hendersonville II NC 4,254,715 2,597,584 5,037,350 7,634,934 160,072 2,597,584 5,197,422 7,795,006 657,926 1989/2003 12/30/2016 Asheville VII NC 1,585,252 782,457 2,139,791 2,922,248 58,418 782,457 2,198,209 2,980,666 253,424 1999 12/30/2016 Sweeten Creek Land NC — 348,480 — 348,480 — 348,480 — 348,480 — N/A 12/30/2016 Highland Center Land NC — 50,000 — 50,000 — 50,000 — 50,000 — N/A 12/30/2016 Aurora II CO 8,560,873 1,584,664 8,196,091 9,780,755 96,060 1,584,664 8,292,151 9,876,815 962,350 2012 1/11/2017 Dufferin (2) ONT 18,426,124 6,258,511 16,287,332 22,545,843 219,635 (3 ) 6,283,048 16,482,430 22,765,478 1,539,550 2015 2/1/2017 Mavis (2) ONT 12,743,301 4,657,233 14,493,508 19,150,741 155,843 (3 ) 4,675,492 14,631,092 19,306,584 1,348,393 2013 2/1/2017 Brewster (2) ONT 9,385,269 4,136,329 9,527,410 13,663,739 107,094 (3 ) 4,152,546 9,618,287 13,770,833 897,554 2013 2/1/2017 Granite (2) ONT 6,199,444 3,126,446 8,701,429 11,827,875 109,913 (3 ) 3,138,703 8,799,085 11,937,788 782,623 1998/2016 2/1/2017 Centennial (2) ONT 4,391,273 1,714,644 11,428,538 13,143,182 170,347 (3 ) 1,721,366 11,592,163 13,313,529 1,013,267 2016/2017 2/1/2017 Initial Cost to Company Gross Carrying Amount at December 31, 2019 Description ST Encumbrance Land Building and Improvements Total Cost Capitalized Subsequent to Acquisition Land Building and Improvements Total (1) Accumulated Depreciation Date of Construction Date Acquired Ft. Pierce FL 6,479,547 1,152,931 12,398,306 13,551,237 22,461 1,152,931 12,420,767 13,573,698 358,952 2008 1/24/2019 Russell Blvd, Las Vegas II NV 13,002,835 3,433,634 15,449,497 18,883,131 6,640 3,433,634 15,456,137 18,889,771 562,583 1996 1/24/2019 Jones Blvd, Las Vegas I NV 10,902,999 1,975,283 12,565,410 14,540,693 35,094 1,975,283 12,600,504 14,575,787 362,807 1999 1/24/2019 Airport Rd, Colorado Springs CO 3,664,395 870,373 7,877,813 8,748,186 97,297 870,373 7,975,110 8,845,483 242,859 1983 1/24/2019 Riverside CA 6,461,036 1,259,685 6,995,794 8,255,479 102,225 1,259,685 7,098,019 8,357,704 223,795 1980 1/24/2019 Stockton CA 5,653,407 783,938 7,706,492 8,490,430 1,232 783,938 7,707,724 8,491,662 243,952 1984 1/24/2019 Azusa CA 9,530,028 4,384,861 9,153,677 13,538,538 135,589 4,384,861 9,289,266 13,674,127 276,663 1986 1/24/2019 Romeoville IL 3,836,240 964,701 5,755,146 6,719,847 48,208 964,701 5,803,354 6,768,055 189,896 1986 1/24/2019 Elgin IL 2,665,177 1,162,197 2,895,052 4,057,249 41,578 1,162,197 2,936,630 4,098,827 121,271 1986 1/24/2019 San Antonio I TX 9,126,214 1,602,740 9,196,093 10,798,833 88,535 1,602,740 9,284,628 10,887,368 279,444 1998 1/24/2019 Kingwood TX 6,299,510 1,016,291 9,358,519 10,374,810 64,973 1,016,291 9,423,492 10,439,783 302,752 2001 1/24/2019 Aurora CO 3,942,344 1,678,141 5,958,219 7,636,360 12,582 1,678,141 5,970,801 7,648,942 243,322 2015 1/24/2019 San Antonio II TX — 3,109,187 8,579,806 11,688,993 — — — — — 2004 1/24/2019 Stoney Creek I TOR 5,591,950 2,363,127 8,154,202 10,517,329 321,104 (3 ) 2,423,704 8,414,729 10,838,433 261,845 N/A 1/24/2019 Torbarrie TOR 5,936,996 2,714,051 — 2,714,051 — (3 ) 2,783,623 — 2,783,623 — 1980 1/24/2019 Baseline AZ 5,882,318 1,307,289 11,385,380 12,692,669 — 1,307,289 11,385,380 12,692,669 362,892 2016 1/24/2019 3173 Sweeten Creek Rd, Asheville NC 3,636,033 1,036,164 8,764,558 9,800,722 1,048,068 1,036,164 9,812,626 10,848,790 276,861 1982 1/24/2019 Elk Grove IL 3,670,067 2,384,166 6,000,071 8,384,237 26,971 2,384,166 6,027,042 8,411,208 189,136 2016 1/24/2019 Garden Grove CA 10,885,408 8,076,202 13,152,494 21,228,696 68,311 8,076,202 13,220,805 21,297,007 405,382 2017 1/24/2019 Deaverview Rd, Asheville NC 2,830,546 1,449,001 4,412,039 5,861,040 121,594 1,449,001 4,533,633 5,982,634 149,150 1992 1/24/2019 Highland Center Blvd, Asheville NC 3,267,324 1,763,875 4,823,116 6,586,991 16,000 1,763,875 4,839,116 6,602,991 156,742 1994 1/24/2019 Sarasota FL 3,687,085 1,084,165 7,359,913 8,444,078 4,123 1,084,165 7,364,036 8,448,201 214,523 2017 1/24/2019 Mount Pleasant SC 3,528,256 1,054,553 5,678,794 6,733,347 9,916 1,054,553 5,688,710 6,743,263 167,246 2016 1/24/2019 Nantucket MA 25,198,238 5,854,837 33,210,517 39,065,354 49,887 5,854,837 33,260,404 39,115,241 945,522 2002 1/24/2019 Pembroke Pines FL 8,559,709 3,146,970 14,296,167 17,443,137 6,192 3,146,970 14,302,359 17,449,329 431,009 2018 1/24/2019 Riverview FL 4,674,089 1,593,082 7,102,271 8,695,353 9,552 1,593,082 7,111,823 8,704,905 228,810 2018 1/24/2019 Eastlake CA 10,193,371 2,120,104 15,417,746 17,537,850 5,411 2,120,104 15,423,157 17,543,261 430,220 2018 1/24/2019 McKinney TX 5,990,094 2,177,186 9,320,876 11,498,062 4,202 2,177,186 9,325,078 11,502,264 274,864 2016 1/24/2019 Hualapai Way, Las Vegas NV 5,428,523 742,839 9,018,717 9,761,556 3,775 742,839 9,022,492 9,765,331 264,977 2018 1/24/2019 Gilbert AZ 5,672,438 1,379,687 9,021,255 10,400,942 138,470 1,037,750 9,501,662 10,539,412 145,982 2019 7/11/2019 Corporate Office CA 4,179,994 975,000 5,525,000 6,500,000 — 975,000 5,525,000 6,500,000 75,399 2018 1/24/2019 $719,769,888 $334,865,685 $823,989,800 $1,158,855,485 $26,589,304 $332,350,688 $841,474,680 $1,173,825,368 $83,692,491 (1) The aggregate cost of real estate for United States federal income tax purposes is approximately $1,220,069,468. (2) This property is located in Ontario, Canada. (3) The change in cost at these self storage facilities are the net of the impact of foreign exchange rate changes and any actual additions. Activity in real estate facilities during 2019 was as follows: 2019 Real estate facilities Balance at beginning of year $ 820,296,026 Facility acquisitions 351,070,238 Impact of foreign exchange rate changes 6,582,603 Improvements and additions 7,565,494 Asset disposals (11,688,993 ) Balance at end of year $ 1,173,825,368 Accumulated depreciation Balance at beginning of year $ (54,264,685 ) Asset disposals 202,416 Depreciation expense (29,188,668 ) Impact of foreign exchange rate changes (441,554 ) Balance at end of year $ (83,692,491 ) Construction in process Balance at beginning of year $ 130,383 Net additions and assets placed into service 12,107,339 Balance at end of year $ 12,237,722 Real estate facilities, net $ 1,102,370,599

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Equity Investments	Equity Investments Under the equity method, our investments will be stated at cost and adjusted for our share of net earnings or losses and reduced by distributions and impairments, as applicable. Equity in earnings will generally be recognized based on our ownership interest in the earnings of each of the unconsolidated investments.
Investments in and Advances to Managed REITs	Investments in and Advances to Managed REITs As of September 30, 2020, and December 31, 2019, we owned equity investments with a carrying value of approximately $7.9 million, and $5.8 million, respectively, in the Managed REITs; such amounts are included in Investments in and advances to Managed REITs within our Consolidated Balance Sheets. We account for these investments using the equity method of accounting as we have the ability to exercise significant influence, but not control, over the Managed REITs’ operating and financial policies through our advisory and property management agreements with the respective Managed REITs. The equity method of accounting requires the investment to be initially recorded at cost and subsequently adjusted for our share of equity in the respective Managed REIT’s earnings and reduced by distributions. Also included in Investments in and advances to Managed REITs as of September 30, 2020 are receivables from the Managed REITs of approximately $320,000. As of December 31, 2019, receivables from the Managed REITs approximated $275,000. For additional discussion, Note 11 – Related Party Transactions.
Basis of Presentation	Basis of Presentation The accompanying consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) as contained within the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) and the rules and regulations of the SEC.	Basis of Presentation The accompanying consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) as contained within the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) and the rules and regulations of the SEC.
Principles of Consolidation	Principles of Consolidation Our financial statements, and the financial statements of our Operating Partnership, including its wholly-owned subsidiaries, are consolidated in the accompanying consolidated financial statements. The portion of these entities not wholly-owned by us is presented as noncontrolling interests. All significant intercompany accounts and transactions have been eliminated in consolidation.	Principles of Consolidation Our financial statements, and the financial statements of our Operating Partnership, including its wholly-owned subsidiaries, are consolidated in the accompanying consolidated financial statements. The portion of these entities not wholly-owned by us is presented as noncontrolling interests. All significant intercompany accounts and transactions have been eliminated in consolidation.
Consolidation Considerations	Consolidation Considerations Current accounting guidance provides a framework for identifying a variable interest entity (“VIE”) and determining when a company should include the assets, liabilities, noncontrolling interests, and results of activities of a VIE in its consolidated financial statements. In general, a VIE is an entity or other legal structure used to conduct activities or hold assets that either (1) has an insufficient amount of equity to carry out its principal activities without additional subordinated financial support, (2) has a group of equity owners that are unable to make significant decisions about its activities, or (3) has a group of equity owners that do not have the obligation to absorb losses or the right to receive returns generated by its operations. Generally, a VIE should be consolidated if a party with an ownership, contractual, or other financial interest in the VIE (a variable interest holder) has the power to direct the VIE’s most significant activities and the obligation to absorb losses or right to receive benefits of the VIE that could be significant to the VIE. A variable interest holder that consolidates the VIE is called the primary beneficiary. Upon consolidation, the primary beneficiary generally must initially record all of the VIE’s assets, liabilities, and noncontrolling interest at fair value and subsequently account for the VIE as if it were consolidated based on majority voting interest. Our Operating Partnership is deemed to be a VIE and is consolidated by the Company as the primary beneficiary. As of September 30, 2020, and December 31, 2019, we were not a party to any other contracts/interests that would be deemed to be variable interest in VIEs other than our Tenant Programs joint ventures with SST IV and SSGT II which were acquired in the Self Administration Transaction, which are consolidated.	Consolidation Considerations Current accounting guidance provides a framework for identifying a variable interest entity (“VIE”) and determining when a company should include the assets, liabilities, noncontrolling interests, and results of activities of a VIE in its consolidated financial statements. In general, a VIE is an entity or other legal structure used to conduct activities or hold assets that either (1) has an insufficient amount of equity to carry out its principal activities without additional subordinated financial support, (2) has a group of equity owners that are unable to make significant decisions about its activities, or (3) has a group of equity owners that do not have the obligation to absorb losses or the right to receive returns generated by its operations. Generally, a VIE should be consolidated if a party with an ownership, contractual, or other financial interest in the VIE (a variable interest holder) has the power to direct the VIE’s most significant activities and the obligation to absorb losses or right to receive benefits of the VIE that could be significant to the VIE. A variable interest holder that consolidates the VIE is called the primary beneficiary. Upon consolidation, the primary beneficiary generally must initially record all of the VIE’s assets, liabilities, and noncontrolling interest at fair value and subsequently account for the VIE as if it were consolidated based on majority voting interest. Our Operating Partnership is deemed to be a VIE and is consolidated by the Company as the primary beneficiary. As of December 31, 2019, we were not a party to any other contracts/interests that would be deemed to be variable interest in VIEs other than our Tenant Programs joint ventures with SST IV and SSGT II which were acquired in the Self Administration Transaction, which are consolidated. As of December 31, 2018, we were not a party to any other contracts/interests that would be deemed to be variable interest in VIEs other than our Tenant Programs joint venture and a real estate joint venture, both of which were accounted for under the equity method of accounting. In January 2019, we sold our interest in the real estate joint venture to SST IV, a REIT previously sponsored by SAM and now sponsored by SRA. We acquired 50% of the Tenant Programs joint venture in the Self Administration Transaction such that we now own 100% of such joint venture. Please see Note 3 – Real Estate Facilities for further discussion regarding the real estate joint venture and Note 10 – Related Party Transactions for further discussions regarding our Tenant Programs joint venture. Other than these joint ventures, we did not have any variable interest relationships with unconsolidated entities or financial partnerships as of December 31, 2018. Under the equity method, our investments in real estate joint ventures will be stated at cost and adjusted for our share of net earnings or losses and reduced by distributions. Equity in earnings will generally be recognized based on our ownership interest in the earnings of each of the unconsolidated investment.
Noncontrolling Interest in Consolidated Entities	Noncontrolling Interests in Consolidated Entities We account for the noncontrolling interests in our Operating Partnership and the noncontrolling interests in our Tenant Programs joint ventures with SST IV and SSGT II in accordance with the related accounting guidance. Due to our control through our general partnership interest in our Operating Partnership and the limited rights of the limited partners, our Operating Partnership, including its wholly-owned subsidiaries, are consolidated with the Company and the limited partner interests are reflected as a noncontrolling interests in the accompanying consolidated balance sheets. We also consolidate our interests in the SST IV and SSGT II Tenant Programs and present the minority interests as noncontrolling interests in the accompanying consolidated balance sheets. The noncontrolling interests shall be attributed their share of income and losses, even if that attribution results in a deficit noncontrolling interests balance.	Noncontrolling Interest in Consolidated Entities We account for the noncontrolling interest in our Operating Partnership and the noncontrolling interests in our Tenant Programs joint ventures with SST IV and SSGT II in accordance with the related accounting guidance. Due to our control through our general partnership interest in our Operating Partnership and the limited rights of the limited partners, our Operating Partnership, including its wholly-owned subsidiaries, are consolidated with the Company and the limited partner interests are reflected as a noncontrolling interest in the accompanying consolidated balance sheets. We also consolidate our interests in the SST IV and SSGT II Tenant Programs and present them as noncontrolling interest in the accompanying consolidated balance sheets. The noncontrolling interests shall be attributed their share of income and losses, even if that attribution results in a deficit noncontrolling interest balance.
Use of Estimates	Use of Estimates The preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. The current economic environment has increased the degree of uncertainty inherent in these estimates and assumptions. Management will adjust such estimates when facts and circumstances dictate. Actual results could materially differ from those estimates. The most significant estimates made include the allocation of property purchase price to tangible and intangible assets acquired and liabilities assumed at relative fair value, the determination if certain entities should be consolidated, the evaluation of potential impairment of indefinite and long-lived assets and goodwill, and the estimated useful lives of real estate assets and intangibles.	Use of Estimates The preparation of the consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. The current economic environment has increased the degree of uncertainty inherent in these estimates and assumptions. Management will adjust such estimates when facts and circumstances dictate. Actual results could materially differ from those estimates. The most significant estimates made include the allocation of property purchase price to tangible and intangible assets acquired and liabilities assumed at relative fair value, the determination if certain entities should be consolidated, the evaluation of potential impairment of indefinite and long-lived assets, and the estimated useful lives of real estate assets and intangibles.
Cash and Cash Equivalents	Cash and Cash Equivalents We consider all short-term, highly liquid investments that are readily convertible to cash with a maturity of three months or less at the time of purchase to be cash equivalents. We may maintain cash and cash equivalents in financial institutions in excess of insured limits, but believe this risk will be mitigated by only investing in or through major financial institutions.	Cash and Cash Equivalents We consider all short-term, highly liquid investments that are readily convertible to cash with a maturity of three months or less at the time of purchase to be cash equivalents. We may maintain cash and cash equivalents in financial institutions in excess of insured limits, but believe this risk will be mitigated by only investing in or through major financial institutions.
Restricted Cash	Restricted Cash Restricted cash consists primarily of impound reserve accounts for property taxes, insurance and capital improvements in connection with the requirements of certain of our loan agreements.	Restricted Cash Restricted cash consists primarily of impound reserve accounts for property taxes, insurance and capital improvements in connection with the requirements of certain of our loan agreements.
Real Estate Purchase Price Allocation	Real Estate Purchase Price Allocation We account for acquisitions in accordance with GAAP which requires that we allocate the purchase price of a property to the tangible and intangible assets acquired and the liabilities assumed based on their relative fair values as of the date of acquisition. This guidance requires us to make significant estimates and assumptions, including fair value estimates, which requires the use of significant unobservable inputs as of the acquisition date. The value of the tangible assets, consisting of land and buildings, is determined as if vacant. Substantially all of the leases in place at acquired properties are at market rates, as the majority of the leases are month-to-month contracts. whether in-place, market in-place Allocation of purchase price to acquisitions of portfolios of facilities are allocated to the individual facilities based upon an income approach or a cash flow analysis using appropriate risk adjusted capitalization rates which take into account the relative size, age, and location of the individual facility along with current and projected occupancy and rental rate levels or appraised values, if available. Acquisitions that do not meet the definition of a business, as defined under current GAAP, are accounted for as asset acquisitions. During the nine months ended September 30, 2020 and 2019, our property acquisitions did not meet the definition of a business because substantially all of the fair value was concentrated in a single identifiable asset or group of similar identifiable assets (i.e. land, buildings, and related intangible assets) or because the acquisitions did not include a substantive process in the form of an acquired workforce or an acquired contract that cannot be replaced without significant cost, effort or delay. As a result, once an acquisition is deemed probable, transaction costs are capitalized rather than expensed. During the three months ended September 30, 2020 and 2019, we expensed approximately $470,000 and $26,000, respectively, of acquisition-related transaction costs that did not meet our capitalization policy during the respective periods. During the nine months ended September 30, 2020 and 2019, we expensed approximately $594,000 and $194,000, respectively, of acquisition-related transaction costs that did not meet our capitalization policy during the respective periods.	Real Estate Purchase Price Allocation We account for acquisitions in accordance with GAAP which requires that we allocate the purchase price of a property to the tangible and intangible assets acquired and the liabilities assumed based on their relative fair values. This guidance requires us to make significant estimates and assumptions, including fair value estimates, which requires the use of significant unobservable inputs as of the acquisition date. The value of the tangible assets, consisting of land and buildings is determined as if vacant. Substantially all of the leases in place at acquired properties are at market rates, as the majority of the leases are month-to-month contracts. whether in-place, market in-place Allocation of purchase price to acquisitions of portfolios of facilities are allocated to the individual facilities based upon an income approach or a cash flow analysis using appropriate risk adjusted capitalization rates which take into account the relative size, age, and location of the individual facility along with current and projected occupancy and rental rate levels or appraised values, if available. Acquisitions that do not meet the definition of a business, as defined under current GAAP, are accounted for as asset acquisitions. During the years ended December 31, 2019 and 2018, our property acquisitions have not met the definition of a business because substantially all of the fair value is concentrated in a single identifiable asset or group of similar identifiable assets (i.e. land, buildings, and related intangible assets) or because the acquisition does not include a substantive process in the form of an acquired workforce or an acquired contract that cannot be replaced without significant cost, effort or delay. As a result, once an acquisition is deemed probable, transaction costs are capitalized rather than expensed. For the year ended December 31, 2017, prior to our adoption of Accounting Standards Update 2017-01, 2017-01”), During the years ended December 31, 2019, 2018, and 2017 we expensed approximately $0.2 million, $1.1 million, and $0.5 million respectively, of acquisition-related transaction costs that did not meet our capitalization policy during the respective periods.
Purchase Price Allocation for the Acquisition of a Business	Purchase Price Allocation for the Acquisition of a Business Should the initial accounting for an acquisition that meets the definition of a business be incomplete by the end of a reporting period that falls within the measurement period, we report provisional amounts in our financial statements. During the measurement period, we may adjust the provisional amounts recognized at the acquisition date to reflect new information obtained about facts and circumstances that existed as of the acquisition date that, if known, would have affected the measurement of the amounts recognized as of that date and we record those adjustments to our financial statements. We apply any measurement period adjustments in the period in which the provisional amounts are finalized. As discussed in Note 4, the Self Administration Transaction was an acquisition of a business.	Purchase Price Allocation for the Acquisition of a Business Should the initial accounting for an acquisition that meets the definition of a business be incomplete by the end of a reporting period that falls within the measurement period, we report provisional amounts in our financial statements. During the measurement period, we adjust the provisional amounts recognized at the acquisition date to reflect new information obtained about facts and circumstances that existed as of the acquisition date that, if known, would have affected the measurement of the amounts recognized as of that date and we record those adjustments to our financial statements. We apply those measurement period adjustments in the period in which the provisional amounts are finalized. As discussed in Note 4, the Self Administration Transaction is an acquisition of a business.
Evaluation of Possible Impairment of Long-Lived Assets	Evaluation of Possible Impairment of Real Property Assets Management monitors events and changes in circumstances that could indicate that the carrying amounts of our real property assets may not be recoverable. When indicators of potential impairment are present that indicate that the carrying amounts of the assets may not be recoverable, we will assess the recoverability of the assets by determining whether the carrying value of the real property assets will be recovered through the undiscounted future operating cash flows expected from the use of the asset and its eventual disposition. In the event that such expected undiscounted future cash flows do not exceed the carrying value, we will adjust the value of the real property assets to the fair value and recognize an impairment loss. For the three and nine months ended September 30, 2020 and 2019, no impairment losses related to our real property assets were recognized.	Evaluation of Possible Impairment of Long-Lived Assets Management monitors events and changes in circumstances that could indicate that the carrying amounts of our long-lived assets may not be recoverable. When indicators of potential impairment are present that indicate that the carrying amounts of the assets may not be recoverable, we will assess the recoverability of the assets by determining whether the carrying value of the long-lived assets will be recovered through the undiscounted future operating cash flows expected from the use of the asset and its eventual disposition. In the event that such expected undiscounted future cash flows do not exceed the carrying value, we will adjust the value of the long-lived assets to the fair value and recognize an impairment loss. For the years ended December 31, 2019, 2018, and 2017, no impairment losses were recognized.
Goodwill Valuation	Goodwill Valuation We initially recorded goodwill of approximately $78.4 million as a result of the Self Administration Transaction. Goodwill is recorded as the difference, if any, between the aggregate consideration paid for an acquisition and the fair value of the net tangible assets and other intangible assets acquired. Goodwill is allocated to various reporting units, as applicable, and is not amortized. We perform an annual impairment test for goodwill, and between annual tests, we evaluate the recoverability of goodwill whenever events or changes in circumstances indicate that the carrying amount of goodwill may not be fully recoverable. In our impairment test of goodwill, we perform a quantitative analysis to compare the fair value of each reporting unit to its respective carrying amount. If the carrying amount of goodwill exceeds its fair value, an impairment charge will be recognized. See Note 5 - Self Administration Transaction - Intangibles, Goodwill, and Certain Other Assets and Liabilities for additional information.	Goodwill Valuation We have recorded goodwill of approximately $78.4 million as a result of the Self Administration Transaction. Goodwill is recorded as the difference, if any, between the aggregate consideration paid for an acquisition and the fair value of the net tangible assets and other intangible assets acquired. Goodwill is allocated to various reporting units, as applicable and is not amortized. We perform an annual impairment test for goodwill and between annual tests, we evaluate the recoverability of goodwill whenever events or changes in circumstances indicate that the carrying amount of goodwill may not be fully recoverable. In our impairment test of goodwill, we perform a quantitative analysis to compare the fair value of each reporting unit to its respective carrying amount. If the carrying amount of goodwill exceeds its fair value, an impairment charge will be recognized.
Trademarks	Trademarks In connection with the Self Administration Transaction, we initially recorded $19.8 million associated with the two primary trademarks acquired. Prior thereto we had no amounts recorded related to trademarks. Trademarks are based on the value of our brands. Trademarks are valued using the relief from royalty method, which presumes that without ownership of such trademarks, we would have to make a stream of payments to a brand or franchise owner in return for the right to use their name. By virtue of this asset, we avoid any such payments and record the related intangible fair value of our ownership of the brand name. We used the following significant projections and assumptions to determine fair value under the relief from royalty method: revenues; royalty rate; tax expense; terminal growth rate; and discount rate. For the SmartStop ® ® after-tax after-tax after-tax 15-year The total estimated future amortization expense of the “Strategic Storage ® We evaluate whether any triggering events or changes in circumstances have occurred subsequent to our annual impairment test that would indicate an impairment condition may exist. If any change in circumstance or triggering event occurs, and results in a significant impact to our revenue and profitability projections, or any significant assumption in our valuation methods is adversely impacted, the impact could result in a material impairment charge in the future. See Note 5 - Self Administration Transaction - Intangibles, Goodwill, and Certain Other Assets and Liabilities for additional information.	Trademarks Trademarks are based on the value of our brands. Trademarks are valued using the relief from royalty method, which presumes that without ownership of such trademarks, we would have to make a stream of payments to a brand or franchise owner in return for the right to use their name. By virtue of this asset, we avoid any such payments and record the related intangible fair value of our ownership of the brand name. We used the following significant projections and assumptions to determine fair value under the relief from royalty method: revenues; royalty rate; tax expense; terminal growth rate; and discount rate. For the SmartStop ® ® after-tax after-tax after-tax 15-year We will evaluate whether any triggering events or changes in circumstances have occurred subsequent to our annual impairment test that would indicate an impairment condition may exist. If any change in circumstance or triggering event occurs, and results in a significant impact to our revenue and profitability projections, or any significant assumption in our valuations methods is adversely impacted, the impact could result in a material impairment charge in the future. In connection with the Self Administration Transaction, we recorded $19.8 million associated with the two primary trademarks acquired. Prior thereto we had no amounts recorded related to trademarks. Approximately $18.7 million of the original $19.8 million of trademarks relates to the “SmartStop ® ® ® The total estimated future amortization expense of the “Strategic Storage ®
Revenue Recognition	Revenue Recognition Self Storage Operations Management believes that all of our leases are operating leases. Rental income is recognized in accordance with the terms of the leases, which generally are month-to-month. Managed REIT Platform We earn property management and asset management revenue, pursuant to the respective property management and advisory agreement contracts, in connection with providing services to the Managed REITs. We have determined under ASC 606 – Revenue from Contracts with Customers (“ASC 606”), that the performance obligation for the property management services and asset management services are satisfied as the services are rendered. While we are compensated for our services on a monthly basis, these services represent a series of distinct daily services in accordance with ASC 606. Such revenue is recorded in the Managed REIT Platform revenue line within our consolidated statements of operations. The Managed REITs’ advisory agreements also provide for reimbursement to us of our direct and indirect costs of providing administrative and management services to the Managed REITs. These reimbursements include costs incurred in relation to organization and offering services provided to the Managed REITs and the reimbursement of salaries, bonuses, and other expenses related to benefits paid to our employees while performing services for the Managed REITs. The Managed REITs’ property management agreements also provide reimbursement to us for the property manager’s costs of managing the properties. Reimbursable costs include wages and salaries and other expenses that arise in operating, managing and maintaining the Managed REITs’ properties. Under ASC 606, direct reimbursement of such costs does not represent a separate performance obligation from our obligation to perform property management and asset management services. The reimbursement income is considered variable consideration, and is recognized as the costs are incurred, subject to limitations on the Managed REIT Platform’s ability to incur offering costs or limitations imposed by the advisory agreements. We have elected to separately record such revenue in the Reimbursable costs from Managed REITs line within our consolidated statements of operations. Additionally, we earn revenue in connection with our Tenant Programs joint ventures with our Managed REITs. We also earn development and construction management revenue from services we provide in connection with the project design, coordination and oversite of development and certain capital improvement projects undertaken by the Managed REITs. We recognize such revenue in the Managed REIT Platform revenue line within our consolidated statements of operations. See Note 11 – Related Party Transactions, for additional information regarding revenue generated from our Managed REIT Platform.	Revenue Recognition Self Storage Operations Management believes that all of our leases are operating leases. Rental income is recognized in accordance with the terms of the leases, which generally are month-to-month. Managed REIT Platform We earn property management revenue and asset management revenue, pursuant to the respective property management and advisory agreement contracts, in connection with providing services to the Managed REITs. We have determined under ASC 606 – Revenue from Contracts with Customers (“ASC 606”), that the performance obligation for the property management services and asset management services are satisfied as the services are rendered. While we are compensated for our services on a monthly basis, these services represent a series of distinct daily services in accordance with ASC 606. Such revenue is recorded in the Managed REIT Platform revenue line within our consolidated statements of operations. The Managed REITs’ advisory agreements also provide for reimbursement to us of our direct and indirect costs of providing administrative and management services to the Managed REITs. These reimbursements include costs incurred in relation to organization and offering services provided to the Managed REITs and the reimbursement of salaries, bonuses, and other expenses related to benefits paid to our employees while performing services for the Managed REITs. The Managed REITs’ property management agreements also provide reimbursement to us for the property manager’s costs of managing the properties. Reimbursable costs include wages and salaries and other expenses that arise in operating, managing and maintaining the Managed REITs’ properties. Under ASC 606, direct reimbursement of such costs does not represent a separate performance obligation from our obligation to perform property management and asset management services. The reimbursement income is considered variable consideration, and is recognized as the costs are incurred, subject to limitations on the Managed REIT Platform’s ability to incur offering costs or limitations imposed by the advisory agreements. We have elected to separately record such revenue in the Reimbursable costs from Managed REITs line within our consolidated statements of operations. Additionally, we earn revenue in connection with our Tenant Programs joint ventures with our Managed REITs. We also earn development and construction management revenue from services we provide in connection with the project design, coordination and oversite of development and certain capital improvement projects undertaken by the Managed REITs. We recognize such revenue in the Managed REIT Platform revenue line within our consolidated statements of operations. See Note 10 – Related Party Transactions, for additional information regarding revenue generated from our Managed REIT Platform.
Allowance for Doubtful Accounts	Allowance for Doubtful Accounts Tenant accounts receivable is reported net of an allowance for doubtful accounts. Management records a general reserve estimate based upon a review of the current status of tenant accounts receivable. It is reasonably possible that management’s estimate of the allowance will change in the future.	Allowance for Doubtful Accounts Tenant accounts receivable is reported net of an allowance for doubtful accounts. Management records a general reserve estimate based upon a review of the current status of tenant accounts receivable. It is reasonably possible that management’s estimate of the allowance will change in the future.
Real Estate Facilities	Real Estate Facilities We capitalize costs incurred to develop, construct, renovate and improve properties, including interest and property taxes incurred during the construction period. The construction period begins when expenditures for the real estate assets have been made and activities that are necessary to prepare the asset for its intended use are in progress. The construction period ends when the asset is substantially complete and ready for its intended use.	Real Estate Facilities Real estate facilities are recorded based on the relative fair value as of the date of acquisition. We capitalize costs incurred to develop, construct, renovate and improve properties, including interest and property taxes incurred during the construction period. The construction period begins when expenditures for the real estate assets have been made and activities that are necessary to prepare the asset for its intended use are in progress. The construction period ends when the asset is substantially complete and ready for its intended use.
Depreciation of Real Property Assets	Depreciation of Real Property Assets Our management is required to make subjective assessments as to the useful lives of our depreciable assets. We consider the period of future benefit of the asset to determine the appropriate useful lives. Depreciation of our real property assets is charged to expense on a straight-line basis over the estimated useful lives as follows: Description Standard Depreciable Life Land Not Depreciated Buildings 30-40 Site Improvements 7-10	Depreciation of Real Property Assets Our management is required to make subjective assessments as to the useful lives of our depreciable assets. We consider the period of future benefit of the asset to determine the appropriate useful lives. Depreciation of our real property assets is charged to expense on a straight-line basis over the estimated useful lives as follows: Description Standard Depreciable Life Land Not Depreciated Buildings 30-40 Site Improvements 7-10
Depreciation of Personal Property Assets	Depreciation of Personal Property Assets Personal property assets consist primarily of furniture, fixtures and equipment and are depreciated on a straight-line basis over the estimated useful lives, generally ranging from 3 to 5 years, and are included in other assets on our consolidated balance sheets.	Depreciation of Personal Property Assets Personal property assets consist primarily of furniture, fixtures and equipment and are depreciated on a straight-line basis over the estimated useful lives generally ranging from 3 to 5 years, and are included in other assets on our consolidated balance sheets.
Intangible Assets	Intangible Assets We have allocated a portion of our real estate purchase price to in-place in-place in-place in-place in-place in-place The total estimated future amortization expense of intangible assets related to our self storage properties for the years ending December 31, 2020, 2021, 2022, 2023, 2024, and thereafter is approximately $25,000, $0.1 million, $0.1 million, $0.1 million, $0.1 million, and $1.0 million, respectively. In connection with the Self Administration Transaction, we allocated a portion of the consideration to the contracts that we acquired related to the Managed REITs and the customer relationships related to the Tenant Programs joint ventures. For these intangibles, we are amortizing such amounts on a straight-line basis over the estimated benefit period of the contracts and customer relationships. As of September 30, 2020, the gross amount of the intangible assets related to the Managed REITs contracts and the customer relationships related to the Tenant Programs joint ventures was approximately $18.1 million and accumulated amortization of those intangibles totaled approximately $6.3 million. As of December 31, 2019, the gross amount of the intangibles related to the Managed REITs contracts and the customer relationships related to the Tenant Programs joint ventures was approximately $26.5 million and accumulated amortization of those intangibles totaled approximately $2.9 million. The total estimated future amortization expense for such intangible assets for the years ending December 31, 2020, 2021, 2022, 2023, 2024 and thereafter is approximately $1.0 million, $2.9 million, $2.9 million, $2.9 million, $1.8 million, and $0.3 million, respectively. We evaluate whether any triggering events or changes in circumstances have occurred subsequent to our annual impairment test that would indicate an impairment condition may exist. If any change in circumstance or triggering event occurs, and results in a significant impact to our revenue and profitability projections, or any significant assumption in our valuations methods is adversely impacted, the impact could result in a material impairment charge in the future. See Note 5 - Self Administration Transaction - Intangibles, Goodwill, and Certain Other Assets and Liabilities for additional information.	Intangible Assets We have allocated a portion of our real estate purchase price to in-place in-place in-place in-place in-place in-place The total estimated future amortization expense of intangible assets related to our self storage properties for the years ending December 31, 2020, 2021, 2022, 2023, 2024, and thereafter is approximately $5.0 million, $0.1 million, $0.1 million, $0.1 million, $0.1 million, and $1.0 million respectively. In connection with the Self Administration Transaction, we allocated a portion of the consideration to the contracts that we acquired related to the Managed REITs and the customer relationships related to the Tenant Programs joint ventures. For these intangibles, we are amortizing such amounts on a straight-line basis over the estimated benefit period of the contracts and customer relationships. As of December 31, 2019, the gross amount allocated to the contracts and customer relationships was approximately $26.5 million and the accumulated amortization was approximately $2.9 million. The total estimated future amortization expense for such intangible assets for the years ending December 31, 2020, 2021, 2022, 2023, 2024 and thereafter is approximately $5.7 million, $4.6 million, $4.6 million, $4.6 million, and $4.1 million, respectively.
Debt Issuance Costs	Debt Issuance Costs The net carrying value of costs incurred in connection with obtaining non revolving debt are presented on the balance sheet as a deduction from debt (see Note 7). Debt issuance costs are amortized on a straight-line basis over the term of the related loan, which is not materially different than the effective interest method. As of September 30, 2020, the gross amount allocated to debt issuance costs related to non-revolving non-revolving non-revolving non-revolving	Debt Issuance Costs The net carrying value of costs incurred in connection with our former revolving credit facility was presented as debt issuance costs on our consolidated balance sheet as of December 31, 2018. As of December 31, 2019 and 2018, accumulated amortization of debt issuance costs related to our revolving credit facility totaled none and approximately $45,000, respectively. The net carrying value of costs incurred in connection with obtaining non revolving debt are presented on the balance sheet as a deduction from debt (see Note 6). Debt issuance costs are amortized on a straight-line basis non-revolving
Organizational and Offering Costs	Organizational and Offering Costs We pay our Former Dealer Manager an ongoing stockholder servicing fee that is payable monthly and accrues daily in an amount equal to 1/365th of 1% of the purchase price per share of the Class T Shares sold in the Primary Offering. We will cease paying the stockholder servicing fee with respect to the Class T Shares sold in the Primary Offering at the earlier of (i) the date we list our shares on a national securities exchange, merge or consolidate with or into another entity, or sell or dispose of all or substantially all of our assets; (ii) the date at which the aggregate underwriting compensation from all sources equals 10% of the gross proceeds from the sale of both Class A Shares and Class T Shares in our Primary Offering (i.e., excluding proceeds from sales pursuant to our distribution reinvestment plan), which calculation shall be made by us with the assistance of our Former Dealer Manager commencing after the termination of the Primary Offering; (iii) the fifth anniversary of the last day of the fiscal quarter in which our Primary Offering (i.e., excluding our distribution reinvestment plan offering) terminated; and (iv) the date that such Class T Share is redeemed or is no longer outstanding. Our Former Dealer Manager entered into participating dealer agreements with certain other broker-dealers which authorized them to sell our shares. Upon sale of our shares by such broker-dealers, our Former Dealer Manager re-allowed re-allow non-accountable	Organizational and Offering Costs We pay our Dealer Manager an ongoing stockholder servicing fee that is payable monthly and accrues daily in an amount equal to 1/365th of 1% of the purchase price per share of the Class T Shares sold in the Primary Offering. We will cease paying the stockholder servicing fee with respect to the Class T Shares sold in the Primary Offering at the earlier of (i) the date we list our shares on a national securities exchange, merge or consolidate with or into another entity, or sell or dispose of all or substantially all of our assets, (ii) the date at which the aggregate underwriting compensation from all sources equals 10% of the gross proceeds from the sale of both Class A Shares and Class T Shares in our Primary Offering (i.e., excluding proceeds from sales pursuant to our distribution reinvestment plan), which calculation shall be made by us with the assistance of our Dealer Manager commencing after the termination of the Primary Offering; (iii) the fifth anniversary of the last day of the fiscal quarter in which our Primary Offering (i.e., excluding our distribution reinvestment plan offering) terminated; and (iv) the date that such Class T Share is redeemed or is no longer outstanding. Our Dealer Manager entered into participating dealer agreements with certain other broker-dealers which authorized them to sell our shares. Upon sale of our shares by such broker-dealers, our Dealer Manager re-allowed re-allow non-accountable
Foreign Currency Translation	Foreign Currency Translation For non-U.S.	Foreign Currency Translation For non-U.S.
Redeemable Common Stock	Redeemable Common Stock We adopted a share redemption program (“SRP”) that enables stockholders to sell their shares to us in limited circumstances. We record amounts that are redeemable under the SRP as redeemable common stock in the accompanying consolidated balance sheets since the shares are redeemable at the option of the holder and therefore their redemption is outside our control. The maximum amount redeemable under our SRP is limited to the number of shares we can repurchase with the amount of the net proceeds from the sale of shares under the distribution reinvestment plan. However, accounting guidance states that determinable amounts that can become redeemable should be presented as redeemable when such amount is known. Therefore, the net proceeds from the distribution reinvestment plan are considered to be temporary equity and are presented as redeemable common stock in the accompanying consolidated balance sheets. In addition, current accounting guidance requires, among other things, that financial instruments that represent a mandatory obligation of us to repurchase shares be classified as liabilities and reported at settlement value. When we determine we have a mandatory obligation to repurchase shares under the SRP, we reclassify such obligations from temporary equity to a liability based upon their respective settlement values. On August 26, 2019, our board of directors approved a partial suspension of our SRP, effective as of September 27, 2019, so that common shares were redeemable at the option of the holder only in connection with (i) death or disability of a stockholder, (ii) confinement to a long-term care facility, or (iii) other exigent circumstances. In order to preserve cash in light of the uncertainty relating to COVID-19 On August 20, 2020, our board of directors determined that it would be in our best interests to partially reinstate the SRP, effective as of September 23, 2020, solely for redemptions sought in connection with a stockholder’s death, qualifying disability, or confinement to a long-term care facility. Our board of directors also authorized us to honor redemption requests made pursuant to exigent circumstances that were pending at the time of the complete suspension of our SRP and that had not been revoked. For the year ended December 31, 2019, we received redemption requests totaling approximately $4.9 million (approximately 0.5 million shares), approximately $4.5 million of which were fulfilled during the year ended December 31, 2019, with the remaining approximately $0.4 million included in accounts payable and accrued liabilities as of December 31, 2019, and fulfilled in January 2020. During the six months ended June 30, 2020, approximately 0.1 million shares, or $1.3 million, were requested to be redeemed; however, due to the suspension of our SRP, no such share redemption requests were fulfilled. During the three months ended September 30, 2020, approximately $0.7 million (approximately 0.1 million shares), were then requested to be redeemed. On October 30, 2020, requests that were previously requested during the six months ended June 30, 2020 and had not been rescinded, as well as the requests from the three months ended September 30, 2020, were redeemed, such redemptions totaled approximately 0.1 million shares, or $1.3 million, and were included in accounts payable and accrued liabilities as of September 30, 2020.	Redeemable Common Stock We adopted a share redemption program that enables stockholders to sell their shares to us in limited circumstances. We record amounts that are redeemable under the share redemption program as redeemable common stock in the accompanying consolidated balance sheets since the shares are redeemable at the option of the holder and therefore their redemption is outside our control. The maximum amount redeemable under our share redemption program is limited to the number of shares we can repurchase with the amount of the net proceeds from the sale of shares under the distribution reinvestment plan. However, accounting guidance states that determinable amounts that can become redeemable should be presented as redeemable when such amount is known. Therefore, the net proceeds from the distribution reinvestment plan are considered to be temporary equity and are presented as redeemable common stock in the accompanying consolidated balance sheets. In addition, current accounting guidance requires, among other things, that financial instruments that represent a mandatory obligation of us to repurchase shares be classified as liabilities and reported at settlement value. On August 26, 2019, our board of directors approved the suspension of our share redemption program, effective as of September 27, 2019, so that common shares are redeemable at the option of the holder only in connection with (i) death or disability of a stockholder, (ii) confinement to a long-term care facility, or (iii) other exigent circumstances. When we determine we have a mandatory obligation to repurchase shares under the share redemption program, we reclassify such obligations from temporary equity to a liability based upon their respective settlement values.
Accounting for Equity Awards	Accounting for Equity Awards We issue equity based awards in two forms: (1) restricted stock awards consisting of shares of our common stock and (2) long-term incentive plan units of our Operating Partnership (“LTIP Units”), both of which may be issued subject to either time based vesting criteria or performance based vesting criteria restrictions. For time based awards granted which contain a graded vesting schedule, compensation cost is recognized as an expense on a straight-line basis over the requisite service period as if the award was, in substance, a single award. For performance based awards, compensation cost is recognized over the requisite service period if and when we determine the performance condition is probable of being achieved. We record the cost of such equity based awards based on the grant date fair value, and have elected to record forfeitures as they occur.	Accounting for Equity Awards Through December 31, 2019, we have only issued service based awards. The cost of such restricted stock awards is required to be measured based on the grant date fair value and the cost recognized over the relevant service period. We have assumed no forfeitures in recognizing these costs; any such forfeitures will be recognized upon occurrence and will reduce the previously recognized expenses.
Fair Value Measurements	Fair Value Measurements Under GAAP, we are required to measure certain financial instruments at fair value on a recurring basis. In addition, we are required to measure other financial instruments and balances at fair value on a non-recurring • Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities that we have the ability to access; • Level 2 inputs may include quoted prices for similar assets and liabilities in active markets, as well as interest rates and yield curves that are observable at commonly quoted intervals; and • Level 3 inputs are unobservable inputs for the assets or liabilities that are typically based on an entity’s own assumptions as there is little, if any, related market activity. In instances where the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the fair value measurement will fall within the lowest level that is significant to the fair value measurement in its entirety. The accounting guidance for fair value measurements and disclosures provides a framework for measuring fair value and establishes a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. In determining fair value, we will utilize valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible as well as consider counterparty credit risk in our assessment of fair value. Considerable judgment will be necessary to interpret Level 2 and 3 inputs in determining fair value of our financial and non-financial Financial and non-financial non-recurring The carrying amounts of cash and cash equivalents, restricted cash, other assets, variable-rate debt, accounts payable and accrued liabilities, distributions payable and amounts due to affiliates approximate fair value. The table below summarizes our fixed rate notes payable at September 30, 2020, and December 31, 2019. The estimated fair value of financial instruments is subjective in nature and is dependent on a number of important assumptions, including discount rates and relevant comparable market information associated with each financial instrument. The fair value of the fixed rate notes payable was estimated by discounting the future cash flows using the current rates at which similar loans would be made to borrowers with similar credit ratings and for the same remaining maturities. The use of different market assumptions and estimation methodologies may have a material effect on the reported estimated fair value amounts. Accordingly, the estimates presented below are not necessarily indicative of the amounts we would realize in a current market exchange. September 30, 2020 December 31, 2019 Fair Value Carrying Value Fair Value Carrying Value Fixed Rate Secured Debt $ 320,200,000 $ 302,205,553 $ 311,700,000 $ 302,820,786 As of September 30, 2020, and December 31, 2019, we had interest rate swaps, interest rate caps, and a net investment hedge (See Notes 7 and 9). The valuations of these instruments were determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of the derivative. The analyses reflect the contractual terms of the derivatives, including the period to maturity, and used observable market-based inputs, including interest rate curves, foreign exchange rates, and implied volatilities. The fair value of the interest rate swaps were determined using the market standard methodology of netting the discounted future fixed cash payments and the discounted expected variable cash payments. Our fair values of our net investment hedges are based on the change in the spot rate at the end of the period as compared with the strike price at inception. To comply with GAAP, we incorporate credit valuation adjustments to appropriately reflect both our own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of derivative contracts for the effect of non-performance Although we had determined that the majority of the inputs used to value our derivatives were within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with our derivatives utilized Level 3 inputs, such as estimates of current credit spreads, to evaluate the likelihood of default by us and our counterparties. However, through September 30, 2020, we had assessed the significance of the impact of the credit valuation adjustments on the overall valuation of our derivative positions and determined that the credit valuation adjustments were not significant to the overall valuation of our derivatives. As a result, we determined that our derivative valuations in their entirety were classified in Level 2 of the fair value hierarchy.	Fair Value Measurements Under GAAP, we are required to measure certain financial instruments at fair value on a recurring basis. In addition, we are required to measure other financial instruments and balances at fair value on a non-recurring • Level 1 inputs utilize quoted prices (unadjusted) in active markets for identical assets or liabilities that we have the ability to access; • Level 2 inputs may include quoted prices for similar assets and liabilities in active markets, as well as interest rates and yield curves that are observable at commonly quoted intervals; and • Level 3 inputs are unobservable inputs for the assets or liabilities that are typically based on an entity’s own assumptions as there is little, if any, related market activity. In instances where the determination of the fair value measurement is based on inputs from different levels of the fair value hierarchy, the fair value measurement will fall within the lowest level that is significant to the fair value measurement in its entirety. The accounting guidance for fair value measurements and disclosures provides a framework for measuring fair value and establishes a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. In determining fair value, we will utilize valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible as well as consider counterparty credit risk in our assessment of fair value. Considerable judgment will be necessary to interpret Level 2 and 3 inputs in determining fair value of our financial and non-financial Financial and non-financial non-recurring Self Administration Transaction The carrying amounts of cash and cash equivalents, restricted cash, other assets, variable-rate debt, accounts payable and accrued liabilities, distributions payable and amounts due to affiliates approximate fair value. The table below summarizes our fixed rate notes payable at December 31, 2019 and 2018. The estimated fair value of financial instruments is subjective in nature and is dependent on a number of important assumptions, including discount rates and relevant comparable market information associated with each financial instrument. The fair value of the fixed rate notes payable was estimated by discounting the future cash flows using the current rates at which similar loans would be made to borrowers with similar credit ratings and for the same remaining maturities. The use of different market assumptions and estimation methodologies may have a material effect on the reported estimated fair value amounts. Accordingly, the estimates presented below are not necessarily indicative of the amounts we would realize in a current market exchange. December 31, 2019 December 31, 2018 Fair Value Carrying Value Fair Value Carrying Value Fixed Rate Secured Debt $ 311,700,000 $ 302,820,786 $ 200,600,000 $ 207,357,391 As of December 31, 2019, and 2018, we had interest rate swaps, interest rate caps, and a net investment hedge (See Notes 6 and 8). The valuations of these instruments were determined using widely accepted valuation techniques including discounted cash flow analysis on the expected cash flows of the derivative. The analysis reflected the contractual terms of the derivative, including the period to maturity, and used observable market-based inputs, including interest rate curves, foreign exchange rates, and implied volatilities. The fair value of the interest rate swaps were determined using the market standard methodology of netting the discounted future fixed cash payments and the discounted expected variable cash payments. Our fair values of our net investment hedges are based on the change in the spot rate at the end of the period as compared with the strike price at inception. To comply with GAAP, we incorporate credit valuation adjustments to appropriately reflect both our own nonperformance risk and the respective counterparty’s nonperformance risk in the fair value measurements. In adjusting the fair value of derivative contracts for the effect of non-performance Although we had determined that the majority of the inputs used to value our derivatives were within Level 2 of the fair value hierarchy, the credit valuation adjustments associated with our derivatives utilized Level 3 inputs, such as estimates of current credit spreads to evaluate the likelihood of default by us and our counterparties. However, through December 31, 2019, we had assessed the significance of the impact of the credit valuation adjustments on the overall valuation of our derivative positions and determined that the credit valuation adjustments were not significant to the overall valuation of our derivatives. As a result, we determined that our derivative valuations in their entirety were classified in Level 2 of the fair value hierarchy.
Derivative Instruments and Hedging Activities	Derivative Instruments and Hedging Activities We record all derivatives on our balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether we have elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. Derivatives designated and qualifying as a hedge of the exposure to changes in the fair value of an asset, liability, or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivatives designated and qualifying as a hedge of the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges. Derivatives may also be designated as hedges of the foreign currency exposure of a net investment in a foreign operation. We may enter into derivative contracts that are intended to economically hedge certain of our risks, even though hedge accounting does not apply or we elect not to apply hedge accounting. For derivatives designated as net investment hedges, the effective portion of changes in the fair value of the derivatives are reported in accumulated other comprehensive income (loss). The ineffective portion of the change in fair value of the derivatives is recognized directly in earnings. Amounts are reclassified out of other comprehensive (loss) income into earnings (loss) when the hedged net investment is either sold or substantially liquidated.	Derivative Instruments and Hedging Activities We record all derivatives on our balance sheet at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether we have elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. Derivatives designated and qualifying as a hedge of the exposure to changes in the fair value of an asset, liability, or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivatives designated and qualifying as a hedge of the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges. Derivatives may also be designated as hedges of the foreign currency exposure of a net investment in a foreign operation. We may enter into derivative contracts that are intended to economically hedge certain of our risks, even though hedge accounting does not apply or we elect not to apply hedge accounting. For derivatives designated as net investment hedges, the effective portion of changes in the fair value of the derivatives are reported in accumulated other comprehensive income. The ineffective portion of the change in fair value of the derivatives is recognized directly in earnings. Amounts are reclassified out of other comprehensive (loss) income into earnings (loss) when the hedged net investment is either sold or substantially liquidated.
Income Taxes	Income Taxes We made an election to be taxed as a Real Estate Investment Trust (“REIT”), under Sections 856 through 860 of the Internal Revenue Code of 1986, as amended (the “Code”), commencing with our taxable year ended December 31, 2014. To qualify as a REIT, we must continue to meet certain organizational and operational requirements, including a requirement to distribute at least 90% of the REIT’s ordinary taxable income to stockholders (which is computed without regard to the dividends paid deduction or net capital gains and which does not necessarily equal net income as calculated in accordance with GAAP). As a REIT, we generally will not be subject to federal income tax on taxable income that we distribute to our stockholders. If we fail to qualify as a REIT in any taxable year, we will then be subject to federal income taxes on our taxable income at regular corporate rates and will not be permitted to qualify for treatment as a REIT for federal income tax purposes for four years following the year during which qualification is lost unless the IRS grants us relief under certain statutory provisions. Such an event could materially adversely affect our net income and net cash available for distribution to stockholders. However, we believe that we are organized and operate in such a manner as to qualify for treatment as a REIT and intend to operate in the foreseeable future in such a manner that we will remain qualified as a REIT for federal income tax purposes. Even if we continue to qualify for taxation as a REIT, we may be subject to certain state and local taxes on our income and property, and federal income and excise taxes on our undistributed income. We filed an election to treat our TRS as a taxable REIT subsidiary effective January 1, 2014. In general, the TRS performs additional services for our customers and provides the advisory and property management services to the Managed REITs and otherwise generally engages in any real estate or non-real	Income Taxes We made an election to be taxed as a Real Estate Investment Trust (“REIT”), under Sections 856 through 860 of the Internal Revenue Code of 1986, as amended (the “Code”), commencing with our taxable year ended December 31, 2014. To qualify as a REIT, we must continue to meet certain organizational and operational requirements, including a requirement to distribute at least 90% of the REIT’s ordinary taxable income to stockholders (which is computed without regard to the dividends paid deduction or net capital gains and which does not necessarily equal net income as calculated in accordance with GAAP). As a REIT, we generally will not be subject to federal income tax on taxable income that we distribute to our stockholders. If we fail to qualify as a REIT in any taxable year, we will then be subject to federal income taxes on our taxable income at regular corporate rates and will not be permitted to qualify for treatment as a REIT for federal income tax purposes for four years following the year during which qualification is lost unless the IRS grants us relief under certain statutory provisions. Such an event could materially adversely affect our net income and net cash available for distribution to stockholders. However, we believe that we are organized and operate in such a manner as to qualify for treatment as a REIT and intend to operate in the foreseeable future in such a manner that we will remain qualified as a REIT for federal income tax purposes. Even if we continue to qualify for taxation as a REIT, we may be subject to certain state and local taxes on our income and property, and federal income and excise taxes on our undistributed income. We filed an election to treat our TRS as a taxable REIT subsidiary effective January 1, 2014. In general, the TRS performs additional services for our customers and provides the advisory and property management services to the Managed REITs and otherwise generally engages in any real estate or non-real
Segment Reporting	Segment Reporting Our business is comprised of two reportable segments: (i) self storage operations and (ii) the Managed REIT Platform business. Please see Note 10 – Segment Disclosures for additional detail.	Segment Reporting Our business is comprised of two reportable segments: (i) self storage operations and (ii) the Managed REIT Platform business. Please see Note 9 – Segment Disclosures for additional detail.
Convertible Preferred Stock	Convertible Preferred Stock We classify our Series A Convertible Preferred Stock on our consolidated balance sheets using the guidance in ASC 480-10-S99. We have analyzed whether the conversion features in our Series A Convertible Preferred Stock should be bifurcated under the guidance in ASC 815-10	Convertible Preferred Stock We classify our Series A Convertible Preferred Stock on our balance sheets using the guidance in ASC 480-10-S99. We have analyzed whether the conversion features in our Series A Convertible Preferred Stock should be bifurcated under the guidance in ASC 815-10
Per Share Data	Per Share Data Basic earnings per share attributable to our common stockholders for all periods presented are computed by dividing net income (loss) attributable to our common stockholders by the weighted average number of common shares outstanding during the period, excluding unvested restricted stock. Diluted earnings per share is computed by including the dilutive effect of the conversion of all potential common stock equivalents (which includes unvested restricted stock and convertible preferred stock) and the adding back of the Series A Convertible Preferred Stock dividends. For all periods presented, the dilutive effect of convertible preferred stock and unvested restricted stock was not included in the diluted weighted average shares as such impact was antidilutive.	Per Share Data Basic earnings per share attributable to our common stockholders for all periods presented are computed by dividing net income (loss) attributable to our common stockholders by the weighted average number of common shares outstanding during the period, excluding unvested restricted stock. Diluted earnings per share is computed by including the dilutive effect of the conversion of all potential common stock equivalents (which includes unvested restricted stock and convertible preferred stock) and the adding back of the Series A Convertible Preferred Stock dividends. For all periods presented, the dilutive effect of convertible preferred stock and unvested restricted stock was not included in the diluted weighted average shares as such impact was antidilutive.
Recently Issued Accounting Guidance		Recently Issued Accounting Guidance In February 2016, the FASB issued ASU 2016-02, 2016-02 ASU 2016-02, right-of-use ASU 2016-02, ASU 2016-02 month-to-month In August 2017, the FASB issued ASU 2017-12, 2017-12 2017-12 2017-12 2017-12 In January 2017, the FASB issued ASU 2017-04, “Intangibles—Goodwill . ASU 2017-04 effective

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Estimated Useful Lives used to Depreciate Real Property Assets	Depreciation of our real property assets is charged to expense on a straight-line basis over the estimated useful lives as follows: Description Standard Depreciable Life Land Not Depreciated Buildings 30-40 Site Improvements 7-10	Depreciation of our real property assets is charged to expense on a straight-line basis over the estimated useful lives as follows: Description Standard Depreciable Life Land Not Depreciated Buildings 30-40 Site Improvements 7-10
Summary of Fixed Rate Notes Payable	The table below summarizes our fixed rate notes payable at September 30, 2020, and December 31, 2019. The estimated fair value of financial instruments is subjective in nature and is dependent on a number of important assumptions, including discount rates and relevant comparable market information associated with each financial instrument. The fair value of the fixed rate notes payable was estimated by discounting the future cash flows using the current rates at which similar loans would be made to borrowers with similar credit ratings and for the same remaining maturities. The use of different market assumptions and estimation methodologies may have a material effect on the reported estimated fair value amounts. Accordingly, the estimates presented below are not necessarily indicative of the amounts we would realize in a current market exchange. September 30, 2020 December 31, 2019 Fair Value Carrying Value Fair Value Carrying Value Fixed Rate Secured Debt $ 320,200,000 $ 302,205,553 $ 311,700,000 $ 302,820,786	The table below summarizes our fixed rate notes payable at December 31, 2019 and 2018. The estimated fair value of financial instruments is subjective in nature and is dependent on a number of important assumptions, including discount rates and relevant comparable market information associated with each financial instrument. The fair value of the fixed rate notes payable was estimated by discounting the future cash flows using the current rates at which similar loans would be made to borrowers with similar credit ratings and for the same remaining maturities. The use of different market assumptions and estimation methodologies may have a material effect on the reported estimated fair value amounts. Accordingly, the estimates presented below are not necessarily indicative of the amounts we would realize in a current market exchange. December 31, 2019 December 31, 2018 Fair Value Carrying Value Fair Value Carrying Value Fixed Rate Secured Debt $ 311,700,000 $ 302,820,786 $ 200,600,000 $ 207,357,391

Real Estate Facilities (Tables)

Real Estate Facilities (Tables)	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Summary of Activity in Real Estate Facilities	The following summarizes the activity in real estate facilities during the nine months ended September 30, 2020: Real estate facilities Balance at December 31, 2019 $ 1,173,825,368 Real estate acquisitions 812,892 Construction in process placed in service 13,389,703 Impact of foreign exchange rate changes (4,145,778 ) Improvements and additions 7,155,135 Balance at September 30, 2020 $ 1,191,037,320 Accumulated depreciation Balance at December 31, 2019 $ (83,692,491 ) Depreciation expense (23,136,367 ) Impact of foreign exchange rate changes 272,635 Balance at September 30, 2020 $ (106,556,223 )	The following summarizes the activity in real estate facilities during the years ended December 31, 2019 and 2018: Real estate facilities Balance at December 31, 2017 $ 829,679,477 Impact of foreign exchange rate changes (11,915,703 ) Improvements and additions 2,532,252 Balance at December 31, 2018 820,296,026 Facilities acquired through merger with SSGT 334,139,296 Asset disposals (11,688,993 ) Corporate office acquired through Self Administration Transaction 6,500,000 Other facility acquisitions 10,430,942 Impact of foreign exchange rate changes 6,582,603 Improvements and additions 7,565,494 Balance at December 31, 2019 $ 1,173,825,368 Accumulated depreciation Balance at December 31, 2017 $ (34,686,973 ) Depreciation expense (20,134,068 ) Impact of foreign exchange rate changes 556,356 Balance at December 31, 2018 (54,264,685 ) Asset disposals 202,416 Depreciation expense (29,188,668 ) Impact of foreign exchange rate changes (441,554 ) Balance at December 31, 2019 $ (83,692,491 )
Summary of Reconciles Total Consideration Transferred	The estimated fair value of the consideration transferred totaled approximately $111.3 million and consisted of the following: Estimated Fair Value of Consideration Transferred Cash (1) $ 3,918,185 Class A-1 63,643,000 Class A-2 30,900,000 Total Consideration Transferred 98,461,185 Fair value of our preexisting 50% equity interests 12,800,000 Total $ 111,261,185 (1) We assumed a net asset of approximately $0.5 million, which per the Contribution Agreement we were required to pay to SAM the value thereof and such amount was included above as cash consideration.	The estimated fair value of the consideration transferred totaled approximately $111.3 million and consisted of the following: Estimated Fair Value of Consideration Transferred Cash (1) $ 3,918,185 Class A-1 63,643,000 Class A-2 30,900,000 Total Consideration Transferred 98,461,185 Fair value of our preexisting 50% equity interests 12,800,000 Total $ 111,261,185
Summary of Relative Fair Values of Assets Acquired and Liabilities Assumed	The following table summarizes the estimated fair values of the assets acquired and liabilities assumed: Identifiable Assets Acquired at Fair Value Cash and cash equivalents $ 36,443 Restricted cash 94,999 Land 975,000 Building 5,389,000 Site Improvements 136,000 Equipment, furniture and fixtures 651,000 Investments in Managed REITs 5,600,000 Other assets 1,084,629 Intangibles - customer relationships 1,600,000 Trademarks 19,800,000 Intangibles - management contracts 24,900,000 Total identifiable assets acquired $ 60,267,071 Identifiable Liabilities Assumed at Fair Value Debt $ 19,219,126 Accounts payable and accrued expenses 722,286 Deferred tax liabilities, net 7,415,654 Total liabilities assumed $ 27,357,066 Net identifiable assets acquired $ 32,910,005 Goodwill 78,372,980 Non-controlling Tenant Programs joint ventures (21,800 ) Net assets acquired $ 111,261,185	The following table summarizes the estimated fair values of the assets acquired and liabilities assumed: Identifiable Assets Acquired at Fair Value Cash and cash equivalents $ 36,443 Restricted cash 94,999 Land 975,000 Building 5,389,000 Site Improvements 136,000 Equipment, furniture and fixtures 651,000 Investments in Managed REITs 5,600,000 Other assets 1,084,629 Intangibles - customer relationships 1,600,000 Trademarks 19,800,000 Intangibles - management contracts 24,900,000 Total identifiable assets acquired $ 60,267,071 Identifiable Liabilities Assumed at Fair Value Debt $ 19,219,126 Accounts payable and accrued expenses 722,286 Deferred tax liabilities, net 7,415,654 Total liabilities assumed $ 27,357,066 Net identifiable assets acquired $ 32,910,005 Goodwill 78,372,980 Non-controlling Tenant Programs joint ventures (21,800 ) Net assets acquired $ 111,261,185
Summary of Purchase Price Allocation for Acquisitions		The following table summarizes our purchase price allocation for our acquisitions during the year ended December 31, 2019: Acquisition Acquisition Date Real Estate Assets Construction in (4) Intangibles Total (1) Debt Issued or Assumed 2019 Revenue (2) 2019 Property Operating Income (2)(3) SSGT Mergers (5) 1/24/2019 $ 334,139,296 $ 5,370,773 $ 13,571,765 $ 353,081,834 $ 193,376,846 $ 21,909,300 $ 12,032,555 Riggs Rd - (6) 7/11/2019 10,430,942 — — 10,430,942 5,702,000 62,085 (44,459 ) 2019 Total $ 344,570,238 $ 5,370,773 $ 13,571,765 $ 363,512,776 $ 199,078,846 $ 21,971,385 $ 11,988,096 (1) The allocations noted above are based on a determination of the relative fair value of the total consideration provided and represent the amount paid including capitalized acquisition costs. (2) The operating results of the self storage properties acquired during the year ended December 31, 2019 have been included in our consolidated statements of operations since their respective acquisition date. (3) Property operating income excludes corporate general and administrative expenses, asset management fees, interest expenses, depreciation, amortization and acquisition expenses. (4) Construction in process relates to the Torbarrie property in Toronto, Canada, which is a self storage property under construction. Such facility partially opened in March 2020. (5) SSGT had stated investment objectives to acquire opportunistic self storage properties, including development, and lease-up (6) The Gilbert Property was recently developed and acquired, with 0% occupancy as of its acquisition date.
Strategic Storage Growth Trust, Inc
Summary of Reconciles Total Consideration Transferred	The following table reconciles the total consideration transferred during the SSGT Mergers: Fair value of consideration transferred: Cash $ 346,231,561 (1) Issuance of limited partnership units in our Operating Partnership to SS Growth Advisor, LLC 4,217,399 Total consideration transferred $ 350,448,960 (1) The approximately $346 million cash consideration consisted of approximately $320 million paid to the SSGT stockholders, approximately $19 million of SSGT debt that was repaid at closing, approximately $5 million of other SSGT liabilities paid at closing, and approximately $1 million in transaction costs.	The following table reconciles the total consideration transferred during the SSGT Mergers: Fair value of consideration transferred: Cash $ 346,231,561 (1) Issuance of limited partnership units in our Operating Partnership to SS Growth Advisor, LLC 4,217,399 Total consideration transferred $ 350,448,960 (1) The approximately $346 million cash consideration consisted of approximately $320 million paid to the SSGT shareholders, approximately $19 million of SSGT debt that was repaid at closing, approximately $5 million of other SSGT liabilities paid at closing, and approximately $1 million in transaction costs.
Summary of Relative Fair Values of Assets Acquired and Liabilities Assumed		The following table summarizes the relative fair values of the assets acquired and liabilities assumed in the SSGT Mergers: Assets Acquired: Land $ 62,261,573 Buildings 255,743,767 Site improvements 16,133,956 Construction in process 5,370,773 Intangible assets 13,571,765 Cash and cash equivalents 692,965 Other assets 6,536,838 Total assets acquired $ 360,311,637 Liabilities assumed: Debt $ 5,038,435 Accounts payable and accrued liabilities 4,824,242 Total liabilities assumed $ 9,862,677 Total net assets acquired $ 350,448,960

Self Administration Transacti_3

Self Administration Transaction (Tables)	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Business Combinations [Abstract]
Summary of Reconciles Total Consideration Transferred	The estimated fair value of the consideration transferred totaled approximately $111.3 million and consisted of the following: Estimated Fair Value of Consideration Transferred Cash (1) $ 3,918,185 Class A-1 63,643,000 Class A-2 30,900,000 Total Consideration Transferred 98,461,185 Fair value of our preexisting 50% equity interests 12,800,000 Total $ 111,261,185 (1) We assumed a net asset of approximately $0.5 million, which per the Contribution Agreement we were required to pay to SAM the value thereof and such amount was included above as cash consideration.	The estimated fair value of the consideration transferred totaled approximately $111.3 million and consisted of the following: Estimated Fair Value of Consideration Transferred Cash (1) $ 3,918,185 Class A-1 63,643,000 Class A-2 30,900,000 Total Consideration Transferred 98,461,185 Fair value of our preexisting 50% equity interests 12,800,000 Total $ 111,261,185
Summary of Relative Fair Values of Assets Acquired and Liabilities Assumed	The following table summarizes the estimated fair values of the assets acquired and liabilities assumed: Identifiable Assets Acquired at Fair Value Cash and cash equivalents $ 36,443 Restricted cash 94,999 Land 975,000 Building 5,389,000 Site Improvements 136,000 Equipment, furniture and fixtures 651,000 Investments in Managed REITs 5,600,000 Other assets 1,084,629 Intangibles - customer relationships 1,600,000 Trademarks 19,800,000 Intangibles - management contracts 24,900,000 Total identifiable assets acquired $ 60,267,071 Identifiable Liabilities Assumed at Fair Value Debt $ 19,219,126 Accounts payable and accrued expenses 722,286 Deferred tax liabilities, net 7,415,654 Total liabilities assumed $ 27,357,066 Net identifiable assets acquired $ 32,910,005 Goodwill 78,372,980 Non-controlling Tenant Programs joint ventures (21,800 ) Net assets acquired $ 111,261,185	The following table summarizes the estimated fair values of the assets acquired and liabilities assumed: Identifiable Assets Acquired at Fair Value Cash and cash equivalents $ 36,443 Restricted cash 94,999 Land 975,000 Building 5,389,000 Site Improvements 136,000 Equipment, furniture and fixtures 651,000 Investments in Managed REITs 5,600,000 Other assets 1,084,629 Intangibles - customer relationships 1,600,000 Trademarks 19,800,000 Intangibles - management contracts 24,900,000 Total identifiable assets acquired $ 60,267,071 Identifiable Liabilities Assumed at Fair Value Debt $ 19,219,126 Accounts payable and accrued expenses 722,286 Deferred tax liabilities, net 7,415,654 Total liabilities assumed $ 27,357,066 Net identifiable assets acquired $ 32,910,005 Goodwill 78,372,980 Non-controlling Tenant Programs joint ventures (21,800 ) Net assets acquired $ 111,261,185

Pro Forma Financial Informati_2

Pro Forma Financial Information (Unaudited) (Tables)	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Business Acquisition, Pro Forma Information [Abstract]
Summary of Consolidated Results of Operations on Pro Forma Basis	For the Nine Months ended September 30, September 30, Pro forma revenue $ 83,770,481 $ 91,130,790 Pro forma operating expenses $ (76,609,917 ) $ (115,057,438 ) Pro forma net income (loss) attributable to common stockholders $ (22,486,573 ) $ (49,248,355 )	Year Ended December 31, 2019 Year Ended December 31, 2018 Pro forma revenue $ 113,886,094 $ 84,190,199 Pro forma operating expenses $ (103,374,709 ) $ (68,661,890 ) Pro forma net income (loss) attributable to common stockholders $ (27,684,937 ) $ (3,296,311 )

Debt (Tables)

Debt (Tables)	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Debt Disclosure [Abstract]
Schedule of Summarized Real Estate Secured Debt	The Company’s debt is summarized as follows: Encumbered Property September 30, 2020 December 31, 2019 Interest Rate Maturity Date KeyBank CMBS Loan (1) $ 95,000,000 $ 95,000,000 3.89 % 8/1/2026 KeyBank Florida CMBS Loan (2) 52,000,000 52,000,000 4.65 % 5/1/2027 Midland North Carolina CMBS Loan (3) 46,591,442 47,048,287 5.31 % 8/1/2024 Canadian CitiBank Loan (4) 83,274,660 85,500,660 2.73 % 10/9/2021 CMBS SASB Loan (5) 235,000,000 235,000,000 3.15 % (11) 2/9/2022 CMBS Loan (6) 104,000,000 104,000,000 5.00 % 2/1/2029 Secured Loan (7) (8) 85,512,000 85,512,000 3.00 % 1/24/2022 Stoney Creek Loan (9) 5,446,364 5,591,950 4.65 % 10/1/2021 Torbarrie Loan (10) 6,125,060 5,936,996 4.65 % 9/1/2021 Ladera Office Loan 4,119,943 4,179,994 4.29 % 11/1/2026 Premium on secured debt, net 494,168 592,505 Debt issuance costs, net (4,774,227 ) (7,629,390 ) Total debt $ 712,789,410 $ 712,733,002 (1) This fixed rate loan encumbers 29 properties (Whittier, La Verne, Santa Ana, Upland, La Habra, Monterey Park, Huntington Beach, Chico, Lancaster I, Riverside, Fairfield, Lompoc, Santa Rosa, Federal Heights, Aurora, Littleton, Bloomingdale, Crestwood, Forestville, Warren I, Sterling Heights, Troy, Warren II, Beverly, Everett, Foley, Tampa, Boynton Beach, and Lancaster II) with monthly interest only payments until September 2021, at which time both interest and principal payments will be due monthly. The separate assets of these encumbered properties are not available to pay our other debts. (2) This fixed rate loan encumbers five properties (Pompano Beach, Lake Worth, Jupiter, Royal Palm Beach, and Delray) with monthly interest only payments until June 2022, at which time both interest and principal payments will be due monthly. The separate assets of these encumbered properties are not available to pay our other debts. (3) This fixed rate loan encumbers 11 self storage properties (Asheville I, Arden, Asheville II, Hendersonville I, Asheville III, Asheville IV, Asheville V, Asheville VI, Asheville VII, Asheville VIII, and Hendersonville II) with monthly interest only payments until September 2019, at which time both interest and principal payments became due monthly. (4) This variable rate loan encumbers 10 of our Canadian properties and the amounts shown above are in USD based on the foreign exchange rate in effect of the dates presented. We purchased interest rate caps that cap CDOR at 3.0% until October 15, 2021. The separate assets of these encumbered properties are not available to pay our other debts. (5) This variable rate loan encumbers 29 properties (Morrisville, Cary, Raleigh, Vallejo, Xenia, Sidney, Troy, Greenville, Washington Court House, Richmond, Connersville, Port St Lucie, Sacramento, Concord, Oakland, Wellington, Doral, Naples, Baltimore, Aurora, Jones Blvd - Las Vegas, Russell Rd - Las Vegas, Riverside, Stockton, Azusa, Romeoville, Elgin, San Antonio, Kingwood). The separate assets of these encumbered properties are not available to pay our other debts. (6) This fixed rate loan encumbers 10 properties (Myrtle Beach I, Myrtle Beach II, Port St. Lucie, Plantation, Sonoma, Las Vegas I, Las Vegas II, Las Vegas III, Ft Pierce, Nantucket Island). The separate assets of these encumbered properties are not available to pay our other debts. (7) This variable rate loan encumbers 16 properties (Colorado Springs, Aurora, Phoenix, 3173 Sweeten Creek Rd—Asheville, Elk Grove, Garden Grove, Deaverview Rd - Asheville, Highland Center Blvd - Asheville, Sarasota, Mount Pleasant, Pembroke Pines, Riverview, Eastlake, McKinney, Hualapai Way - Las Vegas, Gilbert). The separate assets of these encumbered properties are not available to pay our other debts. (8) On January 29, 2019, we entered into a $161.2 million notional interest rate swap whereby LIBOR was fixed at approximately 2.6% until August 1, 2020. On October 29, 2019, in connection with the pay off of the Senior Term Loan, we terminated approximately $75.7 million of this interest rate swap which required a settlement payment of approximately $0.6 million. The remaining $85.5 million of the interest rate swap effectively fixed the interest rate on the Secured Loan at 5.1% until August 1, 2020. To continue hedging our interest rate risk related to this loan, we purchased an interest rate cap on August 3, 2020 with a notional amount of $80 million that effectively caps LIBOR at 0.5% through August 2, 2021. (9) This variable rate loan bears interest at a rate of 1.95% plus Royal Bank of Canada Prime Rate, which was approximately 2.45% as of September 30, 2020, and in no event shall the total interest rate fall below 4.65% per annum. The Stoney Creek loan was assumed in the SSGT Mergers and had a balance of approximately $5 million USD as of the SSGT Mergers date. The Stoney Creek loan is secured by a first lien deed of trust on the Stoney Creek property and all improvements thereto, is cross-collateralized with the Torbarrie property, and is guaranteed by the Company. The amounts shown above are in USD based on the foreign exchange rate in effect as of September 30, 2020. (10) This variable rate loan bears interest at a rate of 1.95% plus Royal Bank of Canada Prime Rate, which was approximately 2.45% as of September 30, 2020, and in no event shall the total interest rate fall below 4.65% per annum. The Torbarrie loan was assumed in the SSGT Mergers and had no outstanding balance as of the date of the SSGT Mergers. The Torbarrie loan is a construction loan and is secured by a first lien deed of trust on the Torbarrie property and all improvements thereto, is cross-collateralized with the Stoney Creek property, and is guaranteed by the Company. The amounts shown above are in USD based on the foreign exchange rate in effect as of September 30, 2020. (11) This loan incurs interest at LIBOR plus 3%, which resulted in an interest rate of 3.15% as of September 30, 2020. However, in June 2019, we purchased an interest rate swap whereby LIBOR is fixed at 1.79% though February 15, 2022, which results in an effective fixed interest rate of 4.79% on this loan.	The Company’s debt is summarized as follows: Encumbered Property December 31, 2019 December 31, 2018 Interest Rate Maturity Date KeyBank CMBS Loan (5) $ 95,000,000 $ 95,000,000 3.89 % 8/1/2026 KeyBank Florida CMBS Loan (6) 52,000,000 52,000,000 4.65 % 5/1/2027 Midland North Carolina CMBS Loan (7) 47,048,287 47,249,999 5.31 % 8/1/2024 Canadian CitiBank Loan (8) 85,500,660 72,846,480 4.24 % 10/9/2020 CMBS SASB Loan (9) 235,000,000 — 4.76 % 2/9/2022 CMBS Loan (10) 104,000,000 — 5.00 % 2/1/2029 Secured Loan (11) (12) 85,512,000 — 4.26 % 1/24/2022 Stoney Creek Loan (13) 5,591,950 — 5.90 % 10/1/2021 Torbarrie Loan (14) 5,936,996 — 5.90 % 9/1/2021 Ladera Office Loan 4,179,994 — 4.29 % 11/1/2026 Raleigh/Myrtle Beach promissory note (1) — 11,878,396 5.73 % N/A Amended KeyBank Credit Facility (2) — 98,782,500 5.00 % N/A Oakland and Concord Loan (3) — 19,483,127 3.95 % N/A $11M KeyBank Subordinate Loan (4) — 11,000,000 6.25 % N/A Premium on secured debt, net 592,505 1,228,996 Debt issuance costs, net (7,629,390 ) (3,385,395 ) Total debt $ 712,733,002 $ 406,084,103 (1) Fixed rate debt with principal and interest payments due monthly. This promissory note was encumbered by five properties, Morrisville, Cary, Raleigh, Myrtle Beach I, and Myrtle Beach II. This loan was repaid in conjunction with the SSGT Merger financing. (2) As of December 31, 2018, this facility encumbered 21 properties (Xenia, Sidney, Troy, Greenville, Washington Court House, Richmond, Connersville, Vallejo, Port St. Lucie I, Sacramento, Sonoma, Las Vegas I, Las Vegas II, Las Vegas III, Baltimore, Aurora II, Plantation, Wellington, Naples, Port St. Lucie II, and Doral). This loan was repaid in conjunction with the SSGT Merger financing. (3) This loan was assumed during the acquisition of the Oakland and Concord properties, along with an interest rate swap with USAmeriBank that fixed the interest rate at 3.95%. This loan was repaid in conjunction with the SSGT Merger financing. (4) This variable rate loan encumbered 49% of the equity interest in the entities that own the 34 properties (the 29 properties encumbered by the KeyBank CMBS Loan and the five properties encumbered by the KeyBank Florida CMBS Loan), and was subordinate to the existing KeyBank CMBS Loan and KeyBank Florida CMBS Loan. This loan was repaid in conjunction with the SSGT Merger financing. (5) This fixed rate loan encumbers 29 properties (Whittier, La Verne, Santa Ana, Upland, La Habra, Monterey Park, Huntington Beach, Chico, Lancaster I, Riverside, Fairfield, Lompoc, Santa Rosa, Federal Heights, Aurora, Littleton, Bloomingdale, Crestwood, Forestville, Warren I, Sterling Heights, Troy, Warren II, Beverly, Everett, Foley, Tampa, Boynton Beach, and Lancaster II) with monthly interest only payments until September 2021, at which time both interest and principal payments will be due monthly. The separate assets of these encumbered properties are not available to pay our other debts. (6) This fixed rate loan encumbers five (7) This fixed rate loan encumbers 11 self storage properties (Asheville I, Arden, Asheville II, Hendersonville I, Asheville III, Asheville IV, Asheville V, Asheville VI, Asheville VII, Asheville VIII, and Hendersonville II) with monthly interest only payments until September 2019, at which time both interest and principal payments became due monthly. (8) This variable rate loan encumbers 10 of our Canadian properties and the amount shown above is in USD based on the foreign exchange rates in effect as of the dates presented. We have purchased interest rate caps that cap CDOR at 3.0% until October 15, 2021. The separate assets of these encumbered properties are not available to pay our other debts. (9) This variable rate loan encumbers our 29 properties (Morrisville, Cary, Raleigh, Vallejo, Xenia, Sidney, Troy, Greenville, Washington Court House, Richmond, Connersville, Port St Lucie, Sacramento, Concord, Oakland, Wellington, Doral, Naples, Baltimore, Aurora, Jones Blvd - Las Vegas, Russell Rd - Las Vegas, Riverside, Stockton, Azusa, Romeoville, Elgin, San Antonio, Kingwood). In June 2019, we purchased an interest rate swap whereby LIBOR is fixed at 1.79% though February 15, 2022. The separate assets of these encumbered properties are not available to pay our other debts. (10) This fixed rate loan encumbers 10 properties (Myrtle Beach I, Myrtle Beach II, Port St. Lucie, Plantation, Sonoma, Las Vegas I, Las Vegas II, Las Vegas III, Ft Pierce, Nantucket Island). (11) This variable rate loan encumbers 16 properties (Colorado Springs, Aurora, Phoenix, 3173 Sweeten Creek Rd - Asheville, Elk Grove, Garden Grove, Deaverview Rd - Asheville, Highland Center Blvd - Asheville, Sarasota, Mount Pleasant, Pembroke Pines, Riverview, Eastlake, McKinney, Hualapai Way - Las Vegas, Gilbert). The separate assets of these encumbered properties are not available to pay our other debts. (12) On January 29, 2019, we entered into a $161.2 million notional interest rate swap whereby LIBOR was fixed at approximately 2.6% until August 1, 2020. On October 29, 2019, in connection with the pay off of the Senior Term Loan, we terminated approximately $75.7 million of this interest rate swap which required a settlement payment of approximately $0.6 million. (13) This variable rate loan bears interest at a rate of 1.95% plus Royal Bank of Canada Prime Rate, which was approximately 3.95% as of December 31, 2019, and in no event shall the total interest rate fall below 4.65% per annum. The Stoney Creek loan was assumed in the SSGT Mergers and had a balance of approximately $5 million USD as of the SSGT Mergers date. The Stoney Creek loan is secured by a first lien deed of trust on the Stoney Creek property and all improvements thereto, is cross-collateralized with the Torbarrie property, and is guaranteed by the Company. The amount shown above is in USD based on the foreign exchange rate in effect as of December 31, 2019. (14) This variable rate loan bears interest at a rate of 1.95% plus Royal Bank of Canada Prime Rate, which was approximately 3.95% as of December 31, 2019, and in no event shall the total interest rate fall below 4.65% per annum. The Torbarrie loan was assumed in the SSGT Mergers and had no outstanding balance as of the date of the SSGT Mergers. The Torbarrie loan is a construction loan, which allows for borrowings up to approximately $10.3 million CAD and is secured by a first lien deed of trust on the Torbarrie property and all improvements thereto, is cross-collateralized with the Stoney Creek property, and is guaranteed by the Company. The amount shown above is in USD based on the foreign exchange rate in effect as of December 31, 2019.
Summary of Merger Financings	On January 24, 2019, in conjunction with the SSGT Mergers, we, through certain wholly-owned special purpose entities, entered into various financings (“SSGT Merger Financings”), as follows: Merger Financings Principal Borrowing as of Merger Date CMBS SASB Loan $ 235,000,000 CMBS Loan 104,000,000 Secured Loan 89,178,000 Senior Term Loan 72,000,000 Total $ 500,178,000	On January 24, 2019, in conjunction with the SSGT Mergers, we, through certain wholly-owned special purpose entities, entered into various financings (“SSGT Merger Financings”), as follows: Merger Financings Principal Borrowing as of Merger Date CMBS SASB Loan $ 235,000,000 CMBS Loan 104,000,000 Secured Loan 89,178,000 Senior Term Loan 72,000,000 Total $ 500,178,000
Schedule of Payment Related to Merger Consideration and Repayment of Debt	The proceeds from the SSGT Merger Financings were primarily used to facilitate the SSGT Mergers as previously described, including the payment of the SSGT merger consideration and the repayment, in full, of certain of our debt, as follows: Merger Financings Principal Repaid Raleigh/Myrtle Beach promissory note $ 11,862,471 Amended KeyBank Credit Facility 98,782,500 Oakland and Concord loan 19,443,753 $11M KeyBank Subordinate Loan 11,000,000 Total $ 141,088,724	The proceeds from the SSGT Merger Financings were primarily used to facilitate the SSGT Mergers as previously described, including the payment of the SSGT merger consideration and the repayment, in full, of certain of our debt, as follows: Merger Financings Principal Repaid Raleigh/Myrtle Beach promissory note $ 11,862,471 Amended KeyBank Credit Facility 98,782,500 Oakland and Concord loan 19,443,753 $11M KeyBank Subordinate Loan 11,000,000 Total $ 141,088,724
Future Principal Payment Requirements on Outstanding Debt	The following table presents the future principal payment requirements on outstanding debt as of September 30, 2020: 2020 $ 184,142 2021 96,140,324 2022 323,426,408 2023 3,384,134 2024 47,043,621 2025 and thereafter 246,890,840 Total payments 717,069,469 Premium on secured debt, net 494,168 Debt issuance costs, net (4,774,227 ) Total $ 712,789,410	The following table presents the future principal payment requirements on outstanding debt as of December 31, 2019: 2020 $ 86,208,937 2021 12,823,585 2022 323,426,829 2023 3,384,578 2024 47,035,146 2025 and thereafter 246,890,812 Total payments 719,769,887 Premium on secured debt, net 592,505 Debt issuance costs, net (7,629,390 ) Total $ 712,733,002

Derivative Instruments (Tables)

Derivative Instruments (Tables)	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Summary of Derivative Financial Instruments	The following table summarizes the terms of our derivative financial instruments as of September 30, 2020: Notional Amount Strike Effective Date Maturity Date Interest Rate Swaps: LIBOR Swap $ 235,000,000 1.79 % June 15, 2019 February 15, 2022 Interest Rate Cap: LIBOR Cap $ 80,000,000 0.50 % August 3, 2020 August 2, 2021 CDOR Cap 99,300,000 (1) 3.00 % October 11, 2018 October 15, 2021 CDOR Cap 1,000,000 (1) 3.00 % March 28, 2019 October 15, 2021 CDOR Cap 11,700,000 (1) 3.00 % May 28, 2019 October 15, 2021 Foreign Currency Forward: Denominated in CAD $ 95,000,000 (1) 1.334 February 10, 2020 February 10, 2021 (1) Notional amounts shown are denominated in CAD. The following table summarizes the terms of our derivative financial instruments as of December 31, 2019: Notional Amount Strike Effective Date Maturity Date Interest Rate Swaps: LIBOR Swap $ 85,512,000 2.61 % January 24, 2019 August 1, 2020 (3) LIBOR Swap 235,000,000 1.79 % June 15, 2019 February 15, 2022 Interest Rate Cap: CDOR Cap $ 99,300,000 (1) 3.00 % October 11, 2018 October 15, 2021 CDOR Cap 1,000,000 (1) 3.00 % March 28, 2019 October 15, 2021 CDOR Cap 11,700,000 (1) 3.00 % May 28, 2019 October 15, 2021 Foreign Currency Option: Denominated in CAD $ 95,000,000 (1) 1.323 December 9, 2019 February 10, 2020 (2) (1) Notional amount shown is denominated in CAD. (2) We settled this forward on February 10, 2020, receiving a net settlement of approximately $0.5 million and simultaneously entered into another $95 million CAD foreign currency forward with a maturity date of February 10, 2021. (3) On August 3, 2020, we entered into a LIBOR interest rate cap for a notional amount of $80 million which caps LIBOR at 0.5% through August 2, 2021.	The following table summarizes the terms of our derivative financial instruments as of December 31, 2019: Notional Amount Strike Effective Date or Date Assumed Maturity Date Interest Rate Swaps: LIBOR Swap $ 85,512,000 (3) 2.61 % January 24, 2019 August 1, 2020 LIBOR Swap 235,000,000 1.79 % June 15, 2019 February 15, 2022 Interest Rate Caps: CDOR Cap $ 99,300,000 (1) 3.00 % October 11, 2018 October 15, 2021 CDOR Cap 1,000,000 (1) 3.00 % March 28, 2019 October 15, 2021 CDOR Cap 11,700,000 (1) 3.00 % May 28, 2019 October 15, 2021 Foreign Currency Forward: Denominated in CAD $ 95,000,000 (1) 1.323 December 9, 2020 February 10, 2020 (2) (1) Notional amounts shown are denominated in CAD. (2) We settled this forward on February 10, 2020, receiving a net settlement of approximately $0.5 million and simultaneously entered into another $95 million CAD foreign currency forward with a maturity date of February 10, 2021. (3) We entered into this Swap on January 24, 2019 for an initial notional amount of approximately $161 million, however, on October 29, 2019, in connection with the settlement of the Senior Term Loan, we terminated approximately $75.7 million of this interest rate swap which required a settlement payment of approximately $0.6 million. The following table summarizes the terms of our derivative financial instruments as of December 31, 2018: Notional Amount Strike Effective Date or Date Assumed Maturity Date Interest Rate Swaps: Oakland and Concord loan $ 19,483,127 (2) 3.95 % May 18, 2016 April 10, 2023 Interest Rate Cap: CDOR Cap $ 99,300,000 (1) 3.00 % October 11, 2018 October 15, 2021 Foreign Currency Forward: Denominated in CAD $ 90,000,000 (1) 1.2846 March 28, 2018 January 28, 2019 (3) (1) Notional amount shown is denominated in CAD. (2) The Oakland and Concord loan interest rate swap was settled on January 24, 2019 in conjunction with the SSGT Mergers. (3) We settled this foreign currency forward on January 25, 2019 and received a settlement of approximately $2.1 million
Schedule of Fair Value of Derivative Financial Instruments and Classification In Consolidated Balance Sheets	The following table presents a gross presentation of the fair value of our derivative financial instruments as well as their classification on our consolidated balance sheets as of September 30, 2020 and December 31, 2019: Asset/Liability Derivatives Fair Value Balance Sheet Location September 30, 2020 December 31, 2019 Interest Rate Swaps Accounts payable and accrued liabilities $ 5,286,666 $ 1,695,140 Interest Rate Caps Other assets $ — $ 28,847 Foreign Currency Hedges Other assets $ — $ — Accounts payable and accrued liabilities 149,200 1,425,632	The following table presents a gross presentation of the fair value of our derivative financial instruments as well as their classification on our consolidated balance sheets as of December 31, 2019 and 2018: Asset/Liability Derivatives Fair Value Balance Sheet Location December 31, 2019 December 31, 2018 Interest Rate Swaps Other assets $ — $ 361,802 Accounts payable and accrued liabilities 1,695,140 — Interest Rate Caps Other assets $ 28,847 $ 87,808 Foreign Currency Hedges Other assets $ 4,016,806 Accounts payable and accrued liabilities $ 1,425,632 —

Segment Disclosures (Tables)

Segment Disclosures (Tables)	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Segment Reporting [Abstract]
Summary of Reportable Segments		The following table summarizes information for the reportable segments for the year ended December 31, 2019 below: Year Ended December 31, 2019 Self Storage Managed REIT Corporate and Other Total Revenues: Self storage rental revenue $ 99,494,560 $ — $ — $ 99,494,560 Ancillary operating revenue 3,706,700 — — 3,706,700 Managed REIT Platform revenue — 3,068,306 — 3,068,306 Reimbursable costs from Managed REITs — 3,258,983 — 3,258,983 Total revenues 103,201,260 6,327,289 — 109,528,549 Operating expenses: Property operating expenses 35,723,111 — — 35,723,111 Property operating expenses – affiliates 6,605,670 — — 6,605,670 Managed REIT Platform expense — 2,739,556 — 2,739,556 Reimbursable costs from Managed REITs — 3,258,983 — 3,258,983 General and administrative — — 10,461,453 10,461,453 Depreciation 29,305,979 — 299,299 29,605,278 Intangible amortization expense 9,051,083 2,442,311 — 11,493,394 Contingent earnout expense — — 200,000 200,000 Self administration transaction expenses — — 1,572,238 1,572,238 Acquisition expenses – affiliates 84,061 — — 84,061 Other property acquisition expenses 141,489 — — 141,489 Total operating expenses 80,911,393 8,440,850 12,532,990 101,885,233 Gain on sale of real estate 3,944,696 — — 3,944,696 Operating income (loss) 26,234,563 (2,113,561 ) (12,532,990 ) 11,588,012 Other income (expense): Interest expense (37,469,725 ) — (93,522 ) (37,563,247 ) Interest expense – accretion of fair market value of secured debt 131,611 — — 131,611 Interest expense – debt issuance costs (3,990,421 ) — (6,255 ) (3,996,676 ) Net loss on extinguishment of debt (2,635,278 ) — (12,355 ) (2,647,633 ) Gain resulting from acquisition of unconsolidated affiliates 8,017,353 — — 8,017,353 Other (1,159,570 ) 534,612 — (624,958 ) Net loss $ (10,871,467 ) $ (1,578,949 ) $ (12,645,122 ) $ (25,095,538 )
Summary of Total Assets by Segment	The following table summarizes our total assets by segment as of September 30, 2020: Segments September 30, 2020 Self Storage $ 1,158,358,937 (1) Managed REIT Platform 37,895,289 (1) Corporate and Other 33,512,424 Total assets $ 1,229,766,650 (1) Included in the assets of the Self Storage and the Managed REIT Platform segments as of September 30, 2020, are approximately $45.3 million and $8.4 million of goodwill, respectively.	The following table summarizes our total assets by segment: Segments December 31, 2019 Self Storage $ 1,175,887,634 (1) Managed REIT Platform 73,939,002 (1) Corporate and Other 61,607,095 Total assets $ 1,311,433,731 (1) Included in the assets of the Self Storage and the Managed REIT Platform segments are approximately $45.3 million, and $33.1 million of goodwill, respectively.

Related Party Transactions (Tab

Related Party Transactions (Tables)	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Related Party Transactions [Abstract]
Summary of Related Party Costs	Pursuant to the terms of the agreements described above, the following table summarizes related party costs incurred and paid by us for the year ended December 31, 2019, and the nine months ended September 30, 2020, as well as any related amounts payable as of December 31, 2019 and September 30, 2020: Year Ended December 31, 2019 Nine Months Ended September 30, 2020 Incurred Paid Payable Incurred Paid Payable Expensed Operating expenses $ 975,985 $ 1,185,370 $ — $ — $ — $ — Transfer Agent fees 324,943 374,404 — 465,520 438,520 27,000 Asset management fees 3,622,559 3,622,559 — — — — Property management fees 2,983,110 2,983,110 — — — — Acquisition expenses 84,061 84,061 — — — — Capitalized Acquisition costs 235,932 235,932 — — — — Self Administration Transaction working capital true-up 493,785 493,785 — — — — Additional paid-in Stockholder servicing fee (1) — 667,651 1,277,340 — 485,675 791,665 Total $ 8,720,375 $ 9,646,872 $ 1,277,340 $ 465,520 $ 924,195 $ 818,665 (1) We pay our Former Dealer Manager an ongoing stockholder servicing fee that is payable monthly and accrues daily in an amount equal to 1/365 th	Pursuant to the terms of the agreements described above, the following table summarizes related party costs incurred and paid by us for the years ended December 31, 2018 and 2019, as well as any related amounts payable as of December 31, 2018 and 2019: Year Ended December 31, 2018 Year Ended December 31, 2019 Incurred Paid Payable Incurred Paid Payable Expensed Operating expenses $ 2,199,596 $ 2,336,075 $ 209,385 $ 975,985 $ 1,185,370 $ — Transfer Agent fees 352,300 302,839 49,461 324,943 374,404 — Asset management fees 5,445,528 5,445,528 — 3,622,558 3,622,558 — Property management fees 4,809,106 4,809,106 — 2,983,111 2,983,111 — Acquisition expenses 72,179 72,179 — 84,061 84,061 — Capitalized Acquisition costs 48,664 48,664 — 235,932 235,932 — Self Administration Transaction working capital true-up — — — 493,785 493,785 — Additional paid-in Stockholder servicing fee (1) — 675,049 1,944,991 — 667,651 1,277,340 Total $ 12,927,373 $ 13,689,440 $ 2,203,837 $ 8,720,375 $ 9,646,872 $ 1,277,340 (1) We pay our Dealer Manager an ongoing stockholder servicing fee that is payable monthly and accrues daily in an amount equal to 1/365 th
Summary of Related Party Fees and Reimbursable Costs	Pursuant to the terms of the various agreements described above for the Managed REITs, the following summarizes the related party fees for the three and nine months ended September 30, 2020 and 2019: Managed REIT Platform Revenues Three Months Ended September 30, Three Months Ended September 30, Nine Months Ended September 30, Nine Months Ended September 30, Property management agreement – SST IV $ 367,256 $ 288,026 $ 1,039,753 $ 296,300 Property management agreement – SSGT II 90,069 40,222 241,624 40,822 Advisory agreement – SST IV 813,052 490,844 2,358,906 506,470 Advisory agreement – SSGT II 281,839 117,380 788,932 121,942 Tenant Program revenue – SST IV 252,885 120,498 610,635 120,498 Tenant Program revenue – SSGT II 73,011 15,895 152,624 15,895 Other Managed REIT revenue (1) 172,909 119,800 495,227 119,800 Total $ 2,051,021 $ 1,192,665 $ 5,687,701 $ 1,221,727 (1) Such revenues primarily includes construction management and development fees.	Pursuant to the terms of the various agreements described above for the Managed REITs, the following summarizes the related party fees for year ended December 31, 2019: Managed REIT Platform Revenues Year Ended December 31, 2019 Advisory agreement – SST IV $ 1,153,137 Property management agreement – SST IV 602,162 Tenant Program revenue – SST IV 254,148 Advisory agreement – SSGT II 310,786 Property management agreement – SSGT II 91,594 Tenant Program revenue – SSGT II 37,269 Other Managed REIT revenue (1) 619,210 Total $ 3,068,306 (1) Such revenues primarily includes construction management, development, and acquisitions related fees.

Equity Based Compensation (Tabl

Equity Based Compensation (Tables)	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Schedule of Non-vested Restricted Stock Grants		Restricted Stock Grants Shares Weighted-Average Grant-Date Fair Value Non-Vested 21,438 $ 10.38 Granted 251,993 9.48 Vested (7,625 ) 10.29 Non-Vested 265,806 $ 9.53
Time Based Awards
Schedule of Un-Vested Share Activity	The following table summarizes the activity related to our time based awards: Restricted Stock LTIPs Time Based Award Grants Shares Weighted-Average Grant-Date Fair Value Units Weighted-Average Grant-Date Fair Value Unvested at December 31, 2018 21,438 $ 10.38 $ — $ — Granted 251,993 9.48 — — Vested (7,625 ) 10.29 — — Forfeited — — — — Unvested at December 31, 2019 265,806 9.53 — — Granted 72,383 9.78 214,521 9.09 Vested (81,618 ) 9.57 — — Forfeited (6,567 ) 9.78 — — Unvested at September 30, 2020 250,004 $ 9.58 214,521 $ 9.09
Performance Based Awards
Schedule of Un-Vested Share Activity	The following table summarizes our activity related to our performance based awards: Restricted Stock LTIPs Performance Based Award Grants Shares Weighted-Average Grant-Date Fair Value Units Weighted-Average Grant-Date Fair Value Unvested at December 31, 2019 — $ — — $ — Granted 5,752 9.78 130,638 9.09 Vested — — — — Forfeited — — — — Unvested at September 30, 2020 5,752 $ 9.78 130,638 $ 9.09

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Stock For Redemption Based On Number Of Years Stock Held Table Text Block	The amount that we may pay to redeem stock for redemptions is the redemption price set forth in the following table which is based upon the number of years the stock is held: Number Years Held Redemption Price Less than 1 No Redemption Allowed 1 or more but less than 3 90.0% of Redemption Amount 3 or more but less than 4 95.0% of Redemption Amount 4 or more 100.0% of Redemption Amount

Selected Quarterly Data (Unau_2

Selected Quarterly Data (Unaudited) (Tables)	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Summary of Quarterly Financial Information	The following is a summary of quarterly financial information for the periods shown below: Three months ended September 30, 2019 December 31, 2019 March 31, 2020 June 30, 2020 September 30, 2020 Total revenues $ 29,588,014 $ 30,076,693 $ 30,298,123 $ 29,469,545 $ 31,363,122 Total operating expenses $ 27,773,486 $ 26,965,933 $ 61,368,274 $ 27,497,027 $ 26,992,137 Operating income (loss) $ 1,814,528 $ 7,055,456 $ (31,070,151 ) $ 1,972,518 $ 4,370,985 Net loss $ (9,541,579 ) $ (4,321,670 ) $ (37,743,581 ) $ (7,062,841 ) $ (4,456,497 ) Net loss attributable to common stockholders $ (8,214,826 ) $ (5,431,504 ) $ (35,073,951 ) $ (8,491,421 ) $ (6,259,114 ) Net loss per Class A Share-basic and diluted $ (0.14 ) $ (0.09 ) $ (0.59 ) $ (0.14 ) $ (0.10 ) Net loss per Class T Share-basic and diluted $ (0.14 ) $ (0.09 ) $ (0.59 ) $ (0.14 ) $ (0.10 )	The following is a summary of quarterly financial information for the years ended December 31, 2019 and 2018: Three months ended March 31, 2019 June 30, 2019 September 30, 2019 December 31, 2019 Total revenues $ 23,883,325 $ 25,980,517 $ 29,588,014 $ 30,076,693 Total operating expenses $ 21,934,203 $ 25,211,611 $ 27,773,486 $ 26,965,933 Operating income $ 1,949,122 $ 768,906 $ 1,814,528 $ 7,055,456 Net loss $ (8,948,317 ) $ (2,283,972 ) $ (9,541,579 ) $ (4,321,670 ) Net loss attributable to common stockholders $ (8,891,558 ) $ (2,212,445 ) $ (8,214,826 ) $ (5,431,504 ) Net loss per Class A Share-basic and diluted $ (0.15 ) $ (0.04 ) $ (0.14 ) $ (0.09 ) Net loss per Class T Share-basic and diluted $ (0.15 ) $ (0.04 ) $ (0.14 ) $ (0.09 ) Three months ended March 31, 2018 June 30, 2018 September 30, 2018 December 31, 2018 Total revenues $ 19,866,457 $ 20,045,516 $ 20,313,069 $ 20,187,215 Total operating expenses $ 16,010,116 $ 16,605,713 $ 15,836,436 $ 15,808,549 Operating income $ 3,856,341 $ 3,439,803 $ 4,476,633 $ 4,378,666 Net loss $ (667,047 ) $ (1,437,330 ) $ (457,278 ) $ (1,159,075 ) Net loss attributable to common stockholders $ (661,203 ) $ (1,427,056 ) $ (451,424 ) $ (1,158,694 ) Net loss per Class A Share-basic and diluted $ (0.01 ) $ (0.02 ) $ (0.01 ) $ (0.02 ) Net loss per Class T Share-basic and diluted $ (0.01 ) $ (0.02 ) $ (0.01 ) $ (0.02 )

Organization - Additional Infor

Organization - Additional Information (Detail) $ / shares in Units, ft² in Millions

Nov. 10, 2020ft²StorageUnitStorageFacilityState$ / sharesshares

Apr. 20, 2020$ / shares

Mar. 25, 2020shares

Oct. 29, 2019USD ($)

Jun. 26, 2019$ / shares

Jan. 09, 2017USD ($)shares

May 23, 2014USD ($)

Aug. 02, 2013USD ($)

Sep. 30, 2020USD ($)StorageFacilityState$ / sharesshares

Dec. 31, 2019USD ($)StorageFacilityState$ / sharesshares

Dec. 31, 2017USD ($)shares

Oct. 26, 2020USD ($)

May 14, 2020$ / shares

Dec. 31, 2018$ / sharesshares

Oct. 01, 2018State

Nov. 30, 2016shares

Organization And Nature Of Operations [Line Items]

Date of formation of company

Jan. 8, 2013

Jan. 8, 2013

Preferred Stock, shares authorize | shares

200,000,000

Preferred Stock, par value | $ / shares

$ 0.001

Shares issuable pursuant to distribution reinvestment plan

$ 95,000,000

$ 95,000,000

Sale of common shares

$ 17,311,370

Maximum purchase commitment amount

$ 200,000,000

Initial closing amount

150,000,000

$ 150,000,000

Additional purchase commitment amount

$ 50,000,000

Preferred stock, dividend rate, percentage

6.25%

Number of self storage facilities | StorageFacility

112

112

Number of states located for self storage facilities | State

17

17

10

Advisor, SS Toronto REIT Advisors, Inc., and SS Growth Advisor, LLC.

Organization And Nature Of Operations [Line Items]

Percentage of limited partnership interests

86.50%

86.70%

SAM and Affiliates

Organization And Nature Of Operations [Line Items]

Percentage of limited partnership interests owned by noncontrolling owners

13.50%

13.30%

Fifth To Tenth Anniversary

Organization And Nature Of Operations [Line Items]

Dividend rate percentage of increase on preferred stock

0.75%

After Tenth Anniversary

Organization And Nature Of Operations [Line Items]

Dividend rate percentage of increase on preferred stock

0.75%

Distribution Reinvestment Plan

Organization And Nature Of Operations [Line Items]

Common Stock, shares authorize | shares

100,900,000

Description for termination of offering

The DRP Offering may be terminated at any time upon 10 days’ prior written notice to stockholders.

The DRP Offering may be terminated at any time upon 10 days’ prior written notice to stockholders

Preferred Stock

Organization And Nature Of Operations [Line Items]

Preferred Stock, shares authorized | shares

200,000,000

200,000,000

200,000,000

Preferred Stock, par value | $ / shares

$ 0.001

Sale of common shares

$ 150,000,000

Maximum | Tenth Anniversary

Organization And Nature Of Operations [Line Items]

Preferred stock, dividend rate, percentage

9.00%

Primary Offering | Maximum

Organization And Nature Of Operations [Line Items]

Common stock, value authorize

$ 1,000,000,000

$ 1,000,000,000

Primary Offering | Minimum

Organization And Nature Of Operations [Line Items]

Sale of common shares

$ 1,500,000

Series A Convertible Preferred Stock

Organization And Nature Of Operations [Line Items]

Preferred Stock, shares authorized | shares

200,000

200,000

200,000

Class A Common stock

Organization And Nature Of Operations [Line Items]

Common Stock, shares authorize | shares

350,000,000

350,000,000

350,000,000

Common Stock, par value | $ / shares

$ 0.001

$ 0.001

$ 0.001

Estimated value per common share | $ / shares

$ 10.40

$ 10.66

Class A Common stock | Distribution Reinvestment Plan

Organization And Nature Of Operations [Line Items]

Selling price per share | $ / shares

$ 10.40

Class A Common stock | Common Stock

Organization And Nature Of Operations [Line Items]

Sale of common shares

$ 1,028

Number of common stock issued | shares

1,027,612

Class A Common stock | Common Stock | Distribution Reinvestment Plan

Organization And Nature Of Operations [Line Items]

Gross proceeds from issuance of common stock

$ 52,100,000

$ 41,700,000

Number of common stock issued | shares

5,000,000

4,000,000

Class A Common stock | Primary Offering | Common Stock

Organization And Nature Of Operations [Line Items]

Number of shares issued in offering | shares

48,000,000

Gross proceeds from issuance of common stock

$ 493,000,000

Class T Common stock

Organization And Nature Of Operations [Line Items]

Common Stock, shares authorize | shares

350,000,000

350,000,000

350,000,000

Common Stock, par value | $ / shares

$ 0.001

$ 0.001

$ 0.001

Estimated value per common share | $ / shares

$ 10.66

Class T Common stock | Distribution Reinvestment Plan

Organization And Nature Of Operations [Line Items]

Selling price per share | $ / shares

$ 10.40

Class T Common stock | Common Stock

Organization And Nature Of Operations [Line Items]

Sale of common shares

$ 565

Number of common stock issued | shares

564,591

Class T Common stock | Common Stock | Distribution Reinvestment Plan

Organization And Nature Of Operations [Line Items]

Gross proceeds from issuance of common stock

$ 8,000,000

$ 6,400,000

Number of common stock issued | shares

800,000

600,000

Class T Common stock | Primary Offering | Common Stock

Organization And Nature Of Operations [Line Items]

Number of shares issued in offering | shares

7,000,000

Gross proceeds from issuance of common stock

$ 73,000,000

SmartStop Self Storage, Inc.

Organization And Nature Of Operations [Line Items]

Number of self storage professionals and other personnel | StorageFacility

350

350

Strategic Storage Operating Partnership II, L.P.

Organization And Nature Of Operations [Line Items]

Date of formation of company

Jan. 9, 2013

Jan. 9, 2013

Advisor purchased a limited partnership interest in Operating Partnership

$ 200,000

Initial capital contribution

$ 1,000

SmartStop Asset Management

Organization And Nature Of Operations [Line Items]

Percentage of non-voting equity owned

15.00%

15.00%

SmartStop Asset Management | Investments in Majority-owned Subsidiaries

Organization And Nature Of Operations [Line Items]

Percentage of non-voting equity owned

15.00%

Self Administration Transaction | Strategic Storage Advisor II, LLC

Organization And Nature Of Operations [Line Items]

Percentage of voting membership interest

100.00%

Self Administration Transaction | Strategic Storage Property Management II, LLC

Organization And Nature Of Operations [Line Items]

Percentage of voting membership interest

100.00%

Self Administration Transaction | SS Growth Property Management, LLC

Organization And Nature Of Operations [Line Items]

Percentage of voting membership interest

100.00%

Subsequent Event [Member]

Organization And Nature Of Operations [Line Items]

Second and final closing amount

$ 50,000,000

$ 50,000,000

Subsequent Event [Member] | Class A Common stock

Organization And Nature Of Operations [Line Items]

Number of common stock issued | shares

4,300,000

Subsequent Event [Member] | Class T Common stock

Organization And Nature Of Operations [Line Items]

Number of common stock issued | shares

700,000

Subsequent Event [Member] | SST IV Merger Agreement [Member]

Organization And Nature Of Operations [Line Items]

Number of self storage units | StorageUnit

18,000

Net rentable area, primarily self storage space | ft²

2

Number of self storage facilities | StorageFacility

24

Number of states located for self storage facilities | State

9

Subsequent Event [Member] | SST IV Merger Agreement [Member] | Class A Common stock

Organization And Nature Of Operations [Line Items]

Common Stock, par value | $ / shares

$ 0.001

Subsequent Event [Member] | SST IV Merger Agreement [Member] | Canada

Organization And Nature Of Operations [Line Items]

Percentage of voting membership interest

50.00%

Common Stock, shares authorize | shares

5

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Additional Information (Detail) shares in Millions	3 Months Ended		6 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2020USD ($)shares	Sep. 30, 2019USD ($)	Jun. 30, 2020USD ($)shares	Sep. 30, 2020USD ($)SegmentTrademark	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)SegmentTrademarkshares	Dec. 31, 2018USD ($)shares	Dec. 31, 2017USD ($)shares	Jan. 31, 2020USD ($)	Jan. 01, 2020USD ($)	Jun. 28, 2019USD ($)	Jan. 31, 2019USD ($)	Jan. 01, 2019	Jan. 31, 2018USD ($)
Summary Of Significant Accounting Policies [Line Items]
Investments in Managed REITs											$ 5,600,000
Number of reportable business segments | Segment				2		2
Payments to acquire intangible assets				$ 0	$ 13,600,000	$ 13,600,000	$ 0	$ 4,400,000
Business acquisition, transaction costs	$ 470,000	$ 26,000		594,000	194,000	200,000	1,100,000	500,000
mpairment losses of real property assets recognized	0	0		0	0	0	0	0
Goodwill	53,643,331			53,643,331		78,372,980					$ 78,372,980
Trademarks acquired amount	0			0			0
Trademarks acquired	16,229,412			16,229,412		19,688,167
Accumulated amortization	45,200,000			45,200,000		40,400,000	31,900,000
Gross amounts of lease intangibles	46,600,000			$ 46,600,000		46,800,000	33,400,000
Accumulated amortization of debt issuance costs						$ 0	45,000,000,000
Underwriting commission				10.00%		10.00%
Maximum dealer manager commission fee percentage of proceeds from Primary Offering				3.00%		3.00%
Redemptions of common stock	$ 700,000		$ 1,300,000	$ 700,000		$ 4,900,000	$ 8,300,000	$ 2,200,000		$ 400,000		$ 1,300,000		$ 700,000
Redemptions of common stock (in shares) | shares	0.1		0.1			0.5	0.9	0.2
Minimum percentage of ordinary taxable income to be distributed to stockholders				90.00%		90.00%
Bad debt expense							$ 1,200,000	$ 1,300,000
Subsequent Event
Summary Of Significant Accounting Policies [Line Items]
Redemptions of common stock	$ 1,300,000			$ 1,300,000					$ 400,000
Redemptions of common stock (in shares) | shares	0.1
Real Estate Investment
Summary Of Significant Accounting Policies [Line Items]
Gains (losses) on exchange rate changes in equity investments recorded in other income (expense)	$ 300,000	$ 200,000		$ 300,000	$ 700,000	$ 900,000	$ 1,200,000
Former Dealer Manager
Summary Of Significant Accounting Policies [Line Items]
Monthly stockholder servicing fee accrual description							accrues daily in an amount equal to 1/365th of 1% of the purchase price per share
Underwriting commission						10.00%
Maximum dealer manager commission fee percentage of proceeds from Primary Offering				3.00%		3.00%
Class T Common stock
Summary Of Significant Accounting Policies [Line Items]
Monthly stockholder servicing fee accrual description				accrues daily in an amount equal to 1/365th of 1% of the purchase price per share	accrues daily in an amount equal to 1/365th of 1% of the purchase price per share	accrues daily in an amount equal to 1/365th of 1% of the purchase price per share
Class T Common stock | Former Dealer Manager
Summary Of Significant Accounting Policies [Line Items]
Monthly stockholder servicing fee accrual description				accrues daily in an amount equal to 1/365th of 1% of the purchase price per share		accrues daily in an amount equal to 1/365th of 1% of the purchase price per share	accrues daily in an amount equal to 1/365th of 1% of the purchase price per share
Class T Common stock | Primary Offering Dealer Manager Agreement
Summary Of Significant Accounting Policies [Line Items]
Percentage of gross proceeds from sale of shares				10.00%		10.00%
Class A Common stock | Primary Offering Dealer Manager Agreement
Summary Of Significant Accounting Policies [Line Items]
Percentage of gross proceeds from sale of shares				10.00%		10.00%
Redeemable Common Stock
Summary Of Significant Accounting Policies [Line Items]
Redemptions of common stock						$ 4,500,000		$ 1,500,000						$ 7,000,000
Non Revolving Debt
Summary Of Significant Accounting Policies [Line Items]
Debt issuance cost, gross	11,900,000			$ 11,900,000		11,900,000
Accumulated amortization of debt issuance costs	7,100,000			7,100,000		4,300,000	$ 1,000,000
Self Storage
Summary Of Significant Accounting Policies [Line Items]
Total estimated future amortization expense of intangible assets, year 2020	25,000,000,000			25,000,000,000
Goodwill	45,300,000			45,300,000		45,300,000
Total estimated future amortization expense of intangible assets, year 2020	100,000			100,000		5,000,000
Total estimated future amortization expense of intangible assets, year 2021	100,000			100,000		100,000
Total estimated future amortization expense of intangible assets, year 2022	100,000			100,000		100,000
Total estimated future amortization expense of intangible assets, year 2023	100,000			100,000		100,000
Total estimated future amortization expense of intangible assets, thereafter	1,000,000			$ 1,000,000		1,000,000
Total estimated future amortization expense of intangible assets, year 2024						$ 100,000
Minimum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life				3 years		3 years
Maximum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life				5 years		5 years
SmartStop Trademark
Summary Of Significant Accounting Policies [Line Items]
Amortization period of intangible assets				8 years		8 years
Trademarks with indefinite lives						$ 18,700,000
Strategic Storage Trademark
Summary Of Significant Accounting Policies [Line Items]
Total estimated future amortization expense of intangible assets, year 2020	35,000			$ 35,000
Amortization period of intangible assets				7 years		7 years
Total estimated future amortization expense of intangible assets, year 2020	140,000			$ 140,000		$ 220,000
Total estimated future amortization expense of intangible assets, year 2021	140,000			140,000		220,000
Total estimated future amortization expense of intangible assets, year 2022	140,000			140,000		220,000
Total estimated future amortization expense of intangible assets, year 2023	70,000			70,000		220,000
Total estimated future amortization expense of intangible assets, thereafter	0			$ 0		$ 108,000
Trademarks
Summary Of Significant Accounting Policies [Line Items]
Amortization period of intangible assets				15 years		15 years
Strategic Storage
Summary Of Significant Accounting Policies [Line Items]
Amortization period of intangible assets						5 years
Trademarks acquired						$ 1,100,000
Accumulated amortization						100,000
Self Administration Transaction
Summary Of Significant Accounting Policies [Line Items]
Total estimated future amortization expense of intangible assets, year 2020	1,000,000			$ 1,000,000
Percentage of ownership interest in joint venture													100.00%
Goodwill	78,400,000			78,400,000
Trademarks acquired	19,800,000			$ 19,800,000		$ 19,800,000
Number of trademarks acquired | Trademark				2		2
Accumulated amortization	6,300,000			$ 6,300,000		$ 2,900,000
Total estimated future amortization expense of intangible assets, year 2020	2,900,000			2,900,000		5,700,000
Total estimated future amortization expense of intangible assets, year 2021	2,900,000			2,900,000		4,600,000
Total estimated future amortization expense of intangible assets, year 2022	2,900,000			2,900,000		4,600,000
Total estimated future amortization expense of intangible assets, year 2023	1,800,000			1,800,000		4,600,000
Total estimated future amortization expense of intangible assets, thereafter	300,000			300,000
Gross amounts of lease intangibles	18,100,000			18,100,000		26,500,000
Total estimated future amortization expense of intangible assets, year 2024						4,100,000
Self Administration Transaction | Tenant Programs
Summary Of Significant Accounting Policies [Line Items]
Percentage of ownership interest acquired in joint venture													50.00%
New Accounting Pronouncement, Early Adoption, Effect
Summary Of Significant Accounting Policies [Line Items]
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest						1,700,000
Investments in and Advances to Managed REITs
Summary Of Significant Accounting Policies [Line Items]
Investments in Managed REITs	7,900,000			7,900,000		5,800,000
Investments in and Advances to Managed REITs | Managed REITS
Summary Of Significant Accounting Policies [Line Items]
Receivables due from related parties	$ 320,000			$ 320,000		$ 275,000

Estimated Useful Lives used to

Estimated Useful Lives used to Depreciate Real Property Assets (Detail)	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Land
Property Plant And Equipment [Line Items]
Standard Depreciable Life	Not Depreciated	Not Depreciated
Buildings | Minimum
Property Plant And Equipment [Line Items]
Standard Depreciable Life	30 years	30 years
Buildings | Maximum
Property Plant And Equipment [Line Items]
Standard Depreciable Life	40 years	40 years
Site Improvements | Minimum
Property Plant And Equipment [Line Items]
Standard Depreciable Life	7 years	7 years
Site Improvements | Maximum
Property Plant And Equipment [Line Items]
Standard Depreciable Life	10 years	10 years

Summary of Fixed Rate Notes Pay

Summary of Fixed Rate Notes Payable (Detail) - Fixed Rate Secured Debt - USD ($)	Sep. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	$ 320,200,000	$ 311,700,000	$ 200,600,000
Carrying Value	$ 302,205,553	$ 302,820,786	$ 207,357,391

Schedule of Activity in Real Es

Schedule of Activity in Real Estate Facilities (Detail) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Real estate facilities
Real estate facilities, beginning balance	$ 1,173,825,368	$ 820,296,026	$ 829,679,477
Real estate acquisitions	812,892	334,139,296
Construction in process placed in service	13,389,703
Facilities acquired through merger with SSGT	812,892	334,139,296
Asset disposals		(11,688,993)
Corporate office acquired through Self Administration Transaction		351,070,238
Other facility acquisitions		10,430,942
Impact of foreign exchange rate changes	(4,145,778)	6,582,603	(11,915,703)
Improvements and additions	7,155,135	7,565,494	2,532,252
Real estate facilities, ending balance	1,191,037,320	1,173,825,368	820,296,026
Accumulated depreciation
Accumulated depreciation, beginning balance	(83,692,491)	(54,264,685)	(34,686,973)
Asset disposals		202,416
Depreciation expense	(23,136,367)	(29,188,668)	(20,134,068)
Impact of foreign exchange rate changes	272,635	(441,554)	556,356
Accumulated depreciation, ending balance	$ (106,556,223)	(83,692,491)	$ (54,264,685)
Self Administration Transaction
Real estate facilities
Corporate office acquired through Self Administration Transaction		$ 6,500,000

Real Estate Facilities - Additi

Real Estate Facilities - Additional Information (Detail)

Sep. 01, 2020CAD ($)

Jul. 21, 2020USD ($)ft²StorageFacility

Jun. 02, 2020CAD ($)

Oct. 18, 2019USD ($)

Jul. 11, 2019USD ($)

Oct. 01, 2018USD ($)StorageFacilityState$ / sharesshares

Jun. 28, 2018CAD ($)

Jan. 31, 2019CAD ($)

Jan. 31, 2018

Sep. 30, 2019USD ($)

Dec. 31, 2019USD ($)State

Dec. 31, 2018USD ($)

Dec. 31, 2017USD ($)

Sep. 30, 2020USD ($)State

Jan. 24, 2019USD ($)$ / shares

Restructuring Cost And Reserve [Line Items]

Repayment of debt

$ 141,088,724

Principal borrowing

500,178,000

Number of operating self storage facilities | StorageFacility

28

Number of states for self storage facilities | State

10

17

17

Number of operating self storage facilities | StorageFacility

1

Debt Instrument Carrying Amount

$ 719,769,887

$ 717,069,469

Gain on sale of real estate

3,944,696

$ 0

$ 0

Repayments of debt

$ 141,088,724

$ 251,732,077

$ 72,513,082

$ 130,671,050

SmartCentres

Restructuring Cost And Reserve [Line Items]

Percentage of units to be subscribed at closing in limited partnership

50.00%

SmartCentres

Restructuring Cost And Reserve [Line Items]

Percentage of units to be subscribed at closing in limited partnership

50.00%

Subscription price of units in limited partnership

$ 3,800,000

Subscription price as percentage of agreed upon fair market value of land to be contributed to the Limited Partnership

50.00%

East York Lot

Restructuring Cost And Reserve [Line Items]

Fair market value

$ 7,600,000

Senior Term Loan

Restructuring Cost And Reserve [Line Items]

Principal borrowing

72,000,000

Fixed Rate Secured Debt

Restructuring Cost And Reserve [Line Items]

Principal borrowing

$ 89,178,000

Canada

Restructuring Cost And Reserve [Line Items]

Number of operating self storage facilities | StorageFacility

1

SS Growth Advisor LLC | Capital Unit, Class A

Restructuring Cost And Reserve [Line Items]

Business acquisition partnership units issued | shares

396,000

Acquisition Of Self Storage Facility [Member] | Riverview, Florida

Restructuring Cost And Reserve [Line Items]

Number of units added to existing self storage facility | StorageFacility

170

Rentable area added to existing self storage facility | ft²

25,000

Purchase price

$ 800,000

Strategic Storage Growth Trust, Inc

Restructuring Cost And Reserve [Line Items]

Common Stock, par value | $ / shares

$ 0.001

Sale price per share | $ / shares

$ 12

$ 12

Repayment of debt

$ 141,000,000

Principal borrowing

$ 500,000,000

Purchase price

$ 350,448,960

Debt Instrument Carrying Amount

$ 19,000,000

SS Growth Operating Partnership, L.P

Restructuring Cost And Reserve [Line Items]

Limited partners' capital account, units converted in to percentage

1.127%

SS Growth Operating Partnership, L.P | SmartCentres

Restructuring Cost And Reserve [Line Items]

Percentage of units to be subscribed at closing in limited partnership

50.00%

SS Growth Operating Partnership, L.P | East York Lot

Restructuring Cost And Reserve [Line Items]

Percentage of units to be subscribed at closing in limited partnership

50.00%

Gilbert Property

Restructuring Cost And Reserve [Line Items]

Purchase price

$ 10,000,000

Gilbert Property | Senior Term Loan

Restructuring Cost And Reserve [Line Items]

Debt Instrument Carrying Amount

4,300,000

Gilbert Property | Fixed Rate Secured Debt

Restructuring Cost And Reserve [Line Items]

Debt Instrument Carrying Amount

5,700,000

Gilbert Property | Smart Stop Asset Management LLC

Restructuring Cost And Reserve [Line Items]

Business acquisition fees paid to advisor

$ 175,000

San Antonio II Property

Restructuring Cost And Reserve [Line Items]

Sales price

$ 16,100,000

Gain on sale of real estate

3,900,000

San Antonio II Property | Senior Term Loan

Restructuring Cost And Reserve [Line Items]

Repayments of debt

5,400,000

San Antonio II Property | Fixed Rate Secured Debt

Restructuring Cost And Reserve [Line Items]

Repayments of debt

$ 9,900,000

Strategic Storage Trust IV, Inc.

Restructuring Cost And Reserve [Line Items]

Proceeds from sale of interest in partnership unit

$ 4,700,000

Proceeds from land and development cost incurred

4,600,000

Acquisition cost that were expensed

$ 100,000

Etobicoke Property [Member]

Restructuring Cost And Reserve [Line Items]

Purchase price

$ 2,200,000

Scarborough Property [Member]

Restructuring Cost And Reserve [Line Items]

Purchase price

$ 2,200,000

Summary of Reconciles Total Con

Summary of Reconciles Total Consideration Transferred (Detail) - Strategic Storage Growth Trust, Inc	Oct. 01, 2018USD ($)
Fair value of consideration transferred:
Cash	$ 346,231,561
Issuance of limited partnership units in our Operating Partnership to SS Growth Advisor, LLC	4,217,399
Total consideration transferred	$ 350,448,960

Summary of Reconciles Total C_2

Summary of Reconciles Total Consideration Transferred (Parenthetical) (Detail) - USD ($)	Oct. 01, 2018	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Debt Instrument Carrying Amount		$ 717,069,469		$ 717,069,469		$ 719,769,887
Business acquisition, transaction costs		$ 470,000	$ 26,000	$ 594,000	$ 194,000	$ 200,000	$ 1,100,000	$ 500,000
Strategic Storage Growth Trust, Inc
Business Acquisition [Line Items]
Cash consideration	$ 346,231,561
Cash paid to shareholders	320,000,000
Debt Instrument Carrying Amount	19,000,000
Other liabilities paid	5,000,000
Business acquisition, transaction costs	$ 1,000,000

Summary of Relative Fair Values

Summary of Relative Fair Values of Assets Acquired and Liabilities Assumed (Detail) - USD ($)		Dec. 31, 2019		Jun. 28, 2019	Oct. 01, 2018
Assets Acquired:
Land				$ 975,000
Buildings		$ 344,570,238		5,389,000
Construction in process	[1]	5,370,773
Intangible assets				1,600,000
Cash and cash equivalents				36,443
Other assets				1,084,629
Total assets acquired		$ 363,512,776	[2]	60,267,071
Liabilities assumed:
Accounts payable and accrued liabilities				722,286
Total liabilities assumed				27,357,066
Total net assets acquired				$ 32,910,005
Strategic Storage Growth Trust, Inc
Assets Acquired:
Land					$ 62,261,573
Buildings					255,743,767
Site improvements					16,133,956
Construction in process					5,370,773
Intangible assets					13,571,765
Cash and cash equivalents					692,965
Other assets					6,536,838
Total assets acquired					360,311,637
Liabilities assumed:
Debt					5,038,435
Accounts payable and accrued liabilities					4,824,242
Total liabilities assumed					9,862,677
Total net assets acquired					$ 350,448,960
[1]	Construction in process relates to the Torbarrie property in Toronto, Canada, which is a self storage property under construction. Such facility partially opened in March 2020.
[2]	The allocations noted above are based on a determination of the relative fair value of the total consideration provided and represent the amount paid including capitalized acquisition costs.

Summary of Purchase Price Alloc

Summary of Purchase Price Allocation for Real Estate Related Assets Acquired (Detail) - USD ($)		12 Months Ended
		Dec. 31, 2019		Jun. 28, 2019
Business Acquisition [Line Items]
Real Estate Assets		$ 344,570,238		$ 5,389,000
Construction in Process	[1]	5,370,773
Intangibles		13,571,765
Total assets acquired		363,512,776	[2]	$ 60,267,071
Debt Issued or Assumed		199,078,846
2019 Revenue	[3]	21,971,385
2019 Property Operating Income	[3],[4]	$ 11,988,096
SSGT Mergers
Business Acquisition [Line Items]
Acquisition Date	[5]	Jan. 24, 2019
Real Estate Assets	[5]	$ 334,139,296
Construction in Process	[1],[5]	5,370,773
Intangibles	[5]	13,571,765
Total assets acquired	[2],[5]	353,081,834
Debt Issued or Assumed	[5]	193,376,846
2019 Revenue	[3],[5]	21,909,300
2019 Property Operating Income	[3],[4],[5]	$ 12,032,555
Riggs Rd - Gilbert
Business Acquisition [Line Items]
Acquisition Date	[6]	Jul. 11, 2019
Real Estate Assets	[6]	$ 10,430,942
Construction in Process	[1],[6]	0
Intangibles		0
Total assets acquired	[2],[6]	10,430,942
Debt Issued or Assumed	[6]	5,702,000
2019 Revenue	[3],[6]	62,085
2019 Property Operating Income	[3],[4],[6]	$ (44,459)
[1]	Construction in process relates to the Torbarrie property in Toronto, Canada, which is a self storage property under construction. Such facility partially opened in March 2020.
[2]	The allocations noted above are based on a determination of the relative fair value of the total consideration provided and represent the amount paid including capitalized acquisition costs.
[3]	The operating results of the self storage properties acquired during the year ended December 31, 2019 have been included in our consolidated statements of operations since their respective acquisition date.
[4]	Property operating income excludes corporate general and administrative expenses, asset management fees, interest expenses, depreciation, amortization and acquisition expenses.
[5]	SSGT had stated investment objectives to acquire opportunistic self storage properties, including development, and lease-up properties. As a result, many of its properties were not physically and/or economically stabilized as of the date of the SSGT Mergers.
[6]	The Gilbert Property was recently developed and acquired, with 0% occupancy as of its acquisition date.

Summary of Purchase Price All_2

Summary of Purchase Price Allocation for Real Estate Related Assets Acquired (Parenthetical) (Detail)	Jul. 11, 2019
Gilbert Property
Business Acquisition [Line Items]
Occupancy percentage	0.00%

Self Administration Transacti_4

Self Administration Transaction - Additional Information (Detail)	Jun. 28, 2019USD ($)Employee$ / sharesshares	Sep. 30, 2020USD ($)	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Jan. 24, 2019USD ($)
Business Acquisition [Line Items]
Legal fees and fees and expenses of professional and financial advisors					$ 1,600,000	$ 1,600,000
Gain resulting from acquisition of unconsolidated affiliates		$ 0	$ 0	$ 0	$ 8,017,353	8,017,353	$ 0	$ 0
Increase in liability estimated fair value contingent earnout						200,000
Estimated fair value of the contingent earnout						31,100,000
Incremental assets under management		$ 219,000,000		$ 219,000,000		$ 135,000,000
Principal borrowing									$ 500,178,000
Debt instrument, interest rate		4.65%		4.65%		4.65%			5.00%
Debt instrument maturity date				Jan. 24, 2022
Debt instrument, basis spread on variable rate				1.95%		1.95%
Noncontrolling interests in our Operating Partnership		$ 61,270,970		$ 61,270,970		$ 71,988,256	$ (77,756)
Agreement term	3 years
Form S-3
Business Acquisition [Line Items]
Registration rights agreement filing period	30 days
Form S-11
Business Acquisition [Line Items]
Registration rights agreement filing period	60 days
Strategic Storage Advisor II, LLC
Business Acquisition [Line Items]
Partnership units exchanged | shares	20,000
Cash proceeds from partnership units exchanged	$ 200,000
Gain (loss) from partners capital account units exchanged	0
Fair value of operating partnership units and special limited partnership interests contributed	18,800,000
Noncontrolling interests in our Operating Partnership	9,100,000
Ladera Office Loan
Business Acquisition [Line Items]
Principal borrowing	$ 4,200,000
Debt instrument, interest rate	4.29%
Debt instrument maturity date	Nov. 1, 2026
KeyBank Tenant Program Loan
Business Acquisition [Line Items]
Principal borrowing	$ 15,000,000
Debt instrument, interest rate						5.90%
Debt instrument, description of variable rate basis						1-month Libor plus 350 basis points
Debt instrument, basis spread on variable rate						3.50%
Fair Value, Inputs, Level 3
Business Acquisition [Line Items]
Alternative investment, measurement input	5.16%
Minority and Marketability Discount | Fair Value, Inputs, Level 3
Business Acquisition [Line Items]
Alternative investment, measurement input	0.05
Contribution Agreement
Business Acquisition [Line Items]
Percentage of fair value of equity interests	50.00%
Gain resulting from acquisition of unconsolidated affiliates	$ 8,000,000
Contribution Agreement | SmartStop Asset Management
Business Acquisition [Line Items]
Percentage of voting membership interest	100.00%
Number of on-site self storage employees | Employee	350
Cash	$ 769,126
Debt assumption	$ 15,000,000
Operating Partnership Agreement
Business Acquisition [Line Items]
Number of limited partnership units | shares	20,000
Cash received	$ 200,000
Membership Interest Purchase Agreement | Terrace Rd LLC
Business Acquisition [Line Items]
Percentage of voting membership interest	100.00%
Cash	$ 2,300,000
Debt assumption	4,200,000
Consideration transferred	$ 6,500,000
Class A-1 Units | Contribution Agreement | SmartStop Asset Management
Business Acquisition [Line Items]
Number of limited partnership units | shares	8,698,956
Class A-1 Units | Operating Partnership Agreement
Business Acquisition [Line Items]
Lock-up expiration date				Jun. 28, 2021		Jun. 28, 2021
Conversion of stock, description				The Class A-1 Units are subject to the general restrictions on transfer contained in the Operating Partnership Agreement. In addition, until June 28, 2021 (the “Lock-Up Expiration”), the Class A-1 Units may not be sold, pledged, or otherwise transferred or encumbered except in certain limited circumstances set forth in the Contribution Agreement. The Class A-1 Units are otherwise entitled to all rights and duties of the Class A limited partnership units in the Operating Partnership, including cash distributions and the allocation of any profits or losses in the Operating Partnership. The Class A-2 Units may convert into Class A-1 Units as earnout consideration, as described below. The Class A-2 Units are not entitled to cash distributions or the allocation of any profits or losses in the Operating Partnership until the Class A-2 Units are converted into Class A-1 Units		The Class A-1 Units are subject to the general restrictions on transfer contained in the Operating Partnership Agreement. In addition, until June 28, 2021 (the “Lock-Up Expiration”), the Class A-1 Units may not be sold, pledged, or otherwise transferred or encumbered except in certain limited circumstances set forth in the Contribution Agreement. The Class A-1 Units are otherwise entitled to all rights and duties of the Class A limited partnership units in the Operating Partnership, including cash distributions and the allocation of any profits or losses in the Operating Partnership. The Class A-2 Units may convert into Class A-1 Units as earnout consideration, as described below. The Class A-2 Units are not entitled to cash distributions or the allocation of any profits or losses in the Operating Partnership until the Class A-2 Units are converted into Class A-1 Units.
Class A-2 Units | Contribution Agreement | SmartStop Asset Management
Business Acquisition [Line Items]
Number of limited partnership units | shares	3,283,302
Class A-2 Units | Operating Partnership Agreement
Business Acquisition [Line Items]
Earnout unit exchange per share | $ / shares	$ 10.66
Class of unit expiration year	7 years
Class A-2 Units | Operating Partnership Agreement | Unit Conversion Feature A
Business Acquisition [Line Items]
Class of unit conversion percentage	33.33%
Class A-2 Units | Operating Partnership Agreement | Unit Conversion Feature A | Minimum
Business Acquisition [Line Items]
Incremental AUM under operating partnership	$ 300,000,000
Class A-2 Units | Operating Partnership Agreement | Unit Conversion Feature B
Business Acquisition [Line Items]
Class of unit conversion percentage	33.33%
Class A-2 Units | Operating Partnership Agreement | Unit Conversion Feature B | Minimum
Business Acquisition [Line Items]
Incremental AUM under operating partnership	$ 500,000,000
Class A-2 Units | Operating Partnership Agreement | Unit Conversion Feature C
Business Acquisition [Line Items]
Class of unit conversion percentage	33.33%
Class A-2 Units | Operating Partnership Agreement | Unit Conversion Feature C | Minimum
Business Acquisition [Line Items]
Incremental AUM under operating partnership	$ 700,000,000

Self Administration Transacti_5

Self Administration Transaction - Summary of Estimated Fair Value Consideration Transferred (Detail)	Jun. 28, 2019USD ($)
Fair value of consideration transferred:
Total	$ 111,300,000
Contribution Agreement and Membership Interest Purchase Agreement
Fair value of consideration transferred:
Cash	3,918,185
Total consideration transferred	98,461,185
Fair value of our preexisting 50% equity interests	12,800,000
Total	111,261,185
Contribution Agreement and Membership Interest Purchase Agreement | Class A-1 Units
Fair value of consideration transferred:
Units	63,643,000
Contribution Agreement and Membership Interest Purchase Agreement | Class A-2 Units (contingent earnout)
Fair value of consideration transferred:
Units	$ 30,900,000

Self Administration Transacti_6

Self Administration Transaction - Summary of Estimated Fair Value Consideration Transferred (Parenthetical) (Detail) - Contribution Agreement $ in Millions	Jun. 28, 2019USD ($)
Business Acquisition [Line Items]
Fair market value	$ 0.5
Percentage of fair value of equity interests	50.00%

Self Administration Transacti_7

Self Administration Transaction - Summary of Estimated Fair Values of Assets Acquired and Liabilities Assumed (Detail) - USD ($)	Sep. 30, 2020	Dec. 31, 2019		Jun. 28, 2019
Assets Acquired:
Cash and cash equivalents				$ 36,443
Restricted cash				94,999
Land				975,000
Buildings		$ 344,570,238		5,389,000
Site Improvements				136,000
Equipment, furniture and fixtures				651,000
Investments in Managed REITs				5,600,000
Other assets				1,084,629
Intangibles - customer relationships				1,600,000
Trademarks				19,800,000
Intangibles - management contracts				24,900,000
Total assets acquired		363,512,776	[1]	60,267,071
Liabilities assumed:
Debt				19,219,126
Accounts payable and accrued liabilities				722,286
Deferred tax liabilities, net				7,415,654
Total liabilities assumed				27,357,066
Net identifiable assets acquired				32,910,005
Goodwill	$ 53,643,331	$ 78,372,980		78,372,980
Non-controlling interest related to consolidated Tenant Programs joint ventures				(21,800)
Net assets acquired				$ 111,261,185
[1]	The allocations noted above are based on a determination of the relative fair value of the total consideration provided and represent the amount paid including capitalized acquisition costs.

Self Administration Transacti_8

Self Administration Transaction - Intangible Assets, Goodwill and Certain Other Assets and Liabilities - Additional Information (Detail) - USD ($)	Mar. 31, 2020	Mar. 31, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Finite Lived Intangible Assets [Line Items]
Goodwill impairment charges			$ 0	$ 0	$ 36,465,732	$ 0
Self Administration Transaction
Finite Lived Intangible Assets [Line Items]
Impairment charges		$ 11,700,000
Estimated fair value of contingent earnout liability	$ 23,900,000	23,900,000	$ 26,000,000		$ 26,000,000		$ 31,100,000
Self Administration Transaction | COVID-19
Finite Lived Intangible Assets [Line Items]
Investment impairment charges	4,400,000
Self Administration Transaction | Managed REIT Platform
Finite Lived Intangible Assets [Line Items]
Goodwill impairment charges		24,700,000
Deferred tax liabilities	$ 2,400,000
Self Administration Transaction | Trademarks
Finite Lived Intangible Assets [Line Items]
Impairment charges		3,300,000
Self Administration Transaction | Management Contracts of SST IV
Finite Lived Intangible Assets [Line Items]
Impairment charges		2,200,000
Self Administration Transaction | Management Contracts of SSGTII
Finite Lived Intangible Assets [Line Items]
Impairment charges		$ 6,200,000

Pro Forma Financial Informati_3

Pro Forma Financial Information (Unaudited) - Summary of Consolidated Results of Operations on Pro Forma Basis (Detail) - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Business Acquisition, Pro Forma Information [Abstract]
Pro forma revenue	$ 91,130,790	$ 83,770,481	$ 113,886,094	$ 84,190,199
Pro forma operating expenses	(115,057,438)	(76,609,917)	(103,374,709)	(68,661,890)
Pro forma net income (loss) attributable to common stockholders	$ (49,248,355)	$ (22,486,573)	$ (27,684,937)	$ (3,296,311)

Pro Forma Financial Informati_4

Pro Forma Financial Information (Unaudited) - Additional Information (Detail) - USD ($) $ in Millions	9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Business Acquisition, Pro Forma Information [Abstract]
Pro forma acquisition related expenses	$ 0	$ 1.6	$ 1.6	$ 0

Schedule of Summarized Real Est

Schedule of Summarized Real Estate Secured Debt (Detail) - USD ($)		Jan. 24, 2019	Sep. 30, 2020		Dec. 31, 2019		Dec. 31, 2018
Debt Instrument [Line Items]
Debt Instrument Carrying Amount			$ 717,069,469		$ 719,769,887
Premium on secured debt, net			494,168		592,505
Debt issuance costs, net			(4,774,227)		(7,629,390)		$ (36,907)
Total			$ 712,789,410		$ 712,733,002		406,084,103
Debt Instrument Fixed Rate		5.00%	4.65%		4.65%
Debt Instrument, Interest Rate			2.45%		3.95%
Debt Instrument Maturity Date			Jan. 24, 2022
Amended KeyBank Credit Facility
Debt Instrument [Line Items]
Debt Instrument Carrying Amount	[1]				$ 0		98,782,500
Debt Instrument, Interest Rate					5.00%
$11M KeyBank Subordinate Loan
Debt Instrument [Line Items]
Debt Instrument Carrying Amount	[2]				$ 0		11,000,000
Debt Instrument, Interest Rate					6.25%
KeyBank CMBS Loan
Debt Instrument [Line Items]
Debt Instrument Carrying Amount		$ 104,000,000
Debt Instrument Fixed Rate		5.00%
Debt Instrument Maturity Date		Feb. 1, 2029	Feb. 1, 2029
Canadian CitiBank Loan
Debt Instrument [Line Items]
Debt Instrument Carrying Amount			$ 83,274,660	[3]	$ 85,500,660	[4]	72,846,480	[4]
Debt Instrument, Interest Rate			2.73%		4.24%
Debt Instrument Maturity Date			Oct. 9, 2021		Oct. 9, 2020	[4]
CMBS SASB Loan
Debt Instrument [Line Items]
Debt Instrument Carrying Amount			$ 235,000,000	[5]	$ 235,000,000	[6]	0	[6]
Debt Instrument, Interest Rate			3.15%		4.76%
Debt Instrument Maturity Date			Feb. 9, 2022	[5]	Feb. 9, 2022	[6]
Secured Loan
Debt Instrument [Line Items]
Debt Instrument Carrying Amount	[8]		$ 85,512,000	[7]	$ 85,512,000	[9]	0	[9]
Debt Instrument, Interest Rate			3.00%	[7],[8]	4.26%
Debt Instrument Maturity Date	[8]		Jan. 24, 2022	[7]	Jan. 24, 2022	[9]
Stoney Creek Loan
Debt Instrument [Line Items]
Debt Instrument Carrying Amount			$ 5,446,364	[10]	$ 5,591,950	[11]	0	[11]
Debt Instrument, Interest Rate			4.65%	[10]	5.90%
Debt Instrument Maturity Date			Oct. 1, 2021	[10]	Oct. 1, 2021	[11]
Torbarrie Loan
Debt Instrument [Line Items]
Debt Instrument Carrying Amount			$ 6,125,060	[12]	$ 5,936,996	[13]	0	[13]
Debt Instrument, Interest Rate			4.65%	[12]	5.90%
Debt Instrument Maturity Date			Sep. 1, 2021	[12]	Sep. 1, 2021	[13]
Ladera Office Loan
Debt Instrument [Line Items]
Debt Instrument Carrying Amount			$ 4,119,943		$ 4,179,994		0
Debt Instrument, Interest Rate			4.29%		4.29%
Debt Instrument Maturity Date			Nov. 1, 2026		Nov. 1, 2026
Fixed Rate Secured Debt
Debt Instrument [Line Items]
Premium on secured debt, net			$ 494,168		$ 592,505		1,228,996
Debt issuance costs, net			(4,774,227)		(7,629,390)		(3,385,395)
Total			712,789,410		$ 712,733,002
Debt Instrument Maturity Date					Jan. 24, 2022
Fixed Rate Secured Debt | Raleigh Myrtle Beach Promissory Note
Debt Instrument [Line Items]
Debt Instrument Carrying Amount	[14]				$ 0		11,878,396
Debt Instrument Fixed Rate					5.73%
Fixed Rate Secured Debt | Oakland and Concord Loan
Debt Instrument [Line Items]
Debt Instrument Carrying Amount	[15]				$ 0		19,483,127
Debt Instrument Fixed Rate					3.95%
Fixed Rate Secured Debt | KeyBank CMBS Loan
Debt Instrument [Line Items]
Debt Instrument Carrying Amount	[16]		$ 95,000,000		$ 95,000,000		95,000,000
Debt Instrument Fixed Rate			3.89%		3.89%
Debt Instrument Maturity Date			Aug. 1, 2026		Aug. 1, 2026	[16]
Fixed Rate Secured Debt | KeyBank Florida CMBS Loan
Debt Instrument [Line Items]
Debt Instrument Carrying Amount	[17]		$ 52,000,000		$ 52,000,000		52,000,000
Debt Instrument Fixed Rate			4.65%		4.65%
Debt Instrument Maturity Date			May 1, 2027		May 1, 2027	[17]
Fixed Rate Secured Debt | Midland North Carolina CMBS Loan
Debt Instrument [Line Items]
Debt Instrument Carrying Amount	[18]		$ 46,591,442		$ 47,048,287		47,249,999
Debt Instrument Fixed Rate			5.31%		5.31%
Debt Instrument Maturity Date			Aug. 1, 2024		Aug. 1, 2024	[18]
Fixed Rate Secured Debt | CMBS Loan
Debt Instrument [Line Items]
Debt Instrument Carrying Amount			$ 104,000,000	[19]	$ 104,000,000	[20]	$ 0	[20]
Debt Instrument Fixed Rate			5.00%	[19]	5.00%
Debt Instrument Maturity Date			Feb. 1, 2029	[19]	Feb. 1, 2029	[20]
[1]	As of December 31, 2018, this facility encumbered 21 properties (Xenia, Sidney, Troy, Greenville, Washington Court House, Richmond, Connersville, Vallejo, Port St. Lucie I, Sacramento, Sonoma, Las Vegas I, Las Vegas II, Las Vegas III, Baltimore, Aurora II, Plantation, Wellington, Naples, Port St. Lucie II, and Doral). This loan was repaid in conjunction with the SSGT Merger financing.
[2]	This variable rate loan encumbered 49% of the equity interest in the entities that own the 34 properties (the 29 properties encumbered by the KeyBank CMBS Loan and the five properties encumbered by the KeyBank Florida CMBS Loan), and was subordinate to the existing KeyBank CMBS Loan and KeyBank Florida CMBS Loan. This loan was repaid in conjunction with the SSGT Merger financing.
[3]	This variable rate loan encumbers 10 of our Canadian properties and the amounts shown above are in USD based on the foreign exchange rate in effect of the dates presented. We purchased interest rate caps that cap CDOR at 3.0% until October 15, 2021. The separate assets of these encumbered properties are not available to pay our other debts.
[4]	This variable rate loan encumbers 10 of our Canadian properties and the amount shown above is in USD based on the foreign exchange rates in effect as of the dates presented. We have purchased interest rate caps that cap CDOR at 3.0% until October 15, 2021. The separate assets of these encumbered properties are not available to pay our other debts.
[5]	This variable rate loan encumbers 29 properties (Morrisville, Cary, Raleigh, Vallejo, Xenia, Sidney, Troy, Greenville, Washington Court House, Richmond, Connersville, Port St Lucie, Sacramento, Concord, Oakland, Wellington, Doral, Naples, Baltimore, Aurora, Jones Blvd - Las Vegas, Russell Rd - Las Vegas, Riverside, Stockton, Azusa, Romeoville, Elgin, San Antonio, Kingwood). The separate assets of these encumbered properties are not available to pay our other debts.
[6]	This variable rate loan encumbers our 29 properties (Morrisville, Cary, Raleigh, Vallejo, Xenia, Sidney, Troy, Greenville, Washington Court House, Richmond, Connersville, Port St Lucie, Sacramento, Concord, Oakland, Wellington, Doral, Naples, Baltimore, Aurora, Jones Blvd - Las Vegas, Russell Rd - Las Vegas, Riverside, Stockton, Azusa, Romeoville, Elgin, San Antonio, Kingwood). In June 2019, we purchased an interest rate swap whereby LIBOR is fixed at 1.79% though February 15, 2022. The separate assets of these encumbered properties are not available to pay our other debts.
[7]	On January 29, 2019, we entered into a $161.2 million notional interest rate swap whereby LIBOR was fixed at approximately 2.6% until August 1, 2020. On October 29, 2019, in connection with the pay off of the Senior Term Loan, we terminated approximately $75.7 million of this interest rate swap which required a settlement payment of approximately $0.6 million. The remaining $85.5 million of the interest rate swap effectively fixed the interest rate on the Secured Loan at 5.1% until August 1, 2020. To continue hedging our interest rate risk related to this loan, we purchased an interest rate cap on August 3, 2020 with a notional amount of $80 million that effectively caps LIBOR at 0.5% through August 2, 2021.
[8]	This variable rate loan encumbers 16 properties (Colorado Springs, Aurora, Phoenix, 3173 Sweeten Creek Rd - Asheville, Elk Grove, Garden Grove, Deaverview Rd - Asheville, Highland Center Blvd - Asheville, Sarasota, Mount Pleasant, Pembroke Pines, Riverview, Eastlake, McKinney, Hualapai Way - Las Vegas, Gilbert). The separate assets of these encumbered properties are not available to pay our other debts.
[9]	On January 29, 2019, we entered into a $161.2 million notional interest rate swap whereby LIBOR was fixed at approximately 2.6% until August 1, 2020. On October 29, 2019, in connection with the pay off of the Senior Term Loan, we terminated approximately $75.7 million of this interest rate swap which required a settlement payment of approximately $0.6 million.
[10]	This variable rate loan bears interest at a rate of 1.95% plus Royal Bank of Canada Prime Rate, which was approximately 2.45% as of September 30, 2020, and in no event shall the total interest rate fall below 4.65% per annum. The Stoney Creek loan was assumed in the SSGT Mergers and had a balance of approximately $5 million USD as of the SSGT Mergers date. The Stoney Creek loan is secured by a first lien deed of trust on the Stoney Creek property and all improvements thereto, is cross-collateralized with the Torbarrie property, and is guaranteed by the Company. The amounts shown above are in USD based on the foreign exchange rate in effect as of September 30, 2020.
[11]	This variable rate loan bears interest at a rate of 1.95% plus Royal Bank of Canada Prime Rate, which was approximately 3.95% as of December 31, 2019, and in no event shall the total interest rate fall below 4.65% per annum. The Stoney Creek loan was assumed in the SSGT Mergers and had a balance of approximately $5 million USD as of the SSGT Mergers date. The Stoney Creek loan is secured by a first lien deed of trust on the Stoney Creek property and all improvements thereto, is cross-collateralized with the Torbarrie property, and is guaranteed by the Company. The amount shown above is in USD based on the foreign exchange rate in effect as of December 31, 2019.
[12]	This variable rate loan bears interest at a rate of 1.95% plus Royal Bank of Canada Prime Rate, which was approximately 2.45% as of September 30, 2020, and in no event shall the total interest rate fall below 4.65% per annum. The Torbarrie loan was assumed in the SSGT Mergers and had no outstanding balance as of the date of the SSGT Mergers. The Torbarrie loan is a construction loan and is secured by a first lien deed of trust on the Torbarrie property and all improvements thereto, is cross-collateralized with the Stoney Creek property, and is guaranteed by the Company. The amounts shown above are in USD based on the foreign exchange rate in effect as of September 30, 2020.
[13]	This variable rate loan bears interest at a rate of 1.95% plus Royal Bank of Canada Prime Rate, which was approximately 3.95% as of December 31, 2019, and in no event shall the total interest rate fall below 4.65% per annum. The Torbarrie loan was assumed in the SSGT Mergers and had no outstanding balance as of the date of the SSGT Mergers. The Torbarrie loan is a construction loan, which allows for borrowings up to approximately $10.3 million CAD and is secured by a first lien deed of trust on the Torbarrie property and all improvements thereto, is cross-collateralized with the Stoney Creek property, and is guaranteed by the Company. The amount shown above is in USD based on the foreign exchange rate in effect as of December 31, 2019.
[14]	Fixed rate debt with principal and interest payments due monthly. This promissory note was encumbered by five properties, Morrisville, Cary, Raleigh, Myrtle Beach I, and Myrtle Beach II. This loan was repaid in conjunction with the SSGT Merger financing.
[15]	This loan was assumed during the acquisition of the Oakland and Concord properties, along with an interest rate swap with USAmeriBank that fixed the interest rate at 3.95%. This loan was repaid in conjunction with the SSGT Merger financing.
[16]	This fixed rate loan encumbers 29 properties (Whittier, La Verne, Santa Ana, Upland, La Habra, Monterey Park, Huntington Beach, Chico, Lancaster I, Riverside, Fairfield, Lompoc, Santa Rosa, Federal Heights, Aurora, Littleton, Bloomingdale, Crestwood, Forestville, Warren I, Sterling Heights, Troy, Warren II, Beverly, Everett, Foley, Tampa, Boynton Beach, and Lancaster II) with monthly interest only payments until September 2021, at which time both interest and principal payments will be due monthly. The separate assets of these encumbered properties are not available to pay our other debts.
[17]	This fixed rate loan encumbers five properties (Pompano Beach, Lake Worth, Jupiter, Royal Palm Beach, and Delray) with monthly interest only payments until June 2022, at which time both interest and principal payments will be due monthly. The separate assets of these encumbered properties are not available to pay our other debts.
[18]	This fixed rate loan encumbers 11 self storage properties (Asheville I, Arden, Asheville II, Hendersonville I, Asheville III, Asheville IV, Asheville V, Asheville VI, Asheville VII, Asheville VIII, and Hendersonville II) with monthly interest only payments until September 2019, at which time both interest and principal payments became due monthly.
[19]	This fixed rate loan encumbers 10 properties (Myrtle Beach I, Myrtle Beach II, Port St. Lucie, Plantation, Sonoma, Las Vegas I, Las Vegas II, Las Vegas III, Ft Pierce, Nantucket Island). The separate assets of these encumbered properties are not available to pay our other debts.
[20]	This fixed rate loan encumbers 10 properties (Myrtle Beach I, Myrtle Beach II, Port St. Lucie, Plantation, Sonoma, Las Vegas I, Las Vegas II, Las Vegas III, Ft Pierce, Nantucket Island).

Schedule of Summarized Real E_2

Schedule of Summarized Real Estate Secured Debt (Parenthetical) (Detail) $ in Millions

Aug. 03, 2020USD ($)

Oct. 29, 2019USD ($)

Jan. 24, 2019USD ($)

Sep. 30, 2020USD ($)Property

Dec. 31, 2019USD ($)Property

Dec. 31, 2018USD ($)Property

Jan. 31, 2020USD ($)Property

Jul. 08, 2019CAD ($)

Jan. 29, 2019USD ($)

Jan. 25, 2019CAD ($)

Oct. 11, 2018CAD ($)

Oct. 01, 2018USD ($)

Mar. 28, 2018CAD ($)

Feb. 18, 2016USD ($)

Dec. 22, 2015USD ($)

Debt Instrument [Line Items]

Debt instrument maturity date

Jan. 24, 2022

Number of properties encumbered | Property

10

Fixed interest rate

1.79%

Derivative, notional amount

$ 95

$ 161,200,000

$ 90

$ 112

$ 101

Debt instrument, variable interest rate

1.95%

1.95%

Debt Instrument, Interest Rate

2.45%

3.95%

Debt Instrument Fixed Rate

5.00%

4.65%

4.65%

Debt Instrument Carrying Amount

$ 717,069,469

$ 719,769,887

Maximum borrowings under credit facility

$ 112

$ 105,000,000

Strategic Storage Growth Trust, Inc

Debt Instrument [Line Items]

Debt Instrument Carrying Amount

$ 19,000,000

Royal Bank of Canada Prime Rate

Debt Instrument [Line Items]

Debt Instrument, Interest Rate

2.45%

Interest Rate Swaps

Debt Instrument [Line Items]

Derivative, notional amount

$ 161,000,000

Interest Rate Caps

Debt Instrument [Line Items]

Debt instrument maturity date

Aug. 2, 2021

Effective interest rate cap on derivative instrument

0.50%

Derivative, notional amount

$ 80,000,000

Interest Rate Caps | LIBOR

Debt Instrument [Line Items]

Effective interest rate cap on derivative instrument

0.50%

Amended KeyBank Credit Facility

Debt Instrument [Line Items]

Number of properties encumbered | Property

21

Debt Instrument, Interest Rate

5.00%

Debt Instrument Carrying Amount

[1]

$ 0

$ 98,782,500

Maximum borrowings under credit facility

$ 145,000,000

Oakland and Concord Loan | Interest Rate Swaps

Debt Instrument [Line Items]

Interest rate, maturity date

Apr. 10, 2023

Derivative, notional amount

[2]

$ 19,483,127

$11M KeyBank Subordinate Loan

Debt Instrument [Line Items]

Number of properties encumbered | Property

34

Percentage of real estate property encumbered variable rate loan

49.00%

Debt Instrument, Interest Rate

6.25%

Debt Instrument Carrying Amount

[3]

$ 0

11,000,000

KeyBank CMBS Loan

Debt Instrument [Line Items]

Debt instrument maturity date

Feb. 1, 2029

Feb. 1, 2029

Debt Instrument Fixed Rate

5.00%

Debt Instrument Carrying Amount

$ 104,000,000

Canadian Citi Bank Loan

Debt Instrument [Line Items]

Number of properties encumbered | Property

10

Canadian Citi Bank Loan | Interest Rate Caps

Debt Instrument [Line Items]

Effective interest rate cap on derivative instrument

3.00%

3.00%

CMBS SASB Loan

Debt Instrument [Line Items]

Debt instrument maturity date

Feb. 9, 2022

[4]

Feb. 9, 2022

[5]

Number of properties encumbered | Property

29

29

Debt Instrument, Interest Rate

3.15%

4.76%

Debt Instrument Carrying Amount

$ 235,000,000

[4]

$ 235,000,000

[5]

0

[5]

CMBS SASB Loan | LIBOR

Debt Instrument [Line Items]

Debt instrument, description of variable rate basis

LIBOR plus 3%

Debt instrument, variable interest rate

3.00%

CMBS SASB Loan | Interest Rate Swaps

Debt Instrument [Line Items]

Debt Instrument, Interest Rate

4.79%

CMBS SASB Loan | Interest Rate Swaps | LIBOR

Debt Instrument [Line Items]

Fixed interest rate

1.79%

Interest rate, maturity date

Feb. 15, 2022

CMBS Loan | Interest Rate Swaps | LIBOR

Debt Instrument [Line Items]

Interest rate, maturity date

Feb. 15, 2022

Secured Loan

Debt Instrument [Line Items]

Debt instrument maturity date

[7]

Jan. 24, 2022

[6]

Jan. 24, 2022

[8]

Number of properties encumbered | Property

16

16

Debt Instrument, Interest Rate

3.00%

[6],[7]

4.26%

Debt Instrument Carrying Amount

[7]

$ 85,512,000

[6]

$ 85,512,000

[8]

0

[8]

Secured Loan | Interest Rate Swaps

Debt Instrument [Line Items]

Derivative, Fixed Interest Rate

5.10%

Derivative, notional amount

$ 75,700,000

Secured Loan | Interest Rate Caps | LIBOR

Debt Instrument [Line Items]

Effective interest rate cap on derivative instrument

2.60%

Stoney Creek Loan

Debt Instrument [Line Items]

Debt instrument maturity date

Oct. 1, 2021

[9]

Oct. 1, 2021

[10]

Debt Instrument, Interest Rate

4.65%

[9]

5.90%

Debt Instrument Carrying Amount

$ 5,446,364

[9]

$ 5,591,950

[10]

0

[10]

Stoney Creek Loan | Strategic Storage Growth Trust, Inc

Debt Instrument [Line Items]

Debt instrument, variable interest rate

1.95%

Debt Instrument Carrying Amount

$ 5,000,000

Stoney Creek Loan | Strategic Storage Growth Trust, Inc | Minimum

Debt Instrument [Line Items]

Debt Instrument Fixed Rate

4.65%

Torbarrie Loan

Debt Instrument [Line Items]

Debt instrument maturity date

Sep. 1, 2021

[11]

Sep. 1, 2021

[12]

Debt Instrument, Interest Rate

4.65%

[11]

5.90%

Debt Instrument Carrying Amount

$ 6,125,060

[11]

$ 5,936,996

[12]

0

[12]

Torbarrie Loan | Strategic Storage Growth Trust, Inc

Debt Instrument [Line Items]

Debt Instrument Carrying Amount

0

$ 0

Maximum borrowings under credit facility

$ 10,300,000

Fixed Rate Secured Debt

Debt Instrument [Line Items]

Debt instrument maturity date

Jan. 24, 2022

Fixed Rate Secured Debt | Interest Rate Swaps | Termination

Debt Instrument [Line Items]

Derivative, notional amount

85,500,000

Settlement payment of interest rate swaps

$ 600,000

Fixed Rate Secured Debt | Raleigh Myrtle Beach Promissory Note

Debt Instrument [Line Items]

Number of properties encumbered | Property

5

Debt Instrument Fixed Rate

5.73%

Debt Instrument Carrying Amount

[13]

$ 0

11,878,396

Fixed Rate Secured Debt | Oakland and Concord Loan

Debt Instrument [Line Items]

Debt Instrument Fixed Rate

3.95%

Debt Instrument Carrying Amount

[14]

$ 0

19,483,127

Fixed Rate Secured Debt | Oakland and Concord Loan | Interest Rate Swaps

Debt Instrument [Line Items]

Fixed interest rate

3.95%

Fixed Rate Secured Debt | KeyBank CMBS Loan

Debt Instrument [Line Items]

Debt instrument maturity date

Aug. 1, 2026

Aug. 1, 2026

[15]

Number of properties encumbered | Property

29

29

29

Debt Instrument Fixed Rate

3.89%

3.89%

Debt Instrument Carrying Amount

[15]

$ 95,000,000

$ 95,000,000

95,000,000

Fixed Rate Secured Debt | KeyBank Florida CMBS Loan

Debt Instrument [Line Items]

Debt instrument maturity date

May 1, 2027

May 1, 2027

[16]

Number of properties encumbered | Property

5

Debt Instrument Fixed Rate

4.65%

4.65%

Debt Instrument Carrying Amount

[16]

$ 52,000,000

$ 52,000,000

52,000,000

Fixed Rate Secured Debt | KeyBank Property Loan

Debt Instrument [Line Items]

Number of properties encumbered | Property

5

5

Fixed Rate Secured Debt | Midland North Carolina CMBS Loan

Debt Instrument [Line Items]

Debt instrument maturity date

Aug. 1, 2024

Aug. 1, 2024

[17]

Number of properties encumbered | Property

11

11

Debt Instrument Fixed Rate

5.31%

5.31%

Debt Instrument Carrying Amount

[17]

$ 46,591,442

$ 47,048,287

47,249,999

Fixed Rate Secured Debt | CMBS Loan

Debt Instrument [Line Items]

Debt instrument maturity date

Feb. 1, 2029

[18]

Feb. 1, 2029

[19]

Number of properties encumbered | Property

10

10

Debt Instrument Fixed Rate

5.00%

[18]

5.00%

Debt Instrument Carrying Amount

$ 104,000,000

[18]

$ 104,000,000

[19]

$ 0

[19]

[1]

As of December 31, 2018, this facility encumbered 21 properties (Xenia, Sidney, Troy, Greenville, Washington Court House, Richmond, Connersville, Vallejo, Port St. Lucie I, Sacramento, Sonoma, Las Vegas I, Las Vegas II, Las Vegas III, Baltimore, Aurora II, Plantation, Wellington, Naples, Port St. Lucie II, and Doral). This loan was repaid in conjunction with the SSGT Merger financing.

[2]

The Oakland and Concord loan interest rate swap was settled on January 24, 2019 in conjunction with the SSGT Mergers.

[3]

This variable rate loan encumbered 49% of the equity interest in the entities that own the 34 properties (the 29 properties encumbered by the KeyBank CMBS Loan and the five properties encumbered by the KeyBank Florida CMBS Loan), and was subordinate to the existing KeyBank CMBS Loan and KeyBank Florida CMBS Loan. This loan was repaid in conjunction with the SSGT Merger financing.

[4]

This variable rate loan encumbers 29 properties (Morrisville, Cary, Raleigh, Vallejo, Xenia, Sidney, Troy, Greenville, Washington Court House, Richmond, Connersville, Port St Lucie, Sacramento, Concord, Oakland, Wellington, Doral, Naples, Baltimore, Aurora, Jones Blvd - Las Vegas, Russell Rd - Las Vegas, Riverside, Stockton, Azusa, Romeoville, Elgin, San Antonio, Kingwood). The separate assets of these encumbered properties are not available to pay our other debts.

[5]

This variable rate loan encumbers our 29 properties (Morrisville, Cary, Raleigh, Vallejo, Xenia, Sidney, Troy, Greenville, Washington Court House, Richmond, Connersville, Port St Lucie, Sacramento, Concord, Oakland, Wellington, Doral, Naples, Baltimore, Aurora, Jones Blvd - Las Vegas, Russell Rd - Las Vegas, Riverside, Stockton, Azusa, Romeoville, Elgin, San Antonio, Kingwood). In June 2019, we purchased an interest rate swap whereby LIBOR is fixed at 1.79% though February 15, 2022. The separate assets of these encumbered properties are not available to pay our other debts.

[6]

On January 29, 2019, we entered into a $161.2 million notional interest rate swap whereby LIBOR was fixed at approximately 2.6% until August 1, 2020. On October 29, 2019, in connection with the pay off of the Senior Term Loan, we terminated approximately $75.7 million of this interest rate swap which required a settlement payment of approximately $0.6 million. The remaining $85.5 million of the interest rate swap effectively fixed the interest rate on the Secured Loan at 5.1% until August 1, 2020. To continue hedging our interest rate risk related to this loan, we purchased an interest rate cap on August 3, 2020 with a notional amount of $80 million that effectively caps LIBOR at 0.5% through August 2, 2021.

[7]

This variable rate loan encumbers 16 properties (Colorado Springs, Aurora, Phoenix, 3173 Sweeten Creek Rd - Asheville, Elk Grove, Garden Grove, Deaverview Rd - Asheville, Highland Center Blvd - Asheville, Sarasota, Mount Pleasant, Pembroke Pines, Riverview, Eastlake, McKinney, Hualapai Way - Las Vegas, Gilbert). The separate assets of these encumbered properties are not available to pay our other debts.

[8]

On January 29, 2019, we entered into a $161.2 million notional interest rate swap whereby LIBOR was fixed at approximately 2.6% until August 1, 2020. On October 29, 2019, in connection with the pay off of the Senior Term Loan, we terminated approximately $75.7 million of this interest rate swap which required a settlement payment of approximately $0.6 million.

[9]

This variable rate loan bears interest at a rate of 1.95% plus Royal Bank of Canada Prime Rate, which was approximately 2.45% as of September 30, 2020, and in no event shall the total interest rate fall below 4.65% per annum. The Stoney Creek loan was assumed in the SSGT Mergers and had a balance of approximately $5 million USD as of the SSGT Mergers date. The Stoney Creek loan is secured by a first lien deed of trust on the Stoney Creek property and all improvements thereto, is cross-collateralized with the Torbarrie property, and is guaranteed by the Company. The amounts shown above are in USD based on the foreign exchange rate in effect as of September 30, 2020.

[10]

This variable rate loan bears interest at a rate of 1.95% plus Royal Bank of Canada Prime Rate, which was approximately 3.95% as of December 31, 2019, and in no event shall the total interest rate fall below 4.65% per annum. The Stoney Creek loan was assumed in the SSGT Mergers and had a balance of approximately $5 million USD as of the SSGT Mergers date. The Stoney Creek loan is secured by a first lien deed of trust on the Stoney Creek property and all improvements thereto, is cross-collateralized with the Torbarrie property, and is guaranteed by the Company. The amount shown above is in USD based on the foreign exchange rate in effect as of December 31, 2019.

[11]

This variable rate loan bears interest at a rate of 1.95% plus Royal Bank of Canada Prime Rate, which was approximately 2.45% as of September 30, 2020, and in no event shall the total interest rate fall below 4.65% per annum. The Torbarrie loan was assumed in the SSGT Mergers and had no outstanding balance as of the date of the SSGT Mergers. The Torbarrie loan is a construction loan and is secured by a first lien deed of trust on the Torbarrie property and all improvements thereto, is cross-collateralized with the Stoney Creek property, and is guaranteed by the Company. The amounts shown above are in USD based on the foreign exchange rate in effect as of September 30, 2020.

[12]

This variable rate loan bears interest at a rate of 1.95% plus Royal Bank of Canada Prime Rate, which was approximately 3.95% as of December 31, 2019, and in no event shall the total interest rate fall below 4.65% per annum. The Torbarrie loan was assumed in the SSGT Mergers and had no outstanding balance as of the date of the SSGT Mergers. The Torbarrie loan is a construction loan, which allows for borrowings up to approximately $10.3 million CAD and is secured by a first lien deed of trust on the Torbarrie property and all improvements thereto, is cross-collateralized with the Stoney Creek property, and is guaranteed by the Company. The amount shown above is in USD based on the foreign exchange rate in effect as of December 31, 2019.

[13]

Fixed rate debt with principal and interest payments due monthly. This promissory note was encumbered by five properties, Morrisville, Cary, Raleigh, Myrtle Beach I, and Myrtle Beach II. This loan was repaid in conjunction with the SSGT Merger financing.

[14]

This loan was assumed during the acquisition of the Oakland and Concord properties, along with an interest rate swap with USAmeriBank that fixed the interest rate at 3.95%. This loan was repaid in conjunction with the SSGT Merger financing.

[15]

This fixed rate loan encumbers 29 properties (Whittier, La Verne, Santa Ana, Upland, La Habra, Monterey Park, Huntington Beach, Chico, Lancaster I, Riverside, Fairfield, Lompoc, Santa Rosa, Federal Heights, Aurora, Littleton, Bloomingdale, Crestwood, Forestville, Warren I, Sterling Heights, Troy, Warren II, Beverly, Everett, Foley, Tampa, Boynton Beach, and Lancaster II) with monthly interest only payments until September 2021, at which time both interest and principal payments will be due monthly. The separate assets of these encumbered properties are not available to pay our other debts.

[16]

This fixed rate loan encumbers five properties (Pompano Beach, Lake Worth, Jupiter, Royal Palm Beach, and Delray) with monthly interest only payments until June 2022, at which time both interest and principal payments will be due monthly. The separate assets of these encumbered properties are not available to pay our other debts.

[17]

This fixed rate loan encumbers 11 self storage properties (Asheville I, Arden, Asheville II, Hendersonville I, Asheville III, Asheville IV, Asheville V, Asheville VI, Asheville VII, Asheville VIII, and Hendersonville II) with monthly interest only payments until September 2019, at which time both interest and principal payments became due monthly.

[18]

This fixed rate loan encumbers 10 properties (Myrtle Beach I, Myrtle Beach II, Port St. Lucie, Plantation, Sonoma, Las Vegas I, Las Vegas II, Las Vegas III, Ft Pierce, Nantucket Island). The separate assets of these encumbered properties are not available to pay our other debts.

[19]

This fixed rate loan encumbers 10 properties (Myrtle Beach I, Myrtle Beach II, Port St. Lucie, Plantation, Sonoma, Las Vegas I, Las Vegas II, Las Vegas III, Ft Pierce, Nantucket Island).

Debt - Additional Information (

Debt - Additional Information (Detail) $ in Millions		Aug. 03, 2020USD ($)	Oct. 29, 2019USD ($)	Oct. 18, 2019USD ($)	Jun. 07, 2019USD ($)	Jan. 24, 2019USD ($)PropertyExtension	Jan. 24, 2019USD ($)PropertyExtension	Oct. 11, 2018CAD ($)Extension	Oct. 11, 2018CAD ($)	Sep. 30, 2020USD ($)Property	Sep. 30, 2019USD ($)	Sep. 30, 2020USD ($)Property	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)PropertyExtension		Dec. 31, 2018USD ($)Property	Dec. 31, 2017USD ($)	May 08, 2020USD ($)	Jan. 31, 2020Property	Dec. 31, 2019CAD ($)Property	Aug. 30, 2019USD ($)	Jul. 11, 2019USD ($)	Jul. 08, 2019CAD ($)	Jan. 29, 2019USD ($)	Jan. 25, 2019CAD ($)	Oct. 29, 2018USD ($)	Oct. 11, 2018USD ($)PropertySpecialPurposeEntity	Oct. 11, 2018CAD ($)PropertySpecialPurposeEntity	Oct. 01, 2018USD ($)	Mar. 28, 2018CAD ($)	Feb. 18, 2016USD ($)	Dec. 22, 2015USD ($)
Debt Instrument [Line Items]
Debt Instrument, Interest Rate										2.45%		2.45%		3.95%						3.95%
Weighted average interest rate on debt										3.73%		3.73%		4.60%						4.60%
Loss on extinguishment of debt										$ 0	$ 0	$ 0	$ (1,487,867)	$ (2,647,633)		$ 0	$ 0
Debt Instrument Carrying Amount										$ 717,069,469		$ 717,069,469		$ 719,769,887
Number of wholly owned properties | Property						16	16
Number of special purpose entities | SpecialPurposeEntity																											10	10
Debt Instrument Maturity Date												Jan. 24, 2022
Line of credit facility, number of extension options | Extension						2	2
Line of credit facility, term of extension options						1 year	1 year
Debt instrument, basis spread on variable rate						4.25%	4.25%
Derivative, notional amount																							$ 95	$ 161,200,000	$ 90			$ 112		$ 101
Debt instrument, interest rate						5.00%	5.00%			4.65%		4.65%		4.65%						4.65%
Debt instrument face amount						$ 500,178,000	$ 500,178,000
Outstanding balance on credit facility										$ 85,500,000		$ 85,500,000
Repayments of debt													$ 141,088,724	$ 251,732,077		72,513,082	$ 130,671,050
Number of properties encumbered | Property														10						10
Maximum borrowings under credit facility																												$ 112				$ 105,000,000
Fixed Rate Secured Debt
Debt Instrument [Line Items]
Number of wholly owned properties | Property						16	16
Debt Instrument Maturity Date														Jan. 24, 2022
Line of credit facility, number of extension options | Extension						1	1
Debt instrument face amount						$ 89,200,000	$ 89,200,000
Maximum | Secured Loan Amendment
Debt Instrument [Line Items]
Amendment to secured loan with secured lenders																		$ 15,000,000
Minimum | Secured Loan Amendment
Debt Instrument [Line Items]
Amendment to secured loan with secured lenders																		$ 10,000,000
Senior Term Loan
Debt Instrument [Line Items]
Debt instrument, description of variable rate basis														LIBOR plus 4.25%
Derivative, notional amount						$ 72,000,000	$ 72,000,000
Debt instrument, interest rate						2.60%	2.60%
Debt instrument face amount						$ 72,000,000	$ 72,000,000
Percentage Of Equity Interest Securing Loan							49.00%
Line of credit facility, Additional borrowing capacity						$ 15,700,000	$ 15,700,000							$ 14,300,000
Fixed Rate Secured Debt
Debt Instrument [Line Items]
Line of credit facility, term of extension options						1 year	1 year
Debt instrument, description of variable rate basis												LIBOR plus 2.5%		LIBOR plus 2.5%
Debt instrument, basis spread on variable rate						2.50%	2.50%
Derivative, notional amount						$ 89,200,000	$ 89,200,000
Debt instrument, interest rate						2.60%	2.60%
Debt instrument face amount						$ 89,200,000	$ 89,200,000
Amended KeyBank Credit Facility
Debt Instrument [Line Items]
Debt Instrument, Interest Rate														5.00%						5.00%
Debt Instrument Carrying Amount	[1]													$ 0		$ 98,782,500
Line of credit facility, number of extension options | Extension														2
Line of credit facility, term of extension options														1 year
Debt instrument face amount														$ 110,000,000
Number of properties encumbered | Property																21
Maximum borrowings under credit facility																															$ 145,000,000
Line of credit facility, description														The Amended KeyBank Credit Facility was a revolving loan with an initial term of three years, maturing on December 22, 2018, with two one-year extension options subject to certain conditions outlined further in the credit agreement for the Amended KeyBank Credit Facility (the “Amended Credit Agreement”). On October 29, 2018, we amended our Amended KeyBank Credit Facility to extend the maturity date until February 20, 2019 and reduce the maximum borrowing capacity from $145 million to $110 million. Payments due pursuant to the Amended KeyBank Credit Facility were interest-only. As of December 31, 2018, we had approximately $98.8 million in borrowings outstanding under the Amended KeyBank Credit Facility. On January 24, 2019, we paid off and terminated the Amended KeyBank Credit Facility in conjunction with the SSGT Mergers.
Line of credit facility, maturity date			Feb. 20, 2019											Dec. 22, 2018
Additional borrowing capacity																															$ 40,000,000
Line of credit facility, initial term														3 years
Line Of Credit Facility Potential Additional Borrowing Capacity																										$ 145,000,000
Amended KeyBank Credit Facility | Fixed Rate Secured Debt
Debt Instrument [Line Items]
Outstanding balance on credit facility														$ 98,800,000
LIBOR | Minimum | Secured Loan Amendment
Debt Instrument [Line Items]
Debt Instrument, Interest Rate																		0.50%
Interest Rate Caps
Debt Instrument [Line Items]
Debt Instrument Maturity Date		Aug. 2, 2021
Derivative, notional amount		$ 80,000,000
Debt instrument, interest rate		0.50%
Interest Rate Caps | LIBOR
Debt Instrument [Line Items]
Debt instrument, interest rate		0.50%
Interest Rate Swaps
Debt Instrument [Line Items]
Derivative, notional amount						161,000,000	161,000,000
Interest Rate Swaps | Termination | Fixed Rate Secured Debt
Debt Instrument [Line Items]
Derivative, notional amount			$ 85,500,000
Interest Rate Swaps | Fixed Rate Secured Debt | Termination
Debt Instrument [Line Items]
Derivative, notional amount			$ 85,500,000
KeyBank and Citi Real Estate Funding
Debt Instrument [Line Items]
Debt Instrument Carrying Amount						235,000,000	235,000,000
CMBS SASB Mortgage Loan
Debt Instrument [Line Items]
Debt Instrument Carrying Amount						$ 180,000,000	$ 180,000,000
Number of wholly owned properties | Property						29	29
Number of special purpose entities | Property						29	29
Debt Instrument Maturity Date												Feb. 9, 2022
Derivative, notional amount						$ 180,000,000	$ 180,000,000
Derivative, inception date							Jan. 24, 2019					Jan. 24, 2019
CMBS SASB Mortgage Loan | Interest Rate Caps
Debt Instrument [Line Items]
Derivative, notional amount					$ 180,000,000
CMBS SASB Mezzanine Loan
Debt Instrument [Line Items]
Debt Instrument Carrying Amount						$ 55,000,000	$ 55,000,000
Number of special purpose entities | Property						29	29
Debt Instrument Maturity Date							Feb. 9, 2022
Derivative, notional amount						$ 55,000,000	$ 55,000,000
Derivative, inception date							Jan. 24, 2019					Jan. 24, 2019
CMBS SASB Mezzanine Loan | Interest Rate Caps
Debt Instrument [Line Items]
Derivative, notional amount					$ 55,000,000
CMBS SASB Loan
Debt Instrument [Line Items]
Debt instrument, description of variable rate basis							(a) the borrower with respect to the CMBS SASB Mortgage Loan has purchased an interest rate cap with a notional amount of $180 million, with an effective date of January 24, 2019, whereby LIBOR is capped at 3% through February 15, 2022 and (b) the borrower with respect to the CMBS SASB Mezzanine Loan has purchased an interest rate cap with a notional amount of $55 million, with an effective date of January 24, 2019, whereby LIBOR is capped at 3% through February 15, 2022. On June 7, 2019, to effectively terminate our $180 million and $55 million existing interest rate caps, we sold an offsetting interest rate cap with a notional amount of $235 million, whereby LIBOR is capped at 3% through February 15, 2022. We simultaneously entered into an interest rate swap with a notional amount of $235 million, whereby LIBOR is fixed at 1.79% through February 15, 2022. None of the CMBS SASB Loan may be prepaid, in whole or in part, without satisfying certain conditions as set forth in the respective CMBS SASB Loan Agreements, such as the payment of a spread maintenance premium if the prepayment is made within the first two years. Thereafter the CMBS SASB Loan may be prepaid in whole or in part at par without penalty.
Debt instrument, description												(a) the borrower with respect to the CMBS SASB Mortgage Loan has purchased an interest rate cap with a notional amount of $180 million, with an effective date of January 24, 2019, whereby LIBOR is capped at 3% through February 15, 2022 and (b) the borrower with respect to the CMBS SASB Mezzanine Loan has purchased an interest rate cap with a notional amount of $55 million, with an effective date of January 24, 2019, whereby LIBOR is capped at 3% through February 15, 2022. On June 7, 2019, to effectively terminate our $180 million and $55 million existing interest rate caps, we sold an offsetting interest rate cap with a notional amount of $235 million, whereby LIBOR is capped at 3% through February 15, 2022. We simultaneously entered into an interest rate swap with a notional amount of $235 million, whereby LIBOR is fixed at 1.79% through February 15, 2022. None of the CMBS SASB Loan may be prepaid, in whole or in part, without satisfying certain conditions as set forth in the respective CMBS SASB Loan Agreements, such as the payment of a spread maintenance premium if the prepayment is made within the first two years. Thereafter the CMBS SASB Loan may be prepaid in whole or in part at par without penalty
Debt instrument face amount						$ 235,000,000	$ 235,000,000
CMBS SASB Loan | LIBOR
Debt Instrument [Line Items]
Debt Instrument Maturity Date					Feb. 15, 2022
Debt instrument, description of variable rate basis						LIBOR plus 3%	LIBOR plus 3%
Debt instrument, basis spread on variable rate						3.00%	3.00%
CMBS SASB Loan | Interest Rate Caps
Debt Instrument [Line Items]
Derivative, notional amount					$ 235,000,000
Debt instrument, interest rate					3.00%
CMBS SASB Loan | Interest Rate Swaps
Debt Instrument [Line Items]
Debt Instrument Maturity Date					Feb. 15, 2022
Derivative, notional amount					$ 235,000,000
Debt instrument, interest rate					1.79%
KeyBank CMBS Loan
Debt Instrument [Line Items]
Debt Instrument Carrying Amount						$ 104,000,000	$ 104,000,000
Number of wholly owned properties | Property						10	10
Debt Instrument Maturity Date							Feb. 1, 2029					Feb. 1, 2029
Debt instrument, interest rate						5.00%	5.00%
Minimum Number of Years to Defease the Loan						2 years	2 years
KeyBank CMBS Loan | Fixed Rate Secured Debt
Debt Instrument [Line Items]
Debt Instrument Carrying Amount	[2]									$ 95,000,000		$ 95,000,000		$ 95,000,000		$ 95,000,000
Debt Instrument Maturity Date												Aug. 1, 2026		Aug. 1, 2026	[2]
Debt instrument, interest rate										3.89%		3.89%		3.89%						3.89%
Number of properties encumbered | Property										29		29		29					29	29
KeyBank and SunTrust Bank
Debt Instrument [Line Items]
Debt Instrument Carrying Amount						$ 96,400,000	$ 96,400,000
KeyBank and SunTrust Bank Operating Partnership
Debt Instrument [Line Items]
Debt Instrument Carrying Amount						87,700,000	87,700,000
Canadian CitiBank | Canadian Debt Refinancing
Debt Instrument [Line Items]
Line of credit facility extended expiration date												Oct. 9, 2021
Number of special purpose entities | SpecialPurposeEntity																											10	10
Line of credit facility, number of extension options | Extension								3						3
Line of credit facility, term of extension options								1 year
Derivative, notional amount																				$ 111.3							$ 112,000,000	$ 111.3
Debt instrument, interest rate																											3.00%	3.00%
Debt instrument, interest rate																											0.25%	0.25%
Number of properties encumbered | Property																											10	10
Maximum borrowings under credit facility																												$ 112
Proceeds from line of credit								$ 99.3	$ 99.3
Line of credit facility, description												The CitiBank Loan Agreement is a term loan, the original maturity date was October 9, 2020. The loan may, in certain circumstances, be extended at our option for three consecutive terms of one year each. We exercised the first one year extension option, extending the maturity date to October 9, 2021. Monthly payments due under the CitiBank Loan Agreement are interest-only, with the full principal amount becoming due and payable on the maturity date.		The CitiBank Loan Agreement is a term loan that matures on October 9, 2020, which may, in certain circumstances, be extended at our option for three consecutive terms of one year each. Monthly payments due under the CitiBank Loan Agreement are interest-only, with the full principal amount becoming due and payable on the maturity date.
Line of credit facility, maturity date								Oct. 9, 2020
Line of credit, interest rate description												The amounts outstanding under the CitiBank Loan Agreement bear interest at a rate equal to the sum of the “CDOR” (as defined in the CitiBank Loan Agreement) and 2.25%.		The amounts outstanding under the CitiBank Loan Agreement bear interest at a rate equal to the sum of the “CDOR” (as defined in the CitiBank Loan Agreement) and 2.25%.
Canadian CitiBank | Canadian Debt Refinancing | Maximum
Debt Instrument [Line Items]
Line of credit facility, Additional borrowing capacity																				$ 0.7								$ 0.7
Strategic Storage Growth Trust, Inc
Debt Instrument [Line Items]
Loss on extinguishment of debt						1,500,000	1,500,000
Debt Instrument Carrying Amount																													$ 19,000,000
Debt instrument face amount						$ 500,000,000	$ 500,000,000
Gilbert Property | Fixed Rate Secured Debt
Debt Instrument [Line Items]
Additional amount to draw																					$ 500,000	$ 5,700,000
Outstanding balance on credit facility																					$ 95,400,000
San Antonio II Property | Fixed Rate Secured Debt
Debt Instrument [Line Items]
Repayments of debt				$ 9,900,000
[1]	As of December 31, 2018, this facility encumbered 21 properties (Xenia, Sidney, Troy, Greenville, Washington Court House, Richmond, Connersville, Vallejo, Port St. Lucie I, Sacramento, Sonoma, Las Vegas I, Las Vegas II, Las Vegas III, Baltimore, Aurora II, Plantation, Wellington, Naples, Port St. Lucie II, and Doral). This loan was repaid in conjunction with the SSGT Merger financing.
[2]	This fixed rate loan encumbers 29 properties (Whittier, La Verne, Santa Ana, Upland, La Habra, Monterey Park, Huntington Beach, Chico, Lancaster I, Riverside, Fairfield, Lompoc, Santa Rosa, Federal Heights, Aurora, Littleton, Bloomingdale, Crestwood, Forestville, Warren I, Sterling Heights, Troy, Warren II, Beverly, Everett, Foley, Tampa, Boynton Beach, and Lancaster II) with monthly interest only payments until September 2021, at which time both interest and principal payments will be due monthly. The separate assets of these encumbered properties are not available to pay our other debts.

Debt - Summary of Merger Financ

Debt - Summary of Merger Financings (Detail)	Jan. 24, 2019USD ($)
Debt Instrument [Line Items]
Principal Borrowing as of Merger Date	$ 500,178,000
CMBS SASB Loan
Debt Instrument [Line Items]
Principal Borrowing as of Merger Date	235,000,000
CMBS Loan
Debt Instrument [Line Items]
Principal Borrowing as of Merger Date	104,000,000
Fixed Rate Secured Debt
Debt Instrument [Line Items]
Principal Borrowing as of Merger Date	89,178,000
Senior Term Loan
Debt Instrument [Line Items]
Principal Borrowing as of Merger Date	$ 72,000,000

Debt - Summary of Payment Relat

Debt - Summary of Payment Related to Merger Consideration and Repayment of Debt (Detail)	Jan. 24, 2019USD ($)
Debt Instrument [Line Items]
Principal Repaid	$ 141,088,724
Amended KeyBank Credit Facility
Debt Instrument [Line Items]
Principal Repaid	98,782,500
Raleigh Myrtle Beach Promissory Note
Debt Instrument [Line Items]
Principal Repaid	11,862,471
Oakland and Concord Loan
Debt Instrument [Line Items]
Principal Repaid	19,443,753
$11M KeyBank Subordinate Loan
Debt Instrument [Line Items]
Principal Repaid	$ 11,000,000

Debt - Summary of Payment Rel_2

Debt - Summary of Payment Related to Merger Consideration and Repayment of Debt (Paranthetical) (Detail) $ in Millions	Jan. 24, 2019USD ($)
KeyBank Subordinate Loan
Debt Instrument [Line Items]
Subordinate Loan	$ 11

Future Principal Payment Requir

Future Principal Payment Requirements on Outstanding Debt (Detail) - USD ($)	Sep. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Debt, Fiscal Year Maturity
2020	$ 184,142	$ 86,208,937
2021	96,140,324	12,823,585
2022	323,426,408	323,426,829
2023	3,384,134	3,384,578
2024	47,043,621	47,035,146
2025 and thereafter	246,890,840	246,890,812
Total payments	717,069,469	719,769,887
Premium on secured debt, net	494,168	592,505
Debt issuance costs, net	(4,774,227)	(7,629,390)	$ (36,907)
Total	$ 712,789,410	$ 712,733,002	$ 406,084,103

Preferred Equity - Additional I

Preferred Equity - Additional Information (Details)	Oct. 29, 2019USD ($)Dayy$ / sharesshares	Sep. 30, 2020USD ($)shares	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)shares	Oct. 26, 2020USD ($)	Dec. 31, 2018shares
Class Of Stock [Line Items]
Maximum purchase commitment amount	$ 200,000,000
Initial closing amount	150,000,000	$ 150,000,000
Additional purchase commitment amount	$ 50,000,000
Issuance costs		519,456	$ 509,512	$ 3,573,836
Authorized but unissued shares of preferred stock | shares				200,000,000
Preferred stock, dividend rate, percentage	6.25%
Fifth To Tenth Anniversary
Class Of Stock [Line Items]
Dividend rate percentage of increase on preferred stock	0.75%
Tenth Anniversary | Maximum
Class Of Stock [Line Items]
Preferred stock, dividend rate, percentage	9.00%
After Tenth Anniversary
Class Of Stock [Line Items]
Dividend rate percentage of increase on preferred stock	0.75%
Series A Convertible Preferred Stock Purchase Agreement
Class Of Stock [Line Items]
Amount of accumulated and unpaid fees on undrawn commitment		$ 100,000		$ 100,000
Maximum purchase commitment amount	$ 200,000,000
Initial closing amount	150,000,000			$ 150,000,000
Additional purchase commitment amount	$ 50,000,000
Rate of investor fee	0.25%
Issuance costs	$ 3,600,000
Preferred stock, dividend rate, percentage	6.25%
Preferred stock payment description		Upon any voluntary or involuntary liquidation, dissolution or winding up of the Company, the holders of Series A Convertible Preferred Stock will be entitled to receive a payment equal to the greater of (i) aggregate purchase price of all outstanding Preferred Shares, plus any accrued and unpaid dividends (the “Liquidation Amount”) and (ii) the amount that that would have been payable had the Preferred Shares been converted into common stock pursuant to the terms of the Purchase Agreement immediately prior to such liquidation.		Upon any voluntary or involuntary liquidation, dissolution or winding up of the Company, the holders of Series A Convertible Preferred Stock will be entitled to receive a payment equal to the greater of (i) aggregate purchase price of all outstanding Preferred Shares, plus any accrued and unpaid dividends (the “Liquidation Amount”) and (ii) the amount that that would have been payable had the Preferred Shares been converted into common stock pursuant to the terms of the Purchase Agreement immediately prior to such liquidation.
Preferred stock redemption description		Subject to certain additional redemption rights, as described herein, we have the right to redeem the Series A Convertible Preferred Stock for cash at any time following the fifth anniversary of the Initial Closing. The amount of such redemption will be equal to the Liquidation Amount. Upon the listing of our common stock on a national securities exchange (the “Listing”), we have the right to redeem any or all outstanding Series A Convertible Preferred Stock at an amount equal to the greater of (i) the amount that would have been payable had such Preferred Shares been converted into common stock pursuant to the terms of the Purchase Agreement immediately prior to the Listing, and then all of such Preferred Shares were sold in the Listing, or (ii) the Liquidation Amount, plus a premium amount (the “Premium Amount”) of 10%, 8%, 6%, 4%, or 2% if redeemed prior to the first, second, third, fourth, or fifth anniversary dates of issuance, respectively, or 0% if redeemed thereafter, as set forth in the Articles Supplementary. Upon a change of control event, we have the right to redeem any or all outstanding Series A Convertible Preferred Stock at an amount equal to the greater of (i) the amount that would have been payable had the Preferred Shares been converted into common stock pursuant to the terms of the Purchase Agreement immediately prior to such change of control or (ii) the Liquidation Amount, plus the Premium Amount, as set forth in the Articles Supplementary. In addition, subject to certain cure provisions, if we fail to maintain our status as a real estate investment trust, the holders of Series A Convertible Preferred Stock have the right to require us to repurchase the Series A Convertible Preferred Stock at an amount equal to the Liquidation Amount with no Premium Amount.		Subject to certain additional redemption rights, as described herein, we have the right to redeem the Series A Convertible Preferred Stock for cash at any time following the fifth anniversary of the Initial Closing. The amount of such redemption will be equal to the Liquidation Amount. Upon the listing of our common stock on a national securities exchange (the “Listing”), we have the right to redeem any or all outstanding Series A Convertible Preferred Stock at an amount equal to the greater of (i) the amount that would have been payable had such Preferred Shares been converted into common stock pursuant to the terms of the Purchase Agreement immediately prior to the Listing, and then all of such Preferred Shares were sold in the Listing, or (ii) the Liquidation Amount, plus a premium amount (the “Premium Amount”) of 10%, 8%, 6%, 4%, or 2% if redeemed prior to the first, second, third, fourth, or fifth anniversary dates of issuance, respectively, or 0% if redeemed thereafter, as set forth in the Articles Supplementary. Upon a change of control event, we have the right to redeem any or all outstanding Series A Convertible Preferred Stock at an amount equal to the greater of (i) the amount that would have been payable had the Preferred Shares been converted into common stock pursuant to the terms of the Purchase Agreement immediately prior to such change of control or (ii) the Liquidation Amount, plus the Premium Amount, as set forth in the Articles Supplementary. In addition, subject to certain cure provisions, if we fail to maintain our status as a real estate investment trust, the holders of Series A Convertible Preferred Stock have the right to require us to repurchase the Series A Convertible Preferred Stock at an amount equal to the Liquidation Amount with no Premium Amount.
Preferred stock redemption premium	$ 0	$ 0
Preferred stock, conversion basis		At any time after the earlier to occur of (i) the second anniversary of the Initial Closing or (ii) 180 days after a Listing, the holders of Series A Convertible Preferred Stock have the right to convert any or all of the Series A Convertible Preferred Stock held by such holders into common stock at a rate per share equal to the quotient obtained by dividing the Liquidation Amount by the conversion price. The conversion price is $10.66, as may be adjusted in connection with stock splits, stock dividends and other similar transactions.		At any time after the earlier to occur of (i) the second anniversary of the Initial Closing or (ii) 180 days after a Listing, the holders of Series A Convertible Preferred Stock have the right to convert any or all of the Series A Convertible Preferred Stock held by such holders into common stock at a rate per share equal to the quotient obtained by dividing the Liquidation Amount by the conversion price. The conversion price is $10.66, as may be adjusted in connection with stock splits, stock dividends and other similar transactions.
Conversion price per share | $ / shares	$ 10.66
Number of days after lifting of preferred stock to common stock | Dayy	180
Preferred stock, voting rights condition				This foregoing limited voting right shall cease when all past dividend periods have been paid in full. In addition, the affirmative vote of the holders of a majority of the outstanding shares of Series A Convertible Preferred Stock is required in certain customary circumstances, as well as other circumstances, such as (i) our real estate portfolio exceeding a leverage ratio of 60% loan-to-value, (ii) entering into certain transactions with our Executive Chairman as of the Commitment Date, or his affiliates, (iii) effecting a merger (or similar) transaction with an entity whose assets are not at least 80% self storage related and (iv) entering into any line of business other than self storage and ancillary businesses, unless such ancillary business represents revenues of less than 10% of our revenues for our last fiscal year.
Required leverage ratio of our real estate portfolio	60.00%
Required percentage of self storage related assets of merger entity	80.00%
Required ancillary business revenue to total revenue	10.00%
Preferred stock, investors rights agreement		In connection with the issuance of the Series A Convertible Preferred Stock, we and the Investor also entered into an investors’ rights agreement (the “Investors’ Rights Agreement”) which provides the Investor with certain customary protections, including demand registration rights and “piggyback” registration rights with respect to our common stock issued to the Investor upon conversion of the Preferred Shares.		In connection with the issuance of the Series A Convertible Preferred Stock, we and the Investor also entered into an investors’ rights agreement (the “Investors’ Rights Agreement”) which provides the Investor with certain customary protections, including demand registration rights and “piggyback” registration rights with respect to our common stock issued to the Investor upon conversion of the Preferred Shares.
Preferred shares outstanding | shares		150,000		150,000		0
Aggregate liquidation preference		$ 152,500,000		$ 151,700,000
Amount of accumulated and unpaid distributions		$ 2,300,000		$ 1,700,000
Preferred stock, shares issued | shares						0
Series A Convertible Preferred Stock Purchase Agreement | Series A Convertible Preferred Stock
Class Of Stock [Line Items]
Authorized but unissued shares of preferred stock | shares	200,000
Series A Convertible Preferred Stock Purchase Agreement | Fifth To Tenth Anniversary
Class Of Stock [Line Items]
Dividend rate percentage of increase on preferred stock	0.75%
Series A Convertible Preferred Stock Purchase Agreement | Tenth Anniversary
Class Of Stock [Line Items]
Preferred stock, dividend rate, percentage	9.00%
Series A Convertible Preferred Stock Purchase Agreement | Tenth Anniversary | Maximum
Class Of Stock [Line Items]
Preferred stock, dividend rate, percentage	9.00%
Series A Convertible Preferred Stock Purchase Agreement | After Tenth Anniversary
Class Of Stock [Line Items]
Dividend rate percentage of increase on preferred stock	0.75%
Series A Convertible Preferred Stock Purchase Agreement | First Anniversary
Class Of Stock [Line Items]
Premium amount over liquidation amount on redemption, percent	10.00%
Series A Convertible Preferred Stock Purchase Agreement | Second Anniversary
Class Of Stock [Line Items]
Premium amount over liquidation amount on redemption, percent	8.00%
Series A Convertible Preferred Stock Purchase Agreement | Third Anniversary
Class Of Stock [Line Items]
Premium amount over liquidation amount on redemption, percent	6.00%
Series A Convertible Preferred Stock Purchase Agreement | Fourth Anniversary
Class Of Stock [Line Items]
Premium amount over liquidation amount on redemption, percent	4.00%
Series A Convertible Preferred Stock Purchase Agreement | Fifth Anniversary
Class Of Stock [Line Items]
Premium amount over liquidation amount on redemption, percent	2.00%
Series A Convertible Preferred Stock Purchase Agreement | After Fifth Anniversary
Class Of Stock [Line Items]
Premium amount over liquidation amount on redemption, percent	0.00%
Subsequent Event
Class Of Stock [Line Items]
Second and final closing amount	$ 50,000,000				$ 50,000,000

Derivative Instruments - Additi

Derivative Instruments - Additional Information (Detail) $ in Millions	Feb. 10, 2020USD ($)	Oct. 29, 2019USD ($)	Jul. 08, 2019USD ($)	Jan. 25, 2019USD ($)	Jan. 25, 2019USD ($)	Mar. 28, 2018USD ($)	Sep. 30, 2020USD ($)	Jun. 30, 2020USD ($)	Mar. 31, 2020USD ($)	Sep. 30, 2019USD ($)	Jun. 30, 2019USD ($)	Mar. 31, 2019USD ($)	Sep. 30, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Feb. 10, 2020CAD ($)	Dec. 09, 2019CAD ($)	Jul. 08, 2019CAD ($)	Jan. 29, 2019USD ($)	Jan. 25, 2019CAD ($)	Jan. 24, 2019USD ($)	Oct. 11, 2018CAD ($)	Mar. 28, 2018CAD ($)
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Derivative, notional amount																			$ 95	$ 161,200,000	$ 90		$ 112	$ 101
Foreign currency forward contract gains (loss)	$ 500,000		$ 600,000	$ 2,100,000	$ 2,100,000	$ 2,200,000	$ (988,609)	$ (1,932,451)	$ 4,566,795	$ (84,696)	$ (1,039,585)	$ (846,581)		$ (3,226,682)	$ 5,251,438	$ (4,101,495)
Other income (expense)
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Change in fair value of derivatives not designated in hedging relationships														0.6	0
Gain (loss) on foreign currency hedge contract, ineffective portion							$ (400,000)						$ 100,000	(400,000)	$ 1,000,000
Interest Rate Swaps
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Derivative, notional amount																						$ 161,000,000
Foreign Exchange Option
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Derivative, notional amount																			95					$ 90
Foreign Currency Forward
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Derivative, notional amount																	$ 95	$ 95	$ 95		$ 95
Senior Term Loan | Interest Rate Swaps | Reclassified Out of Accumulated Other Comprehensive Income
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Settlement payment of interest rate swaps														600,000
Senior Term Loan | Interest Rate Swaps | Termination
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Derivative, notional amount		$ 75,700,000												$ 75,700,000
Settlement payment of interest rate swaps		$ 600,000

Derivative Instruments - Summar

Derivative Instruments - Summary of Derivative Financial Instruments (Detail)

Feb. 10, 2020CAD ($)

Sep. 30, 2020USD ($)$ / Unit

Dec. 31, 2019USD ($)$ / Unit

Dec. 31, 2018USD ($)$ / Unit

Aug. 03, 2020USD ($)

Dec. 31, 2019CAD ($)$ / Unit

Dec. 09, 2019CAD ($)

Jul. 08, 2019CAD ($)

Jan. 29, 2019USD ($)

Jan. 25, 2019CAD ($)

Jan. 24, 2019USD ($)

Oct. 11, 2018CAD ($)

Mar. 28, 2018CAD ($)

Derivative [Line Items]

Derivative, notional amount

$ 95,000,000

$ 161,200,000

$ 90,000,000

$ 112,000,000

$ 101,000,000

Interest Rate Swaps

Derivative [Line Items]

Derivative, notional amount

$ 161,000,000

Interest Rate Swaps | Oakland and Concord Loan

Derivative [Line Items]

Derivative, notional amount

[1]

$ 19,483,127

Interest Rate Swaps, Strike

3.95%

Interest Rate Swaps, Effective Date or Date Assumed

May 18, 2016

Interest Rate Swaps, Maturity Date

Apr. 10, 2023

Interest Rate Swaps | LIBOR Swap Effective January 24, 2019

Derivative [Line Items]

Derivative, notional amount

[2]

$ 85,512,000

Interest Rate Swaps, Strike

2.61%

2.61%

Interest Rate Swaps, Effective Date or Date Assumed

Jan. 24, 2019

Interest Rate Swaps, Maturity Date

[3]

Aug. 1, 2020

Interest Rate Swaps | LIBOR Swap Effective June 15, 2019

Derivative [Line Items]

Derivative, notional amount

$ 235,000,000

$ 235,000,000

Interest Rate Swaps, Strike

1.79%

1.79%

1.79%

Interest Rate Swaps, Effective Date or Date Assumed

Jun. 15, 2019

Jun. 15, 2019

Interest Rate Swaps, Maturity Date

Feb. 15, 2022

Feb. 15, 2022

Interest Rate Caps

Derivative [Line Items]

Derivative, notional amount

$ 80,000,000

Interest Rate Caps | LIBOR Cap Effective August 3, 2020

Derivative [Line Items]

Derivative, notional amount

$ 80,000,000

Interest Rate Swaps, Strike

0.50%

Interest Rate Swaps, Effective Date or Date Assumed

Aug. 3, 2020

Interest Rate Swaps, Maturity Date

Aug. 2, 2021

Interest Rate Caps | CDOR Cap Effective October 11, 2018

Derivative [Line Items]

Derivative, notional amount

$ 99,300,000

[4]

$ 99,300,000

[4]

$ 99,300,000

[5]

Interest Rate Swaps, Strike

3.00%

3.00%

3.00%

3.00%

Interest Rate Swaps, Effective Date or Date Assumed

Oct. 11, 2018

Oct. 11, 2018

Oct. 11, 2018

Interest Rate Swaps, Maturity Date

Oct. 15, 2021

Oct. 15, 2021

Oct. 15, 2021

Interest Rate Caps | CDOR Cap Effective March 28, 2019

Derivative [Line Items]

Derivative, notional amount

[4]

$ 1,000,000

$ 1,000,000

Interest Rate Swaps, Strike

3.00%

3.00%

3.00%

Interest Rate Swaps, Effective Date or Date Assumed

Mar. 28, 2019

Mar. 28, 2019

Interest Rate Swaps, Maturity Date

Oct. 15, 2021

Oct. 15, 2021

Interest Rate Caps | CDOR Cap Effective May 28, 2019

Derivative [Line Items]

Derivative, notional amount

[4]

$ 11,700,000

$ 11,700,000

Interest Rate Swaps, Strike

3.00%

3.00%

3.00%

Interest Rate Swaps, Effective Date or Date Assumed

May 28, 2019

May 28, 2019

Interest Rate Swaps, Maturity Date

Oct. 15, 2021

Oct. 15, 2021

Foreign Currency Forward

Derivative [Line Items]

Derivative, notional amount

$ 95,000,000

$ 95,000,000

$ 95,000,000

$ 95,000,000

Foreign Currency Forward, Notional Amount

$ 95,000,000

[4]

$ 95,000,000

[4]

$ 90,000,000

[5]

$ 95,000,000

[4]

Foreign Currency Forward, Strike | $ / Unit

1.334

1.323

1.2846

1.323

Foreign Currency Forward, Effective Date or Date Assumed

Feb. 10, 2020

Dec. 9, 2019

Mar. 28, 2018

Foreign Currency Forward, Maturity Date

Feb. 10, 2021

Feb. 10, 2021

Feb. 10, 2020

[6]

Jan. 28, 2019

[7]

[1]

The Oakland and Concord loan interest rate swap was settled on January 24, 2019 in conjunction with the SSGT Mergers.

[2]

We entered into this Swap on January 24, 2019 for an initial notional amount of approximately $161 million, however, on October 29, 2019, in connection with the settlement of the Senior Term Loan, we terminated approximately $75.7 million of this interest rate swap which required a settlement payment of approximately $0.6 million.

[3]

On August 3, 2020, we entered into a LIBOR interest rate cap for a notional amount of $80 million which caps LIBOR at 0.5% through August 2, 2021.

[4]

Notional amounts shown are denominated in CAD.

[5]

Notional amount shown is denominated in CAD.

[6]

We settled this forward on February 10, 2020, receiving a net settlement of approximately $0.5 million and simultaneously entered into another $95 million CAD foreign currency forward with a maturity date of February 10, 2021.

[7]

We settled this foreign currency forward on January 25, 2019 and received a settlement of approximately $2.1 million

Derivative Instruments - Summ_2

Derivative Instruments - Summary of Derivative Financial Instruments (Parenthetical) (Detail) $ in Millions

Feb. 10, 2020USD ($)

Oct. 29, 2019USD ($)

Jul. 08, 2019USD ($)

Jan. 25, 2019USD ($)

Jan. 25, 2019USD ($)

Mar. 28, 2018USD ($)

Sep. 30, 2020USD ($)

Jun. 30, 2020USD ($)

Mar. 31, 2020USD ($)

Sep. 30, 2019USD ($)

Jun. 30, 2019USD ($)

Mar. 31, 2019USD ($)

Sep. 30, 2020

Dec. 31, 2019USD ($)

Dec. 31, 2018USD ($)

Dec. 31, 2017USD ($)

Aug. 03, 2020USD ($)

Feb. 10, 2020CAD ($)

Dec. 09, 2019CAD ($)

Jul. 08, 2019CAD ($)

Jan. 29, 2019USD ($)

Jan. 25, 2019CAD ($)

Jan. 24, 2019USD ($)

Oct. 11, 2018CAD ($)

Mar. 28, 2018CAD ($)

Derivative [Line Items]

Foreign currency forward contract gains (loss)

$ 500,000

$ 600,000

$ 2,100,000

$ 2,100,000

$ 2,200,000

$ (988,609)

$ (1,932,451)

$ 4,566,795

$ (84,696)

$ (1,039,585)

$ (846,581)

$ (3,226,682)

$ 5,251,438

$ (4,101,495)

Derivative, notional amount

$ 95

$ 161,200,000

$ 90

$ 112

$ 101

Subsequent Event

Derivative [Line Items]

Foreign currency forward contract gains (loss)

$ 500,000

Interest Rate Caps

Derivative [Line Items]

Derivative, notional amount

$ 80,000,000

Effective interest rate cap on derivative instrument

0.50%

Foreign Currency Forward

Derivative [Line Items]

Derivative, notional amount

$ 95

$ 95

$ 95

$ 95

Foreign currency forward, maturity date

Feb. 10, 2021

Feb. 10, 2021

Feb. 10, 2020

[1]

Jan. 28, 2019

[2]

Foreign Currency Forward | Subsequent Event

Derivative [Line Items]

Derivative, notional amount

$ 95

Foreign currency forward, maturity date

Feb. 10, 2021

Interest Rate Swaps

Derivative [Line Items]

Derivative, notional amount

$ 161,000,000

Interest Rate Swaps | Senior Term Loan | Termination

Derivative [Line Items]

Derivative, notional amount

$ 75,700,000

$ 75,700,000

Settlement payment of interest rate swaps

$ 600,000

[1]

We settled this forward on February 10, 2020, receiving a net settlement of approximately $0.5 million and simultaneously entered into another $95 million CAD foreign currency forward with a maturity date of February 10, 2021.

[2]

We settled this foreign currency forward on January 25, 2019 and received a settlement of approximately $2.1 million

Derivative Instruments - Schedu

Derivative Instruments - Schedule of Fair Value of Derivative Financial Instruments and Classification In Consolidated Balance Sheets (Detail) - USD ($)	Sep. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Interest Rate Swaps | Other assets
Derivatives Fair Value [Line Items]
Derivative fair value, assets		$ 0	$ 361,802
Interest Rate Swaps | Accounts payable and accrued liabilities
Derivatives Fair Value [Line Items]
Derivative fair value, liability	$ 5,286,666	1,695,140	0
Interest Rate Caps | Other assets
Derivatives Fair Value [Line Items]
Derivative fair value, assets		28,847	87,808
Foreign Currency Hedges | Other assets
Derivatives Fair Value [Line Items]
Derivative fair value, assets			$ 4,016,806
Foreign Currency Hedges | Accounts payable and accrued liabilities
Derivatives Fair Value [Line Items]
Derivative fair value, liability	$ 149,200	$ 1,425,632

Segment Disclosures - Additiona

Segment Disclosures - Additional Information (Detail) - Segment	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Segment Reporting [Abstract]
Number of reportable business segments	2	2

Summary of Reportable Segments

Summary of Reportable Segments (Detail) - USD ($)	Mar. 25, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues:
Total revenues		$ 31,363,122				$ 29,588,014							$ 91,130,790	$ 79,451,856	$ 109,528,549	$ 80,412,257	$ 76,108,906
Operating expenses:
General and administrative		4,012,072				3,519,557							11,829,732	7,000,627	10,461,453	4,848,447	3,457,907
Depreciation		8,003,587				7,639,190							23,562,701	21,928,108	29,605,278	20,379,694	19,939,856
Intangible amortization expense	$ 1,587,899	1,587,899				3,741,046							8,475,682	7,822,354	11,493,394	2,422,997	13,512,217
Other acquisition expenses		468,577				25,529							593,903	109,765
Contingent earnout expense		1,600,000				300,000							(5,100,000)	300,000	200,000	0	0
Contingent earnout adjustment						300,000							(5,100,000)	300,000
Impairment of goodwill and intangible assets													36,465,732
Impairment of investments in Managed REITs		0				0							4,376,879	0
Self administration transaction expenses		0				107,100							0	1,595,371	1,572,238	0	0
Acquisition expenses – affiliates		0				0							0	84,061	84,061	72,179	212,577
Other property acquisition expenses		468,577				25,529							593,903	109,765	141,489	1,054,159	292,022
Total operating expenses		26,992,137	$ 27,497,027	$ 61,368,274	$ 26,965,933	27,773,486	$ 25,211,611	$ 21,934,203	$ 15,808,549	$ 15,836,436	$ 16,605,713	$ 16,010,116	115,857,438	74,919,300	101,885,233	64,260,814	72,533,795
Gain on sale of real estate															3,944,696	0	0
Operating income (loss)		4,370,985	1,972,518	(31,070,151)	7,055,456	1,814,528	768,906	1,949,122	4,378,666	4,476,633	3,439,803	3,856,341	(24,726,648)	4,532,556	11,588,012	16,151,443	3,575,111
Other income (expense):
Interest expense		(8,093,476)				(10,260,936)							(24,717,208)	(28,584,740)	(37,563,247)	(18,002,274)	(16,356,565)
Interest expense – accretion of fair market value of secured debt		32,788				33,191							98,337	98,850	131,611	413,353	340,382
Interest expense – debt issuance costs		(952,479)				(1,082,543)							(2,832,240)	(2,997,801)	(3,996,676)	(1,582,049)	(2,177,833)
Net loss on extinguishment of debt		0				0							0	(1,487,867)	(2,647,633)	0	0
Gain resulting from acquisition of unconsolidated affiliates		0				0							0	8,017,353	8,017,353	0	0
Other		185,685				(45,819)							2,914,840	(352,219)	(624,958)	(701,203)	(367,385)
Net loss		(4,456,497)	$ (7,062,841)	$ (37,743,581)	(4,321,670)	(9,541,579)	$ (2,283,972)	$ (8,948,317)	$ (1,159,075)	$ (457,278)	$ (1,437,330)	$ (667,047)	(49,262,919)	(20,773,868)	(25,095,538)	(3,720,730)	(14,986,290)
Self Storage Rental Revenue
Revenues:
Total revenues		26,706,201				25,669,615							77,221,013	74,056,235	99,494,560	78,473,091	75,408,257
Ancillary Operating Revenue
Revenues:
Total revenues		1,431,952				1,188,934							3,768,213	2,589,985	3,706,700	1,939,166	700,649
Managed REIT Platform Revenue
Revenues:
Total revenues		2,051,021				1,192,665							5,687,701	1,221,727	3,068,306	0	0
Operating expenses:
Operating expenses													2,512,103			0	0
Reimbursable Costs from Managed REITs
Revenues:
Total revenues		1,173,948				1,536,800							4,453,863	1,583,909	3,258,983	0	0
Operating expenses:
Operating expenses		1,173,948				1,536,800							4,453,863	1,583,909	3,258,983	0	0
Property Operating Expenses
Operating expenses:
Operating expenses		9,816,774				9,655,599							28,686,843	26,630,201	35,723,111	25,228,704	24,487,854
Property Operating Expenses – Affiliates
Operating expenses:
Operating expenses		0				0							0	6,605,670	6,605,670	$ 10,254,634	$ 10,631,362
Managed REIT Platform Expenses
Operating expenses:
Operating expenses		329,280				1,248,665							2,512,103	1,259,234	2,739,556
Self Storage
Revenues:
Total revenues		28,138,153				26,858,549							80,989,226	76,646,220	103,201,260
Operating expenses:
Depreciation		7,863,351				7,470,184							23,185,178	21,750,206	29,305,979
Intangible amortization expense		561,601				2,503,987							4,950,285	6,524,347	9,051,083
Other acquisition expenses		468,577				25,529							593,903	109,765
Acquisition expenses – affiliates														84,061	84,061
Other property acquisition expenses															141,489
Total operating expenses		18,710,303				19,655,299							57,416,209	61,704,250	80,911,393
Gain on sale of real estate															3,944,696
Operating income (loss)		9,427,850				7,203,250							23,573,017	14,941,970	26,234,563
Other income (expense):
Interest expense		(8,048,225)				(10,214,822)							(24,581,790)	(28,537,117)	(37,469,725)
Interest expense – accretion of fair market value of secured debt		32,788				33,191							98,337	98,850	131,611
Interest expense – debt issuance costs		(950,120)				(1,082,543)							(2,825,162)	(2,997,801)	(3,990,421)
Net loss on extinguishment of debt														(1,487,867)	(2,635,278)
Gain resulting from acquisition of unconsolidated affiliates														8,017,353	8,017,353
Other		(139,829)				(106,450)							(544,296)	(414,871)	(1,159,570)
Net loss		322,464				(4,167,374)							(4,279,894)	(10,379,483)	(10,871,467)
Self Storage | Self Storage Rental Revenue
Revenues:
Total revenues		26,706,201				25,669,615							77,221,013	74,056,235	99,494,560
Self Storage | Ancillary Operating Revenue
Revenues:
Total revenues		1,431,952				1,188,934							3,768,213	2,589,985	3,706,700
Self Storage | Property Operating Expenses
Operating expenses:
Operating expenses		9,816,774				9,655,599							28,686,843	26,630,201	35,723,111
Self Storage | Property Operating Expenses – Affiliates
Operating expenses:
Operating expenses														6,605,670	6,605,670
Managed REIT Platform
Revenues:
Total revenues		3,224,969				2,729,465							10,141,564	2,805,636	6,327,289
Operating expenses:
Intangible amortization expense		1,026,298				1,237,059							3,525,397	1,298,007	2,442,311
Contingent earnout expense		1,600,000
Contingent earnout adjustment					$ 300,000								(5,100,000)	300,000
Impairment of goodwill and intangible assets													36,465,732
Impairment of investments in Managed REITs													4,376,879
Total operating expenses		4,129,526				4,322,524							46,233,974	4,441,150	8,440,850
Operating income (loss)		(904,557)				(1,593,059)							(36,092,410)	(1,635,514)	(2,113,561)
Other income (expense):
Other		325,514				60,631							3,312,206	62,652	534,612
Net loss		(579,043)				(1,532,428)							(32,780,204)	(1,572,862)	(1,578,949)
Managed REIT Platform | Managed REIT Platform Revenue
Revenues:
Total revenues		2,051,021				1,192,665							5,687,701	1,221,727	3,068,306
Managed REIT Platform | Reimbursable Costs from Managed REITs
Revenues:
Total revenues		1,173,948				1,536,800							4,453,863	1,583,909	3,258,983
Operating expenses:
Operating expenses		1,173,948				1,536,800							4,453,863	1,583,909	3,258,983
Managed REIT Platform | Managed REIT Platform Expenses
Operating expenses:
Operating expenses		329,280				1,248,665							2,512,103	1,259,234	2,739,556
Corporate and Other
Operating expenses:
General and administrative		4,012,072				3,519,557							11,829,732	7,000,627	10,461,453
Depreciation		140,236				169,006							377,523	177,902	299,299
Contingent earnout expense															200,000
Self administration transaction expenses						107,100								1,595,371	1,572,238
Total operating expenses		4,152,308				3,795,663							12,207,255	8,773,900	12,532,990
Operating income (loss)		(4,152,308)				(3,795,663)							(12,207,255)	(8,773,900)	(12,532,990)
Other income (expense):
Interest expense		(45,251)				(46,114)							(135,418)	(47,623)	(93,522)
Interest expense – debt issuance costs		(2,359)											(7,078)		(6,255)
Net loss on extinguishment of debt															(12,355)
Other													146,930
Net loss		$ (4,199,918)				$ (3,841,777)							$ (12,202,821)	$ (8,821,523)	$ (12,645,122)

Summary of Total Assets by Segm

Summary of Total Assets by Segment (Detail) - USD ($)	Sep. 30, 2020		Dec. 31, 2019		Dec. 31, 2018
Segment Reporting Asset Reconciling Item [Line Items]
Total assets	$ 1,229,766,650		$ 1,311,433,731		$ 796,354,037
Self Storage
Segment Reporting Asset Reconciling Item [Line Items]
Total assets	1,158,358,937	[1]	1,175,887,634	[2]
Managed REIT Platform
Segment Reporting Asset Reconciling Item [Line Items]
Total assets	37,895,289	[1]	73,939,002	[2]
Corporate and Other
Segment Reporting Asset Reconciling Item [Line Items]
Total assets	$ 33,512,424		$ 61,607,095
[1]	Included in the assets of the Self Storage and the Managed REIT Platform segments as of September 30, 2020, are approximately $45.3 million and $8.4 million of goodwill, respectively.
[2]	Included in the assets of the Self Storage and the Managed REIT Platform segments are approximately $45.3 million, and $33.1 million of goodwill, respectively.

Summary of Total Assets by Se_2

Summary of Total Assets by Segment (Parenthetical) (Detail) - USD ($)	Sep. 30, 2020	Dec. 31, 2019	Jun. 28, 2019
Segment Reporting Asset Reconciling Item [Line Items]
Goodwill	$ 53,643,331	$ 78,372,980	$ 78,372,980
Self Storage
Segment Reporting Asset Reconciling Item [Line Items]
Goodwill	45,300,000	45,300,000
Managed REIT Platform
Segment Reporting Asset Reconciling Item [Line Items]
Goodwill	$ 8,400,000	$ 33,100,000

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) $ / shares in Units, $ in Millions	Nov. 12, 2020USD ($)	Sep. 21, 2020USD ($)$ / sharesshares	Sep. 12, 2020	Oct. 01, 2018USD ($)$ / shares	Oct. 02, 2017	Feb. 01, 2017USD ($)StorageFacility$ / sharesshares	Oct. 01, 2015USD ($)	Sep. 30, 2020USD ($)$ / shares	Sep. 30, 2019USD ($)	Jun. 30, 2019USD ($)	Sep. 30, 2020USD ($)StorageFacilityEmployee$ / shares	Sep. 30, 2019USD ($)	Dec. 31, 2019USD ($)StorageFacilityEmployee$ / shares	Dec. 31, 2018USD ($)$ / shares	Dec. 31, 2017USD ($)	Nov. 11, 2020USD ($)	Nov. 04, 2020USD ($)	Oct. 29, 2020USD ($)	Oct. 29, 2019USD ($)	Feb. 01, 2017CAD ($)
Related Party Transaction [Line Items]
Maximum purchase commitment amount																			$ 200,000,000
Redemption of preferred units										$ (200,000)			$ (200,000)
Number of self storage professionals acquired | Employee											350		350
Sale commission fees percentage of proceed from Primary Offering											2.00%
Maximum dealer manager commission fee percentage of proceeds from Primary Offering											3.00%		3.00%
Underwriting commission											10.00%		10.00%
Self storage rental revenue								$ 31,363,122	$ 29,588,014		$ 91,130,790	$ 79,451,856	$ 109,528,549	$ 80,412,257	$ 76,108,906
Number of self storage facilities | StorageFacility											112		112
Consideration per share of common stock | $ / shares						$ 11.0651
Debt Instrument Carrying Amount								717,069,469			$ 717,069,469		$ 719,769,887
Acquisition assumed other net liabilities						$ 800,000
Due to affiliates								818,665			818,665		1,624,474	2,203,837
Managed REIT Property Management Agreement [Member]
Related Party Transaction [Line Items]
Investment management revenue											$ 3,750
Property management fee, percent fee of gross revenues											6.00%
One time fee for former external property managers											$ 3,750
SST IV Property Manager | Managed REIT Property Management Agreement [Member]
Related Party Transaction [Line Items]
Construction management fee											5.00%
Cost of construction or capital improvement work											$ 10,000
Toronto Merger
Related Party Transaction [Line Items]
Number of self storage facilities | StorageFacility						5
Strategic Storage Trust IV, Inc.
Related Party Transaction [Line Items]
Receivables due from related parties								314,000			314,000		100,000
Strategic Storage Growth Trust, Inc
Related Party Transaction [Line Items]
Common Stock, par value | $ / shares				$ 0.001
Cash				$ 346,231,561
Debt Instrument Carrying Amount				$ 19,000,000
Receivables due from related parties								6,000			6,000		175,000
Tenant Programs
Related Party Transaction [Line Items]
Operating revenue								$ 1,200,000	$ 1,000,000		$ 3,100,000	$ 2,000,000	$ 2,900,000	1,500,000	300,000
Tenant Programs | TRS subsidiary
Related Party Transaction [Line Items]
Percentage of ownership interest in joint venture								50.00%			50.00%		50.00%
Percentage of net economics generated from tenant insurance received under terms of joint venture agreement											50.00%		50.00%
Auction Company
Related Party Transaction [Line Items]
Percentage of limited partnership interests													50.00%
Self storage rental revenue													$ 45,000	$ 43,000	$ 0
Type of Revenue [Extensible List]													us-gaap:ShareholderServiceMember	us-gaap:ShareholderServiceMember
Class A Common stock
Related Party Transaction [Line Items]
Sale commission fees percentage of proceed from Primary Offering											7.00%		7.00%
Common Stock, par value | $ / shares								$ 0.001			$ 0.001		$ 0.001	$ 0.001
Class T Common stock
Related Party Transaction [Line Items]
Sale commission fees percentage of proceed from Primary Offering													2.00%
Monthly stockholder servicing fee accrual description											accrues daily in an amount equal to 1/365th of 1% of the purchase price per share	accrues daily in an amount equal to 1/365th of 1% of the purchase price per share	accrues daily in an amount equal to 1/365th of 1% of the purchase price per share
Common Stock, par value | $ / shares								$ 0.001			$ 0.001		$ 0.001	$ 0.001
Minimum | Managed REIT Property Management Agreement [Member]
Related Party Transaction [Line Items]
Our former external property management fee											$ 3,000
Primary Offering Former Dealer Manager Agreement | Class A Common stock
Related Party Transaction [Line Items]
Percentage of gross proceeds from sale of shares											10.00%
Primary Offering Former Dealer Manager Agreement | Class T Common stock
Related Party Transaction [Line Items]
Percentage of gross proceeds from sale of shares											10.00%
SSGT II Unit Purchase Agreement
Related Party Transaction [Line Items]
Description of preferred investor distributions											The Preferred Investor will receive distributions, payable monthly in arrears, at a rate of 7.25% per annum from the date of investment until 180 days after the date of investment, 8.25% per annum from 181 days after the date of investment until 360 days after the date of investment, and 9.25% per annum thereafter (collectively, the “Pay Rate”). The proceeds of the SSGT II Investment may be used by SSGT II OP to finance self-storage acquisition, development, and improvement activities, and working capital or other general partnership purposes. Each SSGT II Preferred Unit has a liquidation preference of $25.00, plus all accumulated and unpaid distributions. The foregoing distributions shall be payable monthly, and calculated on an actual/360 day basis, and any unpaid distributions shall accrue at the applicable Pay Rate.
Maximum purchase units of limited partnership interest | shares		1,600,000
Maximum purchase commitment amount		$ 40,000,000
Percentage of investment fee due upon closing each tranche		1.00%
Preferred stock, liquidation preference per unit | $ / shares		$ 25
Investment of preferred investor		$ 6,500,000
Additional preferred investments in operating partnership								$ 33,500,000			$ 33,500,000
Income related to preferred units								$ 13,000			$ 13,000
Advisory Agreement
Related Party Transaction [Line Items]
Gross proceeds from offering, threshold percentage of expenses for reimbursement													15.00%
Reimbursement of offering cost													$ 0
Rate of acquisition fees of purchase price of contract								1.75%			1.75%		1.75%
Monthly asset management fee											0.05208%		0.05208%
Monthly asset management fee one twelfth of less than one percentage of average invested assets											one-twelfth of 0.625%		one-twelfth of 0.625%
Disposition fees percentage of sale price of property													1.00%
Operating expenses reimbursement percentage of average investment in assets													2.00%
Operating expenses reimbursement percentage of net income													25.00%
Advisory Agreement | Maximum
Related Party Transaction [Line Items]
Commission percentage of sale price of property													6.00%
Primary Offering Dealer Manager Agreement | Class A Common stock
Related Party Transaction [Line Items]
Percentage of gross proceeds from sale of shares											10.00%		10.00%
Primary Offering Dealer Manager Agreement | Class T Common stock
Related Party Transaction [Line Items]
Percentage of gross proceeds from sale of shares											10.00%		10.00%
SmartStop Asset Management
Related Party Transaction [Line Items]
Gross proceeds from offering, threshold percentage of expenses for reimbursement													15.00%
Percentage of non-voting equity owned											15.00%		15.00%
SmartStop Asset Management | Strategic Transfer Agent Services, LLC
Related Party Transaction [Line Items]
Percentage of membership interest											100.00%		100.00%
Transfer Agent Agreement
Related Party Transaction [Line Items]
Transfer agent agreement term											3 years		3 years
Transfer agent renewal agreement term											1 year		1 year
Transfer agent agreement termination description											The initial term of the transfer agent agreement is three years, which term will be automatically renewed for one year successive terms, but either party may terminate the transfer agent agreement upon 90 days prior written notice. In the event that we terminate the transfer agent agreement, other than for cause, we will pay our transfer agent all amounts that would have otherwise accrued during the remaining term of the transfer agent agreement; provided, however, that when calculating the remaining months in the term for such purposes, such term is deemed to be a 12 month period starting from the date of the most recent annual anniversary date.		The initial term of the transfer agent agreement is three years, which term will be automatically renewed for one year successive terms, but either party may terminate the transfer agent agreement upon 90 days prior written notice. In the event that we terminate the transfer agent agreement, other than for cause, we will pay our transfer agent all amounts that would have otherwise accrued during the remaining term of the transfer agent agreement; provided, however, that when calculating the remaining months in the term for such purposes, such term is deemed to be a 12 month period starting from the date of the most recent annual anniversary date.
Property Management Agreement
Related Party Transaction [Line Items]
Number of self storage professionals acquired | Employee													350
Agreement termination date					Oct. 1, 2017
Percentage of fee of former external property managers											6.00%		6.00%
Construction management fee											5.00%		5.00%
Cost of construction or capital improvement work											$ 10,000		$ 10,000
Investment management revenue											3,750		3,750
One time fee for former external property managers											3,750		$ 3,750
Property Management Agreement | SST IV Property Manager
Related Party Transaction [Line Items]
Construction management fee													5.00%
Cost of construction or capital improvement work													$ 10,000
Property Management Agreement | Minimum
Related Party Transaction [Line Items]
Our former external property management fee											$ 3,000		$ 3,000
Strategic Storage Property Management II, LLC
Related Party Transaction [Line Items]
Agreement date							Oct. 1, 2015
Property management agreement termination description															The property management agreements had a three year term and automatically renewed for successive one year periods thereafter, unless we or our Former External Property Manager provided prior written notice at least 90 days prior to the expiration of the term. In general, if we terminated a property management agreement without cause during the initial three year term, we would have been required to pay our Former External Property Manager a termination fee equal to the Set-Up Amount, reduced by 1/36th of the Set-Up Amount for every full month of the term that had elapsed. After the end of the initial three year term, we could have terminated a property management agreement on 30 days prior written notice without payment of a termination fee. Our Formal External Property Manager could have terminated a property management agreement on 60 days prior written notice to us.
Strategic Storage Property Management II, LLC | Maximum
Related Party Transaction [Line Items]
Signage and set-up costs associated with converting each property to extra space brand							$ 25,000
Strategic Storage Property Management II, LLC | Minimum
Related Party Transaction [Line Items]
Our former external property management fee							2,500
Percentage of fee of former external property managers							6
Strategic Storage Trust Sub Property Management Limited Liability Company
Related Party Transaction [Line Items]
Property management agreement termination description															The sub-property management agreements also had a three year term and automatically renewed for successive one year periods thereafter, unless our Former External Property Manager or Extra Space provided prior written notice at least 90 days prior to the expiration of the term. In general, if our Former External Property Manager terminated a sub-property management agreement without cause during the initial three year term, it would have been required to pay Extra Space a termination fee equal to the Set-Up Amount, reduced by 1/36th of the Set-Up Amount for every full month of the term that had elapsed. After the end of the initial three year term, our Former External Property Manager could have terminated a sub-property management agreement on 30 days prior written notice without payment of a termination fee. Extra Space could have terminated a sub-property management agreement on 60 days prior written notice to our Former External Property Manager.
Sub property management agreement description													Under the sub-property management agreements, our Formal External Property Manager paid Extra Space a monthly management fee for each property equal to the greater of $2,500 or 6% of the gross revenues, plus reimbursement of Extra Space’s costs of managing the properties; provided, however that no management fee was due and payable to Extra Space for the months of January and July each year during the term.
Strategic Storage Trust Sub Property Management Limited Liability Company | Minimum
Related Party Transaction [Line Items]
Our former external property management fee							2,500
Percentage of fee of former external property managers							$ 6
Termination of Sub-property Manager | Property Operating Expenses Affiliates
Related Party Transaction [Line Items]
Agreement termination date					Oct. 1, 2017
Percentage of fee of former external property managers															$ 800,000
Former External Property Manager's Affiliate | Tenant Programs
Related Party Transaction [Line Items]
Percentage of ownership interest in joint venture								50.00%			50.00%
Percentage of net economics generated from tenant insurance received under terms of joint venture agreement											50.00%
SS Toronto | Toronto Merger
Related Party Transaction [Line Items]
Common Stock, par value | $ / shares						$ 0.001
Cash						$ 7,300,000
Debt Instrument Carrying Amount						38,400,000														$ 50.1
Repayment of outstanding debt and accrued interest						33,100,000
Business acquisition fees paid to advisor						$ 0
SS Toronto | Toronto Merger | Term Loan
Related Party Transaction [Line Items]
Guarantee obligations																				34.8
SS Toronto | Toronto Merger | Promissory Notes
Related Party Transaction [Line Items]
Guarantee obligations																				$ 17.7
SS Toronto | Toronto Merger | Class A Units of Operating Partnership
Related Party Transaction [Line Items]
Operating partnership units issued per share of common stock						0.7311%
Business acquisition partnership units issued | shares						483,197
SST IV Advisor
Related Party Transaction [Line Items]
Gross proceeds from offering, threshold percentage of expenses for reimbursement								15.00%			15.00%		15.00%
Monthly asset management fee											0.0833%		0.0833%
Monthly asset management fee one twelfth of less than one percentage of average invested assets											one-twelfth of 1%		one-twelfth of 1%
Operating expenses reimbursement percentage of average investment in assets											2.00%		2.00%
Operating expenses reimbursement percentage of net income											25.00%		25.00%
Maximum period for reimbursement of offering cost											60 days		60 days
Maximum offering cost rate			3.50%								3.50%		3.50%
SST IV Advisor | Class W
Related Party Transaction [Line Items]
Percentage of offering cost without reimbursement											1.15%		1.15%
Organization and offering costs not reimbursed								$ 0			$ 25,000		$ 41,000
SST IV Advisor | Maximum
Related Party Transaction [Line Items]
Gross proceeds from offering, threshold percentage of expenses for reimbursement			15.00%
SSGT II Advisor
Related Party Transaction [Line Items]
Monthly asset management fee											0.1042%		0.1042%
Monthly asset management fee one twelfth of less than one percentage of average invested assets												one-twelfth of 1.25%	one-twelfth of 1.25%
Percentage of distribution from operating partnership											10.00%		10.00%
Annual aggregate distribution percentage											5.00%		5.00%
Administrative Services Agreement
Related Party Transaction [Line Items]
Receivables due from related parties								37,000			$ 37,000
Administrative service fees													$ 2,100,000
Due to affiliates													300,000
Administrative Services Agreement | Managed REIT Platform Expenses
Related Party Transaction [Line Items]
Administrative service fees								82,000			1,900,000
Reimbursements of administrative service fees								$ 100,000			$ 300,000		200,000
Administrative Services Agreement | Rent and Overhead for Portion in Ladera Office
Related Party Transaction [Line Items]
Reimbursements of administrative service fees													$ 100,000
Subsequent Event [Member] | SSGT II Unit Purchase Agreement
Related Party Transaction [Line Items]
Investment of preferred investor	$ 13,500,000															$ 32,500,000
Additional preferred investments in operating partnership																$ 7,500,000	$ 13,000,000	$ 13,000,000
Redemption of preferred units	$ 19,000,000
Investment Until 180 Days | SSGT II Unit Purchase Agreement
Related Party Transaction [Line Items]
Rate of distributions payable monthly in arrears		7.25%
Investment Thereafter | SSGT II Unit Purchase Agreement
Related Party Transaction [Line Items]
Rate of distributions payable monthly in arrears		9.25%
Investment After 181 Days Until 360 Days | SSGT II Unit Purchase Agreement
Related Party Transaction [Line Items]
Rate of distributions payable monthly in arrears		8.25%

Summary of Related Party Costs

Summary of Related Party Costs (Detail) - USD ($)		9 Months Ended		12 Months Ended
		Sep. 30, 2020		Dec. 31, 2019		Dec. 31, 2018
Related Party Transaction [Line Items]
Related party costs, Incurred		$ 465,520		$ 8,720,375		$ 12,927,373
Related party costs, Paid		924,195		9,646,872		13,689,440
Related party costs, Payable		818,665		1,624,474		2,203,837
Dealer Manager
Related Party Transaction [Line Items]
Related party costs, Payable		818,665		1,277,340
Operating Expenses Expensed
Related Party Transaction [Line Items]
Related party costs, Incurred				975,985		2,199,596
Related party costs, Paid				1,185,370		2,336,075
Related party costs, Payable						209,385
Transfer Agent fees
Related Party Transaction [Line Items]
Related party costs, Incurred		465,520		324,943		352,300
Related party costs, Paid		438,520		374,404		302,839
Related party costs, Payable						49,461
Transfer Agent fees | Dealer Manager
Related Party Transaction [Line Items]
Related party costs, Payable		27,000
Asset management fees
Related Party Transaction [Line Items]
Related party costs, Incurred				3,622,559		5,445,528
Related party costs, Paid				3,622,559		5,445,528
Property management fees
Related Party Transaction [Line Items]
Related party costs, Incurred				2,983,111		4,809,106
Related party costs, Paid				2,983,111		4,809,106
Acquisition expenses
Related Party Transaction [Line Items]
Related party costs, Incurred				84,061		72,179
Related party costs, Paid				84,061		72,179
Acquisition costs
Related Party Transaction [Line Items]
Related party costs, Incurred				235,932		48,664
Related party costs, Paid				235,932		48,664
Self Administration Transaction Working Capital True-up
Related Party Transaction [Line Items]
Related party costs, Incurred				493,785
Related party costs, Paid				493,785
Stockholder servicing fee
Related Party Transaction [Line Items]
Related party costs, Paid		485,675	[1]	667,651	[2]	675,049	[2]
Related party costs, Payable	[2]					$ 1,944,991
Stockholder servicing fee | Dealer Manager
Related Party Transaction [Line Items]
Related party costs, Payable	[1]	$ 791,665		$ 1,277,340
[1]	We pay our Former Dealer Manager an ongoing stockholder servicing fee that is payable monthly and accrues daily in an amount equal to 1/365th of 1% of the purchase price per share of the Class T Shares sold in the Primary Offering.
[2]	We pay our Dealer Manager an ongoing stockholder servicing fee that is payable monthly and accrues daily in an amount equal to 1/365th of 1% of the purchase price per share of the Class T Shares sold in the Primary Offering.

Summary of Related Party Cost_2

Summary of Related Party Costs (Parenthetical) (Detail)	9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Class T Common stock
Related Party Transaction [Line Items]
Monthly stockholder servicing fee accrual description	accrues daily in an amount equal to 1/365th of 1% of the purchase price per share	accrues daily in an amount equal to 1/365th of 1% of the purchase price per share	accrues daily in an amount equal to 1/365th of 1% of the purchase price per share
Former Dealer Manager
Related Party Transaction [Line Items]
Monthly stockholder servicing fee accrual description				accrues daily in an amount equal to 1/365th of 1% of the purchase price per share
Former Dealer Manager | Class T Common stock
Related Party Transaction [Line Items]
Monthly stockholder servicing fee accrual description	accrues daily in an amount equal to 1/365th of 1% of the purchase price per share		accrues daily in an amount equal to 1/365th of 1% of the purchase price per share	accrues daily in an amount equal to 1/365th of 1% of the purchase price per share

Related Party Transactions - Su

Related Party Transactions - Summary of Fees and Revenue Related to the Managed REITs (Detail) - USD ($)	3 Months Ended				9 Months Ended				12 Months Ended
	Sep. 30, 2020		Sep. 30, 2019		Sep. 30, 2020		Sep. 30, 2019		Dec. 31, 2019
Related Party Transaction [Line Items]
Managed REIT Platform Revenues	$ 2,051,021		$ 1,192,665		$ 5,687,701		$ 1,221,727		$ 3,068,306
Strategic Storage Trust IV Property Management Agreement
Related Party Transaction [Line Items]
Managed REIT Platform Revenues	367,256		288,026		1,039,753		296,300		602,162
Strategic Storage Growth Trust II Property Management Agreement
Related Party Transaction [Line Items]
Managed REIT Platform Revenues	90,069		40,222		241,624		40,822		91,594
Strategic Storage Trust IV Advisory Agreement
Related Party Transaction [Line Items]
Managed REIT Platform Revenues	813,052		490,844		2,358,906		506,470		1,153,137
Strategic Storage Growth Trust II Advisory Agreement
Related Party Transaction [Line Items]
Managed REIT Platform Revenues	281,839		117,380		788,932		121,942		310,786
Strategic Storage Trust IV Tenant Program Revenue
Related Party Transaction [Line Items]
Managed REIT Platform Revenues	252,885		120,498		610,635		120,498		254,148
Strategic Storage Growth Trust II Tenant Program Revenue
Related Party Transaction [Line Items]
Managed REIT Platform Revenues	73,011		15,895		152,624		15,895		37,269
Other Managed REIT Revenue
Related Party Transaction [Line Items]
Managed REIT Platform Revenues	$ 172,909	[1]	$ 119,800	[1]	$ 495,227	[1]	$ 119,800	[1]	$ 619,210	[2]
[1]	Such revenues primarily includes construction management and development fees.
[2]	Such revenues primarily includes construction management, development, and acquisitions related fees.

Equity Based Compensation - Add

Equity Based Compensation - Additional Information (Detail) - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Dec. 31, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period			4 years
Share based compensation expense	$ 500,000	$ 1,200,000
Unrecognized compensation expense related to non-vested restricted stock awards	$ 4,200,000	$ 4,200,000	$ 2,200,000
Unrecognized compensation expense, expected weighted average-recognition period		2 years 8 months 12 days	3 years 10 months 24 days
General and Administrative Expense
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation expense			$ 405,000
Performance Based Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Awards vesting date		Mar. 31, 2023
Employee and Director Long-term Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for issuance	5,330,483	5,330,483	5,630,071
Restricted Stock [Member] | Performance Based Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of established target performance criteria		100.00%
Share based compensation arrangement by share based payment award voting rights		do not have
Long Term Incentive Plan Units [Member] | Performance Based Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of established target performance criteria		200.00%
Description of distribution and allocation of profits and losses		Recipients of performance based LTIP Units are issued LTIP Units at 200% of the targeted award and are entitled to receive distributions and allocations of profits and losses with respect to the performance based LTIP Units as of the effective date of January 1, 2020 in an amount equal to 10% of the distributions and allocations available to such LTIP Units, until the Distribution Participation Date (as defined in the Partnership Agreement). The remaining 90% of distributions will accrue and will be payable on the Distribution Participation Date based upon the performance level attained and number of performance based LTIP Units that vest.
Share based compensation arrangement by share based payment award voting rights		one vote per LTIP Unit
Maximum [Member] | Restricted Stock [Member] | Time Based Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period		4 years
Maximum [Member] | Long Term Incentive Plan Units [Member] | Performance Based Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of established target performance criteria		200.00%
Minimum [Member] | Long Term Incentive Plan Units [Member] | Performance Based Awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of established target performance criteria		0.00%

Equity Based Compensation - Sch

Equity Based Compensation - Schedule of Non-vested Restricted Stock Grants (Detail) - Restricted Stock	12 Months Ended
	Dec. 31, 2019$ / sharesshares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unvested Shares, Beginning balance | shares	21,438
Non-Vested Shares, Granted | shares	251,993
Non-Vested Shares, Vested | shares	(7,625)
Unvested Shares, Ending Balance | shares	265,806
Unvested Weighted-Average Grant-Date Fair Value, Beginning balance | $ / shares	$ 10.38
Non-Vested Weighted-Average Grant-Date Fair Value, Granted | $ / shares	9.48
Non-Vested Weighted-Average Grant-Date Fair Value, Vested | $ / shares	10.29
Unvested Weighted-Average Grant-Date Fair Value, Ending balance | $ / shares	$ 9.53

Equity Based Compensation - Sum

Equity Based Compensation - Summary of the Activity Related to Time Based Awards (Details) - Time Based Awards - $ / shares	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unvested Shares, Beginning balance	265,806	21,438
Unvested Shares, Granted	72,383	251,993
Non-Vested Shares, Vested	(81,618)	(7,625)
Unvested Shares, Forfeited	(6,567)
Unvested Shares, Ending Balance	250,004	265,806
Unvested Weighted-Average Grant-Date Fair Value, Beginning balance	$ 9.53	$ 10.38
Unvested Weighted-Average Grant-Date Fair Value, Granted	9.78	9.48
Unvested Weighted-Average Grant-Date Fair Value, Vested	9.57	10.29
Unvested Weighted-Average Grant-Date Fair Value, Forfeited	9.78
Unvested Weighted-Average Grant-Date Fair Value, Ending balance	$ 9.58	$ 9.53
LTIPs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unvested Shares, Granted	214,521
Unvested Shares, Ending Balance	214,521
Unvested Weighted-Average Grant-Date Fair Value, Granted	$ 9.09
Unvested Weighted-Average Grant-Date Fair Value, Ending balance	$ 9.09

Equity Based Compensation - S_2

Equity Based Compensation - Summary of the Activity Related to Performance Based Awards (Details) - Performance Based Awards	9 Months Ended
	Sep. 30, 2020$ / sharesshares
Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Non-Vested Shares, Granted | shares	5,752
Unvested Shares, Ending Balance | shares	5,752
Unvested Weighted-Average Grant-Date Fair Value, Granted | $ / shares	$ 9.78
Unvested Weighted-Average Grant-Date Fair Value, Ending balance | $ / shares	$ 9.78
LTIPs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Non-Vested Shares, Granted | shares	130,638
Unvested Shares, Ending Balance | shares	130,638
Unvested Weighted-Average Grant-Date Fair Value, Granted | $ / shares	$ 9.09
Unvested Weighted-Average Grant-Date Fair Value, Ending balance | $ / shares	$ 9.09

Stock for Redemptions Based on

Stock for Redemptions Based on Number of Years Stock Held (Detail)	12 Months Ended
	Dec. 31, 2019
Less than 1
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Redemption price	0.00%
1 or more but less than 3
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Redemption price	90.00%
3 or more but less than 4
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Redemption price	95.00%
4 or more
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Redemption price	100.00%

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($)	Jan. 09, 2017	Nov. 30, 2016	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Sep. 30, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Apr. 20, 2020	Jun. 26, 2019
Commitments And Contingencies [Line Items]
Additional shares issued pursuant to distribution reinvestment plan, value						$ 4,011,063	$ 4,011,353	$ 3,979,539	$ 4,046,381	$ 4,049,444	$ 3,963,766			$ 16,046,534	$ 16,057,113	$ 16,006,277
Amendment, suspension or termination period for distribution reinvestment Plan													30 days
Amendment, suspension or termination period of share														30 days
Redemptions of common stock, value							1	$ 42	200	211	141			$ 592	788	188
Distribution Reinvestment Plan
Commitments And Contingencies [Line Items]
Amendment, suspension or termination period for distribution reinvestment Plan													10 days
Sales commissions, dealer manager fee, or stockholder servicing fee payable						$ 0							$ 0
Amendment, suspension or termination period of share														10 days
Distribution Reinvestment Plan | Maximum
Commitments And Contingencies [Line Items]
Additional shares issued pursuant to distribution reinvestment plan, value		$ 100,900,000
Share Redemption Program
Commitments And Contingencies [Line Items]
Maximum weighted-average number of shares outstanding percentage													5.00%
Redemptions of common stock (in shares)						100,000						100,000		500,000
Redemptions of common stock, value			$ 400,000	$ 1,300,000	$ 700,000	$ 700,000						$ 1,300,000		$ 4,900,000	$ 900,000	$ 200,000
Share Redemption Program | Subsequent Event
Commitments And Contingencies [Line Items]
Redemptions of common stock, value			$ 400,000
Operating Partnership Redemption Rights
Commitments And Contingencies [Line Items]
Number of shares issuable upon conversion of partnership units													1	1
Requisite minimum outstanding period for conversion eligibility													1 year	1 year
Class A and Class T Common Stock | Distribution Reinvestment Plan
Commitments And Contingencies [Line Items]
Estimated value per share under distribution reinvestment plan																	$ 10.40	$ 10.66
Class A Common stock | Distribution Reinvestment Plan
Commitments And Contingencies [Line Items]
Shares issued pursuant to distribution reinvestment plan	1,100,000												5,000,000	4,000,000
Class T Common stock | Distribution Reinvestment Plan
Commitments And Contingencies [Line Items]
Shares issued pursuant to distribution reinvestment plan	100,000												800,000	600,000
Redeemable Common Stock
Commitments And Contingencies [Line Items]
Redemptions of common stock (in shares)														4,900,000	8,300,000	2,200,000
Redemptions of common stock, value						$ 1,269,644	$ 7,500		$ 349,700	$ 2,052,078	$ 2,044,001			$ 4,881,988	$ 8,325,829	$ 2,219,328
Redeemable Common Stock | Share Redemption Program
Commitments And Contingencies [Line Items]
Redemptions of common stock (in shares)						100,000						0
Redemptions of common stock, value						$ 1,300,000								$ 4,500,000	$ 7,000,000	$ 1,500,000

Declaration of Distributions -

Declaration of Distributions - Additional Information (Detail) - $ / shares	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019	Sep. 25, 2020	Aug. 31, 2020	Jul. 31, 2020	Jun. 30, 2020	May 31, 2020	Apr. 30, 2020	Dec. 18, 2019
Class A Common stock
Dividend Declared [Line Items]
Common stock per share outstanding per day authorized	$ 0.00164		$ 0.00164	$ 0.00164	$ 0.00164	$ 0.00164	$ 0.00164	$ 0.00164
Common stock per share outstanding per day declared									$ 0.001639
Cash distribution record date start	Oct. 1, 2020	Jan. 1, 2020
Cash distribution record date end	Dec. 31, 2020	Mar. 31, 2020
Class T Common stock
Dividend Declared [Line Items]
Common stock per share outstanding per day authorized	$ 0.00164		$ 0.00164	$ 0.00164	$ 0.00164	$ 0.00164	$ 0.00164	$ 0.00164
Common stock per share outstanding per day declared									0.001639
Cash distribution record date start		Jan. 1, 2020
Cash distribution record date end		Mar. 31, 2020
Common stock dividends payable per share per day	$ 0.0014								$ 0.0014

Selected Quarterly Data - Summa

Selected Quarterly Data - Summary of Quarterly Financial Information (Detail) - USD ($)	3 Months Ended											9 Months Ended		12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Schedule Of Quarterly Financial Information [Line Items]
Total revenues	$ 31,363,122	$ 29,469,545	$ 30,298,123	$ 30,076,693	$ 29,588,014	$ 25,980,517	$ 23,883,325	$ 20,187,215	$ 20,313,069	$ 20,045,516	$ 19,866,457
Total operating expenses	26,992,137	27,497,027	61,368,274	26,965,933	27,773,486	25,211,611	21,934,203	15,808,549	15,836,436	16,605,713	16,010,116	$ 115,857,438	$ 74,919,300	$ 101,885,233	$ 64,260,814	$ 72,533,795
Operating income (loss)	4,370,985	1,972,518	(31,070,151)	7,055,456	1,814,528	768,906	1,949,122	4,378,666	4,476,633	3,439,803	3,856,341	(24,726,648)	4,532,556	11,588,012	16,151,443	3,575,111
Net loss	(4,456,497)	(7,062,841)	(37,743,581)	(4,321,670)	(9,541,579)	(2,283,972)	(8,948,317)	(1,159,075)	(457,278)	(1,437,330)	(667,047)	(49,262,919)	(20,773,868)	(25,095,538)	(3,720,730)	(14,986,290)
Net loss attributable to common stockholders	$ (6,259,114)	$ (8,491,421)	$ (35,073,951)	$ (5,431,504)	$ (8,214,826)	$ (2,212,445)	$ (8,891,558)	$ (1,158,694)	$ (451,424)	$ (1,427,056)	$ (661,203)	$ (49,824,486)	$ (19,318,829)	$ (24,750,333)	$ (3,698,377)	$ (14,864,065)
Class A Common stock
Schedule Of Quarterly Financial Information [Line Items]
Net loss per share-basic and diluted	$ (0.10)	$ (0.14)	$ (0.59)	$ (0.09)	$ (0.14)	$ (0.04)	$ (0.15)	$ (0.02)	$ (0.01)	$ (0.02)	$ (0.01)	$ (0.84)	$ (0.33)	$ (0.42)	$ (0.06)	$ (0.27)
Class T Common stock
Schedule Of Quarterly Financial Information [Line Items]
Net loss per share-basic and diluted	$ (0.10)	$ (0.14)	$ (0.59)	$ (0.09)	$ (0.14)	$ (0.04)	$ (0.15)	$ (0.02)	$ (0.01)	$ (0.02)	$ (0.01)	$ (0.84)	$ (0.33)	$ (0.42)	$ (0.06)	$ (0.27)

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) $ / shares in Units, ft² in Millions

Nov. 12, 2020USD ($)

Nov. 10, 2020USD ($)ft²StorageUnitStorageFacilityStateRealEstateVenture$ / sharesshares

Oct. 28, 2020shares

Oct. 26, 2020USD ($)shares

Mar. 25, 2020USD ($)shares

Oct. 29, 2019shares

Jun. 30, 2019USD ($)

Sep. 30, 2020USD ($)StorageFacilityState$ / shares

Dec. 31, 2019USD ($)StorageFacilityState$ / shares

Dec. 31, 2017USD ($)

Nov. 11, 2020USD ($)

Nov. 04, 2020USD ($)

Oct. 29, 2020USD ($)

Sep. 21, 2020USD ($)

Dec. 31, 2018$ / shares

Oct. 01, 2018StorageFacilityState

Subsequent Event [Line Items]

Redemption of preferred units

$ (200,000)

$ (200,000)

Number of self storage facilities | StorageFacility

112

112

Number of states located for self storage facilities | State

17

17

10

Number of operating self storage facilities | StorageFacility

28

Number of parcels of land being developed into self storage facilities | StorageFacility

1

Gross proceeds from issuance of common stock

$ 18,879,477

Canada

Subsequent Event [Line Items]

Number of operating self storage facilities | StorageFacility

1

Subsequent Event | SST IV Merger Agreement

Subsequent Event [Line Items]

Increase in net asset value per share | $ / shares

$ 0.10

Net asset value per share | $ / shares

$ 10.40

Transaction value

$ 370,000,000

Number of self storage facilities | StorageFacility

24

Number of states located for self storage facilities | State

9

Number of self storage units | StorageUnit

18,000

Net rentable area | ft²

2

Fees payable for termination of merger agreement

$ 7,200,000

Subsequent Event | SST IV Merger Agreement | Canada

Subsequent Event [Line Items]

Percentage of voting membership interest

50.00%

Number of unconsolidated real estate ventures | RealEstateVenture

5

Number of operating self storage facilities | StorageFacility

1

Number of parcels of land being developed into self storage facilities | StorageFacility

4

Subsequent Event | SST IV Merger Agreement | Canada | SmartCentres Real Estate Investment Trust

Subsequent Event [Line Items]

Percentage of ownership hold by unaffiliated third party

50.00%

SSGT II Unit Purchase Agreement

Subsequent Event [Line Items]

Additional preferred investment in operating partnership

$ 33,500,000

Investment of preferred investor

$ 6,500,000

SSGT II Unit Purchase Agreement | Subsequent Event

Subsequent Event [Line Items]

Additional preferred investment in operating partnership

$ 7,500,000

$ 13,000,000

$ 13,000,000

Redemption of preferred units

$ 19,000,000

Investment of preferred investor

$ 13,500,000

$ 32,500,000

Series A Preferred Stock | SSGT II Unit Purchase Agreement | Subsequent Event

Subsequent Event [Line Items]

Proceeds from issuance of preferred stock

$ 50,000,000

SST IV Class A Common Stock | Subsequent Event | SST IV Merger Agreement

Subsequent Event [Line Items]

Common Stock, par value | $ / shares

$ 0.001

SST IV Class T Common Stock | Subsequent Event | SST IV Merger Agreement

Subsequent Event [Line Items]

Common Stock, par value | $ / shares

0.001

Class W Common Stock | Subsequent Event | SST IV Merger Agreement

Subsequent Event [Line Items]

Common Stock, par value | $ / shares

0.001

Class A Common stock

Subsequent Event [Line Items]

Common Stock, par value | $ / shares

$ 0.001

$ 0.001

$ 0.001

Class A Common stock | SST IV Merger Agreement

Subsequent Event [Line Items]

Conversion of right to receive shares, description

converted into the right to receive 2.1875 shares of the Company’s Class A Common Stock, $0.001 par value per share

Class A Common stock | Subsequent Event

Subsequent Event [Line Items]

Number of common stock issued | shares

4,300,000

Gross proceeds from issuance of common stock

$ 45,200,000

Class A Common stock | Subsequent Event | SST IV Merger Agreement

Subsequent Event [Line Items]

Common Stock, par value | $ / shares

$ 0.001

Number of right to receive shares from conversion | shares

2.1875

Class T Common stock

Subsequent Event [Line Items]

Common Stock, par value | $ / shares

$ 0.001

$ 0.001

$ 0.001

Class T Common stock | Subsequent Event

Subsequent Event [Line Items]

Number of common stock issued | shares

700,000

Gross proceeds from issuance of common stock

$ 6,900,000

Series A Preferred Stock Purchase Agreement

Subsequent Event [Line Items]

Maximum shares agreed to purchase | shares

200,000

Initial closing shares | shares

150,000

Additional purchase commitment shares | shares

50,000

Series A Preferred Stock Purchase Agreement | SSGT II Unit Purchase Agreement | Subsequent Event

Subsequent Event [Line Items]

Preferred stock, shares issued | shares

50,000

Schedule III Real Estate Asset

Schedule III Real Estate Asset and Accumulated Depreciation (Detail)	12 Months Ended
	Dec. 31, 2019USD ($)
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 719,769,888
Initial Cost to Company, Land	334,865,685
Initial Cost to Company, Buildings and Improvements	823,989,800
Initial Cost to Company, Total	1,158,855,485
Cost Capitalized Subsequent to Acquisition	26,589,304
Gross Carrying Amount, Land	332,350,688
Gross Carrying Amount, Buildings and Improvements	841,474,680
Gross Carrying Amount, Total	1,173,825,368	[1]
Accumulated Depreciation	83,692,491
Morrisville | North Carolina
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	3,109,374
Initial Cost to Company, Land	531,000
Initial Cost to Company, Buildings and Improvements	1,891,000
Initial Cost to Company, Total	2,422,000
Cost Capitalized Subsequent to Acquisition	111,669
Gross Carrying Amount, Land	531,000
Gross Carrying Amount, Buildings and Improvements	2,002,669
Gross Carrying Amount, Total	2,533,669	[1]
Accumulated Depreciation	$ 402,431
Date of Construction	2004
Date Acquired	Nov. 3, 2014
Cary | North Carolina
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 5,289,973
Initial Cost to Company, Land	1,064,000
Initial Cost to Company, Buildings and Improvements	3,301,000
Initial Cost to Company, Total	4,365,000
Cost Capitalized Subsequent to Acquisition	104,393
Gross Carrying Amount, Land	1,064,000
Gross Carrying Amount, Buildings and Improvements	3,405,393
Gross Carrying Amount, Total	4,469,393	[1]
Accumulated Depreciation	$ 650,300
Date of Construction	1998/2005/2006
Date Acquired	Nov. 3, 2014
Raleigh | North Carolina
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 4,482,344
Initial Cost to Company, Land	1,186,000
Initial Cost to Company, Buildings and Improvements	2,540,000
Initial Cost to Company, Total	3,726,000
Cost Capitalized Subsequent to Acquisition	206,819
Gross Carrying Amount, Land	1,186,000
Gross Carrying Amount, Buildings and Improvements	2,746,819
Gross Carrying Amount, Total	3,932,819	[1]
Accumulated Depreciation	$ 615,086
Date of Construction	1999
Date Acquired	Nov. 3, 2014
Myrtle Beach I | South Carolina | Property One
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 8,606,670
Initial Cost to Company, Land	1,482,000
Initial Cost to Company, Buildings and Improvements	4,476,000
Initial Cost to Company, Total	5,958,000
Cost Capitalized Subsequent to Acquisition	339,706
Gross Carrying Amount, Land	1,482,000
Gross Carrying Amount, Buildings and Improvements	4,815,706
Gross Carrying Amount, Total	6,297,706	[1]
Accumulated Depreciation	$ 947,514
Date of Construction	1998/2005-2007
Date Acquired	Nov. 3, 2014
Myrtle Beach II | South Carolina | Property Two
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 6,970,422
Initial Cost to Company, Land	1,690,000
Initial Cost to Company, Buildings and Improvements	3,654,000
Initial Cost to Company, Total	5,344,000
Cost Capitalized Subsequent to Acquisition	216,056
Gross Carrying Amount, Land	1,690,000
Gross Carrying Amount, Buildings and Improvements	3,870,056
Gross Carrying Amount, Total	5,560,056	[1]
Accumulated Depreciation	$ 793,377
Date of Construction	1999/2006
Date Acquired	Nov. 3, 2014
Whittier | California
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 4,602,761
Initial Cost to Company, Land	2,730,000
Initial Cost to Company, Buildings and Improvements	2,916,875
Initial Cost to Company, Total	5,646,875
Cost Capitalized Subsequent to Acquisition	419,262
Gross Carrying Amount, Land	2,730,000
Gross Carrying Amount, Buildings and Improvements	3,336,137
Gross Carrying Amount, Total	6,066,137	[1]
Accumulated Depreciation	$ 692,786
Date of Construction	1989
Date Acquired	Feb. 19, 2015
La Verne | California
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 3,167,492
Initial Cost to Company, Land	1,950,000
Initial Cost to Company, Buildings and Improvements	2,036,875
Initial Cost to Company, Total	3,986,875
Cost Capitalized Subsequent to Acquisition	291,367
Gross Carrying Amount, Land	1,950,000
Gross Carrying Amount, Buildings and Improvements	2,328,242
Gross Carrying Amount, Total	4,278,242	[1]
Accumulated Depreciation	$ 516,456
Date of Construction	1986
Date Acquired	Jan. 23, 2015
Santa Ana | California
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 5,196,666
Initial Cost to Company, Land	4,890,000
Initial Cost to Company, Buildings and Improvements	4,006,875
Initial Cost to Company, Total	8,896,875
Cost Capitalized Subsequent to Acquisition	308,327
Gross Carrying Amount, Land	4,890,000
Gross Carrying Amount, Buildings and Improvements	4,315,202
Gross Carrying Amount, Total	9,205,202	[1]
Accumulated Depreciation	$ 931,310
Date of Construction	1978
Date Acquired	Feb. 5, 2015
Upland | California
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 3,612,920
Initial Cost to Company, Land	2,950,000
Initial Cost to Company, Buildings and Improvements	3,016,875
Initial Cost to Company, Total	5,966,875
Cost Capitalized Subsequent to Acquisition	400,245
Gross Carrying Amount, Land	2,950,000
Gross Carrying Amount, Buildings and Improvements	3,417,120
Gross Carrying Amount, Total	6,367,120	[1]
Accumulated Depreciation	$ 753,589
Date of Construction	1979
Date Acquired	Jan. 29, 2015
La Habra | California
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 3,662,412
Initial Cost to Company, Land	2,060,000
Initial Cost to Company, Buildings and Improvements	2,356,875
Initial Cost to Company, Total	4,416,875
Cost Capitalized Subsequent to Acquisition	303,463
Gross Carrying Amount, Land	2,060,000
Gross Carrying Amount, Buildings and Improvements	2,660,338
Gross Carrying Amount, Total	4,720,338	[1]
Accumulated Depreciation	$ 518,792
Date of Construction	1981
Date Acquired	Feb. 5, 2015
Monterey Park | California
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 2,573,587
Initial Cost to Company, Land	2,020,000
Initial Cost to Company, Buildings and Improvements	2,216,875
Initial Cost to Company, Total	4,236,875
Cost Capitalized Subsequent to Acquisition	210,031
Gross Carrying Amount, Land	2,020,000
Gross Carrying Amount, Buildings and Improvements	2,426,906
Gross Carrying Amount, Total	4,446,906	[1]
Accumulated Depreciation	$ 483,171
Date of Construction	1987
Date Acquired	Feb. 5, 2015
Huntington Beach | California
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 6,978,379
Initial Cost to Company, Land	5,460,000
Initial Cost to Company, Buildings and Improvements	4,856,875
Initial Cost to Company, Total	10,316,875
Cost Capitalized Subsequent to Acquisition	420,732
Gross Carrying Amount, Land	5,460,000
Gross Carrying Amount, Buildings and Improvements	5,277,607
Gross Carrying Amount, Total	10,737,607	[1]
Accumulated Depreciation	$ 1,048,530
Date of Construction	1986
Date Acquired	Feb. 5, 2015
Chico | California
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 1,163,063
Initial Cost to Company, Land	400,000
Initial Cost to Company, Buildings and Improvements	1,336,875
Initial Cost to Company, Total	1,736,875
Cost Capitalized Subsequent to Acquisition	227,225
Gross Carrying Amount, Land	400,000
Gross Carrying Amount, Buildings and Improvements	1,564,100
Gross Carrying Amount, Total	1,964,100	[1]
Accumulated Depreciation	$ 338,409
Date of Construction	1984
Date Acquired	Jan. 23, 2015
Lancaster | California | Property One
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 1,682,730
Initial Cost to Company, Land	200,000
Initial Cost to Company, Buildings and Improvements	1,516,875
Initial Cost to Company, Total	1,716,875
Cost Capitalized Subsequent to Acquisition	326,487
Gross Carrying Amount, Land	200,000
Gross Carrying Amount, Buildings and Improvements	1,843,362
Gross Carrying Amount, Total	2,043,362	[1]
Accumulated Depreciation	$ 429,551
Date of Construction	1980
Date Acquired	Jan. 29, 2015
Lancaster | Canada | Property Two
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 2,350,873
Initial Cost to Company, Land	670,392
Initial Cost to Company, Buildings and Improvements	3,711,424
Initial Cost to Company, Total	4,381,816
Cost Capitalized Subsequent to Acquisition	234,616
Gross Carrying Amount, Land	670,392
Gross Carrying Amount, Buildings and Improvements	3,946,040
Gross Carrying Amount, Total	4,616,432	[1]
Accumulated Depreciation	$ 619,503
Date of Construction	1991
Date Acquired	Jan. 11, 2016
Riverside | California
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 2,326,127
Initial Cost to Company, Land	370,000
Initial Cost to Company, Buildings and Improvements	2,326,875
Initial Cost to Company, Total	2,696,875
Cost Capitalized Subsequent to Acquisition	443,806
Gross Carrying Amount, Land	370,000
Gross Carrying Amount, Buildings and Improvements	2,770,681
Gross Carrying Amount, Total	3,140,681	[1]
Accumulated Depreciation	$ 559,516
Date of Construction	1985
Date Acquired	Jan. 23, 2015
Fairfield | California
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 2,746,809
Initial Cost to Company, Land	730,000
Initial Cost to Company, Buildings and Improvements	2,946,875
Initial Cost to Company, Total	3,676,875
Cost Capitalized Subsequent to Acquisition	99,100
Gross Carrying Amount, Land	730,000
Gross Carrying Amount, Buildings and Improvements	3,045,975
Gross Carrying Amount, Total	3,775,975	[1]
Accumulated Depreciation	$ 616,798
Date of Construction	1984
Date Acquired	Jan. 23, 2015
Lompoc | California
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 2,821,047
Initial Cost to Company, Land	1,000,000
Initial Cost to Company, Buildings and Improvements	2,746,875
Initial Cost to Company, Total	3,746,875
Cost Capitalized Subsequent to Acquisition	150,688
Gross Carrying Amount, Land	1,000,000
Gross Carrying Amount, Buildings and Improvements	2,897,563
Gross Carrying Amount, Total	3,897,563	[1]
Accumulated Depreciation	$ 576,227
Date of Construction	1982
Date Acquired	Feb. 5, 2015
Santa Rosa | California
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 7,324,823
Initial Cost to Company, Land	3,150,000
Initial Cost to Company, Buildings and Improvements	6,716,875
Initial Cost to Company, Total	9,866,875
Cost Capitalized Subsequent to Acquisition	369,705
Gross Carrying Amount, Land	3,150,000
Gross Carrying Amount, Buildings and Improvements	7,086,580
Gross Carrying Amount, Total	10,236,580	[1]
Accumulated Depreciation	$ 1,393,470
Date of Construction	1979-1981
Date Acquired	Jan. 29, 2015
Vallejo | California
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 8,237,821
Initial Cost to Company, Land	990,000
Initial Cost to Company, Buildings and Improvements	3,946,875
Initial Cost to Company, Total	4,936,875
Cost Capitalized Subsequent to Acquisition	173,697
Gross Carrying Amount, Land	990,000
Gross Carrying Amount, Buildings and Improvements	4,120,572
Gross Carrying Amount, Total	5,110,572	[1]
Accumulated Depreciation	$ 824,942
Date of Construction	1981
Date Acquired	Jan. 29, 2015
Federal Heights | Colorado
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 2,375,619
Initial Cost to Company, Land	1,100,000
Initial Cost to Company, Buildings and Improvements	3,346,875
Initial Cost to Company, Total	4,446,875
Cost Capitalized Subsequent to Acquisition	344,130
Gross Carrying Amount, Land	1,100,000
Gross Carrying Amount, Buildings and Improvements	3,691,005
Gross Carrying Amount, Total	4,791,005	[1]
Accumulated Depreciation	$ 833,053
Date of Construction	1983
Date Acquired	Jan. 29, 2015
Aurora | Colorado
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 4,800,729
Initial Cost to Company, Land	810,000
Initial Cost to Company, Buildings and Improvements	5,906,875
Initial Cost to Company, Total	6,716,875
Cost Capitalized Subsequent to Acquisition	500,621
Gross Carrying Amount, Land	810,000
Gross Carrying Amount, Buildings and Improvements	6,407,496
Gross Carrying Amount, Total	7,217,496	[1]
Accumulated Depreciation	$ 1,256,353
Date of Construction	1984
Date Acquired	Feb. 5, 2015
Littleton | Colorado
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 2,177,650
Initial Cost to Company, Land	1,680,000
Initial Cost to Company, Buildings and Improvements	2,456,875
Initial Cost to Company, Total	4,136,875
Cost Capitalized Subsequent to Acquisition	281,681
Gross Carrying Amount, Land	1,680,000
Gross Carrying Amount, Buildings and Improvements	2,738,556
Gross Carrying Amount, Total	4,418,556	[1]
Accumulated Depreciation	$ 569,293
Date of Construction	1985
Date Acquired	Jan. 23, 2015
Bloomingdale | Illinois
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 2,375,619
Initial Cost to Company, Land	810,000
Initial Cost to Company, Buildings and Improvements	3,856,874
Initial Cost to Company, Total	4,666,874
Cost Capitalized Subsequent to Acquisition	292,022
Gross Carrying Amount, Land	810,000
Gross Carrying Amount, Buildings and Improvements	4,148,896
Gross Carrying Amount, Total	4,958,896	[1]
Accumulated Depreciation	$ 808,741
Date of Construction	1987
Date Acquired	Feb. 19, 2015
Crestwood | Illinois
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 1,633,238
Initial Cost to Company, Land	250,000
Initial Cost to Company, Buildings and Improvements	2,096,875
Initial Cost to Company, Total	2,346,875
Cost Capitalized Subsequent to Acquisition	289,225
Gross Carrying Amount, Land	250,000
Gross Carrying Amount, Buildings and Improvements	2,386,100
Gross Carrying Amount, Total	2,636,100	[1]
Accumulated Depreciation	$ 500,125
Date of Construction	1987
Date Acquired	Jan. 23, 2015
Forestville | Maryland
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 3,464,444
Initial Cost to Company, Land	1,940,000
Initial Cost to Company, Buildings and Improvements	4,346,875
Initial Cost to Company, Total	6,286,875
Cost Capitalized Subsequent to Acquisition	916,799
Gross Carrying Amount, Land	1,940,000
Gross Carrying Amount, Buildings and Improvements	5,263,674
Gross Carrying Amount, Total	7,203,674	[1]
Accumulated Depreciation	$ 1,170,978
Date of Construction	1988
Date Acquired	Jan. 23, 2015
Warren | Property One
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 1,954,936
Initial Cost to Company, Land	230,000
Initial Cost to Company, Buildings and Improvements	2,966,875
Initial Cost to Company, Total	3,196,875
Cost Capitalized Subsequent to Acquisition	414,426
Gross Carrying Amount, Land	230,000
Gross Carrying Amount, Buildings and Improvements	3,381,301
Gross Carrying Amount, Total	3,611,301	[1]
Accumulated Depreciation	$ 661,863
Date of Construction	1996
Date Acquired	May 8, 2015
Warren | Michigan | Property Two
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 2,251,889
Initial Cost to Company, Land	240,000
Initial Cost to Company, Buildings and Improvements	3,066,875
Initial Cost to Company, Total	3,306,875
Cost Capitalized Subsequent to Acquisition	647,801
Gross Carrying Amount, Land	240,000
Gross Carrying Amount, Buildings and Improvements	3,714,676
Gross Carrying Amount, Total	3,954,676	[1]
Accumulated Depreciation	$ 751,865
Date of Construction	1987
Date Acquired	May 8, 2015
Sterling Heights | Michigan
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 2,301,381
Initial Cost to Company, Land	250,000
Initial Cost to Company, Buildings and Improvements	3,286,875
Initial Cost to Company, Total	3,536,875
Cost Capitalized Subsequent to Acquisition	687,046
Gross Carrying Amount, Land	250,000
Gross Carrying Amount, Buildings and Improvements	3,973,921
Gross Carrying Amount, Total	4,223,921	[1]
Accumulated Depreciation	$ 738,112
Date of Construction	1977
Date Acquired	May 21, 2015
Troy | Michigan
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 3,414,952
Initial Cost to Company, Land	240,000
Initial Cost to Company, Buildings and Improvements	4,176,875
Initial Cost to Company, Total	4,416,875
Cost Capitalized Subsequent to Acquisition	223,434
Gross Carrying Amount, Land	240,000
Gross Carrying Amount, Buildings and Improvements	4,400,309
Gross Carrying Amount, Total	4,640,309	[1]
Accumulated Depreciation	$ 838,838
Date of Construction	1988
Date Acquired	May 8, 2015
Troy | Ohio
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 2,988,229
Initial Cost to Company, Land	150,666
Initial Cost to Company, Buildings and Improvements	2,596,010
Initial Cost to Company, Total	2,746,676
Cost Capitalized Subsequent to Acquisition	56,417
Gross Carrying Amount, Land	150,666
Gross Carrying Amount, Buildings and Improvements	2,652,427
Gross Carrying Amount, Total	2,803,093	[1]
Accumulated Depreciation	$ 447,468
Date of Construction	2003
Date Acquired	Apr. 20, 2016
Beverly | New Jersey
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 1,385,778
Initial Cost to Company, Land	400,000
Initial Cost to Company, Buildings and Improvements	1,696,875
Initial Cost to Company, Total	2,096,875
Cost Capitalized Subsequent to Acquisition	280,370
Gross Carrying Amount, Land	400,000
Gross Carrying Amount, Buildings and Improvements	1,977,245
Gross Carrying Amount, Total	2,377,245	[1]
Accumulated Depreciation	$ 345,453
Date of Construction	1988
Date Acquired	May 28, 2015
Everett | Washington
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 2,722,063
Initial Cost to Company, Land	2,010,000
Initial Cost to Company, Buildings and Improvements	2,956,875
Initial Cost to Company, Total	4,966,875
Cost Capitalized Subsequent to Acquisition	592,662
Gross Carrying Amount, Land	2,010,000
Gross Carrying Amount, Buildings and Improvements	3,549,537
Gross Carrying Amount, Total	5,559,537	[1]
Accumulated Depreciation	$ 682,138
Date of Construction	1986
Date Acquired	Feb. 5, 2015
Foley | Alabama
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 4,132,587
Initial Cost to Company, Land	1,839,000
Initial Cost to Company, Buildings and Improvements	5,717,000
Initial Cost to Company, Total	7,556,000
Cost Capitalized Subsequent to Acquisition	597,640
Gross Carrying Amount, Land	1,839,000
Gross Carrying Amount, Buildings and Improvements	6,314,640
Gross Carrying Amount, Total	8,153,640	[1]
Accumulated Depreciation	$ 1,133,176
Date of Construction	1985/1996/2006
Date Acquired	Sep. 11, 2015
Tampa | Florida
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 1,633,238
Initial Cost to Company, Land	718,244
Initial Cost to Company, Buildings and Improvements	2,257,471
Initial Cost to Company, Total	2,975,715
Cost Capitalized Subsequent to Acquisition	544,520
Gross Carrying Amount, Land	718,244
Gross Carrying Amount, Buildings and Improvements	2,801,991
Gross Carrying Amount, Total	3,520,235	[1]
Accumulated Depreciation	$ 465,819
Date of Construction	1985
Date Acquired	Nov. 3, 2015
Boynton Beach | Florida
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 8,166,188
Initial Cost to Company, Land	1,983,491
Initial Cost to Company, Buildings and Improvements	15,232,817
Initial Cost to Company, Total	17,216,308
Cost Capitalized Subsequent to Acquisition	401,381
Gross Carrying Amount, Land	1,983,491
Gross Carrying Amount, Buildings and Improvements	15,634,198
Gross Carrying Amount, Total	17,617,689	[1]
Accumulated Depreciation	$ 1,903,280
Date of Construction	2004
Date Acquired	Jan. 7, 2016
Milton | Canada
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 5,941,133	[2]
Initial Cost to Company, Land	1,452,870	[2]
Initial Cost to Company, Buildings and Improvements	7,929,810	[2]
Initial Cost to Company, Total	9,382,680	[2]
Cost Capitalized Subsequent to Acquisition	935,627	[3]
Gross Carrying Amount, Land	1,551,187	[2]
Gross Carrying Amount, Buildings and Improvements	8,767,120	[2]
Gross Carrying Amount, Total	10,318,307	[1],[2]
Accumulated Depreciation	$ 1,024,658	[2]
Date of Construction	2006	[2]
Date Acquired	Feb. 11, 2016	[2]
Burlington | Canada | Property One
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 9,471,372	[2]
Initial Cost to Company, Land	3,293,267	[2]
Initial Cost to Company, Buildings and Improvements	10,278,861	[2]
Initial Cost to Company, Total	13,572,128	[2]
Cost Capitalized Subsequent to Acquisition	1,161,001	[3]
Gross Carrying Amount, Land	3,516,127	[2]
Gross Carrying Amount, Buildings and Improvements	11,217,002	[2]
Gross Carrying Amount, Total	14,733,129	[1],[2]
Accumulated Depreciation	$ 1,343,310	[2]
Date of Construction	2011	[2]
Date Acquired	Feb. 11, 2016	[2]
Burlington | Canada | Property Two
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 4,735,686	[2]
Initial Cost to Company, Land	2,944,035	[2]
Initial Cost to Company, Buildings and Improvements	5,125,839	[2]
Initial Cost to Company, Total	8,069,874	[2]
Cost Capitalized Subsequent to Acquisition	507,540	[3]
Gross Carrying Amount, Land	3,056,847	[2]
Gross Carrying Amount, Buildings and Improvements	5,520,567	[2]
Gross Carrying Amount, Total	8,577,414	[1],[2]
Accumulated Depreciation	$ 663,864	[2]
Date of Construction	2008	[2]
Date Acquired	Feb. 29, 2016	[2]
Oakville | Canada | Property One
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 6,543,857	[2]
Initial Cost to Company, Land	2,655,215	[2]
Initial Cost to Company, Buildings and Improvements	13,072,458	[2]
Initial Cost to Company, Total	15,727,673	[2]
Cost Capitalized Subsequent to Acquisition	2,989,499	[3]
Gross Carrying Amount, Land	2,834,896	[2]
Gross Carrying Amount, Buildings and Improvements	15,882,276	[2]
Gross Carrying Amount, Total	18,717,172	[1],[2]
Accumulated Depreciation	$ 1,933,514	[2]
Date of Construction	2016	[2]
Date Acquired	Feb. 11, 2016	[2]
Oakville | Canada | Property Two
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 7,663,201	[2]
Initial Cost to Company, Land	2,983,307	[2]
Initial Cost to Company, Buildings and Improvements	9,346,283	[2]
Initial Cost to Company, Total	12,329,590	[2]
Cost Capitalized Subsequent to Acquisition	707,360	[3]
Gross Carrying Amount, Land	3,097,623	[2]
Gross Carrying Amount, Buildings and Improvements	9,939,327	[2]
Gross Carrying Amount, Total	13,036,950	[1],[2]
Accumulated Depreciation	$ 1,218,853	[2]
Date of Construction	2004	[2]
Date Acquired	Feb. 29, 2016	[2]
Xenia | Ohio
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 2,705,559
Initial Cost to Company, Land	275,493
Initial Cost to Company, Buildings and Improvements	2,664,693
Initial Cost to Company, Total	2,940,186
Cost Capitalized Subsequent to Acquisition	26,364
Gross Carrying Amount, Land	275,493
Gross Carrying Amount, Buildings and Improvements	2,691,057
Gross Carrying Amount, Total	2,966,550	[1]
Accumulated Depreciation	$ 400,301
Date of Construction	2003
Date Acquired	Apr. 20, 2016
Sidney | Ohio
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 1,817,166
Initial Cost to Company, Land	255,246
Initial Cost to Company, Buildings and Improvements	1,806,349
Initial Cost to Company, Total	2,061,595
Cost Capitalized Subsequent to Acquisition	106,739
Gross Carrying Amount, Land	255,246
Gross Carrying Amount, Buildings and Improvements	1,913,088
Gross Carrying Amount, Total	2,168,334	[1]
Accumulated Depreciation	$ 415,302
Date of Construction	2003
Date Acquired	Apr. 20, 2016
Greenville | Ohio
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 1,897,929
Initial Cost to Company, Land	82,598
Initial Cost to Company, Buildings and Improvements	1,909,466
Initial Cost to Company, Total	1,992,064
Cost Capitalized Subsequent to Acquisition	48,898
Gross Carrying Amount, Land	82,598
Gross Carrying Amount, Buildings and Improvements	1,958,364
Gross Carrying Amount, Total	2,040,962	[1]
Accumulated Depreciation	$ 286,401
Date of Construction	2003
Date Acquired	Apr. 20, 2016
Washington Court House | Ohio
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 2,947,848
Initial Cost to Company, Land	255,456
Initial Cost to Company, Buildings and Improvements	1,882,203
Initial Cost to Company, Total	2,137,659
Cost Capitalized Subsequent to Acquisition	28,346
Gross Carrying Amount, Land	255,456
Gross Carrying Amount, Buildings and Improvements	1,910,549
Gross Carrying Amount, Total	2,166,005	[1]
Accumulated Depreciation	$ 290,615
Date of Construction	2003
Date Acquired	Apr. 20, 2016
Richmond | Indiana
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 2,988,229
Initial Cost to Company, Land	223,159
Initial Cost to Company, Buildings and Improvements	2,944,379
Initial Cost to Company, Total	3,167,538
Cost Capitalized Subsequent to Acquisition	23,738
Gross Carrying Amount, Land	223,159
Gross Carrying Amount, Buildings and Improvements	2,968,117
Gross Carrying Amount, Total	3,191,276	[1]
Accumulated Depreciation	$ 462,658
Date of Construction	2003
Date Acquired	Apr. 20, 2016
Connersville | Indiana
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 1,857,548
Initial Cost to Company, Land	155,533
Initial Cost to Company, Buildings and Improvements	1,652,290
Initial Cost to Company, Total	1,807,823
Cost Capitalized Subsequent to Acquisition	24,961
Gross Carrying Amount, Land	155,533
Gross Carrying Amount, Buildings and Improvements	1,677,251
Gross Carrying Amount, Total	1,832,784	[1]
Accumulated Depreciation	$ 263,158
Date of Construction	2003
Date Acquired	Apr. 20, 2016
Port St. Lucie | Florida | Property One
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 7,430,191
Initial Cost to Company, Land	2,589,781
Initial Cost to Company, Buildings and Improvements	6,339,578
Initial Cost to Company, Total	8,929,359
Cost Capitalized Subsequent to Acquisition	135,087
Gross Carrying Amount, Land	2,589,781
Gross Carrying Amount, Buildings and Improvements	6,474,665
Gross Carrying Amount, Total	9,064,446	[1]
Accumulated Depreciation	$ 845,185
Date of Construction	1999
Date Acquired	Apr. 29, 2016
Port St. Lucie | Florida | Property Two
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 7,264,947
Initial Cost to Company, Land	5,130,621
Initial Cost to Company, Buildings and Improvements	8,410,474
Initial Cost to Company, Total	13,541,095
Cost Capitalized Subsequent to Acquisition	151,777
Gross Carrying Amount, Land	5,130,621
Gross Carrying Amount, Buildings and Improvements	8,562,251
Gross Carrying Amount, Total	13,692,872	[1]
Accumulated Depreciation	$ 1,136,769
Date of Construction	2002
Date Acquired	Jun. 1, 2016
Sacramento | Canada
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 8,157,058
Initial Cost to Company, Land	1,205,209
Initial Cost to Company, Buildings and Improvements	6,616,767
Initial Cost to Company, Total	7,821,976
Cost Capitalized Subsequent to Acquisition	158,568
Gross Carrying Amount, Land	1,205,209
Gross Carrying Amount, Buildings and Improvements	6,775,335
Gross Carrying Amount, Total	7,980,544	[1]
Accumulated Depreciation	$ 800,959
Date of Construction	2006
Date Acquired	May 9, 2016
Oakland | Canada
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 13,325,887
Initial Cost to Company, Land	5,711,189
Initial Cost to Company, Buildings and Improvements	6,902,446
Initial Cost to Company, Total	12,613,635
Cost Capitalized Subsequent to Acquisition	82,123
Gross Carrying Amount, Land	5,711,189
Gross Carrying Amount, Buildings and Improvements	6,984,569
Gross Carrying Amount, Total	12,695,758	[1]
Accumulated Depreciation	$ 834,038
Date of Construction	1979
Date Acquired	May 18, 2016
Concord | Canada
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 32,628,233
Initial Cost to Company, Land	19,090,003
Initial Cost to Company, Buildings and Improvements	17,202,868
Initial Cost to Company, Total	36,292,871
Cost Capitalized Subsequent to Acquisition	144,116
Gross Carrying Amount, Land	19,090,003
Gross Carrying Amount, Buildings and Improvements	17,346,984
Gross Carrying Amount, Total	36,436,987	[1]
Accumulated Depreciation	$ 2,138,426
Date of Construction	1988/1998
Date Acquired	May 18, 2016
Pompano Beach | Florida
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 8,590,310
Initial Cost to Company, Land	3,947,715
Initial Cost to Company, Buildings and Improvements	16,656,002
Initial Cost to Company, Total	20,603,717
Cost Capitalized Subsequent to Acquisition	154,178
Gross Carrying Amount, Land	3,947,715
Gross Carrying Amount, Buildings and Improvements	16,810,180
Gross Carrying Amount, Total	20,757,895	[1]
Accumulated Depreciation	$ 1,797,481
Date of Construction	1979
Date Acquired	Jun. 1, 2016
Lake Worth | Florida
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 10,308,370
Initial Cost to Company, Land	12,108,208
Initial Cost to Company, Buildings and Improvements	10,804,173
Initial Cost to Company, Total	22,912,381
Cost Capitalized Subsequent to Acquisition	149,355
Gross Carrying Amount, Land	12,108,208
Gross Carrying Amount, Buildings and Improvements	10,953,528
Gross Carrying Amount, Total	23,061,736	[1]
Accumulated Depreciation	$ 1,626,503
Date of Construction	1998/2003
Date Acquired	Jun. 1, 2016
Jupiter | Florida
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 11,568,280
Initial Cost to Company, Land	16,029,881
Initial Cost to Company, Buildings and Improvements	10,556,833
Initial Cost to Company, Total	26,586,714
Cost Capitalized Subsequent to Acquisition	215,037
Gross Carrying Amount, Land	16,029,881
Gross Carrying Amount, Buildings and Improvements	10,771,870
Gross Carrying Amount, Total	26,801,751	[1]
Accumulated Depreciation	$ 1,330,037
Date of Construction	1992/2012
Date Acquired	Jun. 1, 2016
Royal Palm Beach | Florida
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 9,678,415
Initial Cost to Company, Land	11,425,394
Initial Cost to Company, Buildings and Improvements	13,275,322
Initial Cost to Company, Total	24,700,716
Cost Capitalized Subsequent to Acquisition	73,709
Gross Carrying Amount, Land	11,425,394
Gross Carrying Amount, Buildings and Improvements	13,349,031
Gross Carrying Amount, Total	24,774,425	[1]
Accumulated Depreciation	$ 1,871,748
Date of Construction	2001/2003
Date Acquired	Jun. 1, 2016
Wellington | Florida
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 14,456,568
Initial Cost to Company, Land	10,233,511
Initial Cost to Company, Buildings and Improvements	11,662,801
Initial Cost to Company, Total	21,896,312
Cost Capitalized Subsequent to Acquisition	65,191
Gross Carrying Amount, Land	10,233,511
Gross Carrying Amount, Buildings and Improvements	11,727,992
Gross Carrying Amount, Total	21,961,503	[1]
Accumulated Depreciation	$ 1,359,869
Date of Construction	2005
Date Acquired	Jun. 1, 2016
Doral | Florida
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 14,133,517
Initial Cost to Company, Land	11,335,658
Initial Cost to Company, Buildings and Improvements	11,485,045
Initial Cost to Company, Total	22,820,703
Cost Capitalized Subsequent to Acquisition	207,247
Gross Carrying Amount, Land	11,335,658
Gross Carrying Amount, Buildings and Improvements	11,692,292
Gross Carrying Amount, Total	23,027,950	[1]
Accumulated Depreciation	$ 1,371,867
Date of Construction	1998
Date Acquired	Jun. 1, 2016
Plantation | Florida
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 15,969,792
Initial Cost to Company, Land	12,989,079
Initial Cost to Company, Buildings and Improvements	19,224,919
Initial Cost to Company, Total	32,213,998
Cost Capitalized Subsequent to Acquisition	111,811
Gross Carrying Amount, Land	12,989,079
Gross Carrying Amount, Buildings and Improvements	19,336,730
Gross Carrying Amount, Total	32,325,809	[1]
Accumulated Depreciation	$ 2,245,241
Date of Construction	2002/2012
Date Acquired	Jun. 1, 2016
Naples | Florida
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 14,214,280
Initial Cost to Company, Land	11,789,085
Initial Cost to Company, Buildings and Improvements	12,771,305
Initial Cost to Company, Total	24,560,390
Cost Capitalized Subsequent to Acquisition	167,417
Gross Carrying Amount, Land	11,789,085
Gross Carrying Amount, Buildings and Improvements	12,938,722
Gross Carrying Amount, Total	24,727,807	[1]
Accumulated Depreciation	$ 1,476,192
Date of Construction	2002
Date Acquired	Jun. 1, 2016
Delray | Florida
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 11,854,625
Initial Cost to Company, Land	17,096,692
Initial Cost to Company, Buildings and Improvements	12,983,627
Initial Cost to Company, Total	30,080,319
Cost Capitalized Subsequent to Acquisition	173,022
Gross Carrying Amount, Land	17,096,692
Gross Carrying Amount, Buildings and Improvements	13,156,649
Gross Carrying Amount, Total	30,253,341	[1]
Accumulated Depreciation	$ 1,541,643
Date of Construction	2003
Date Acquired	Jun. 1, 2016
Baltimore | Maryland
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 16,293,926
Initial Cost to Company, Land	3,897,872
Initial Cost to Company, Buildings and Improvements	22,427,843
Initial Cost to Company, Total	26,325,715
Cost Capitalized Subsequent to Acquisition	276,571
Gross Carrying Amount, Land	3,897,872
Gross Carrying Amount, Buildings and Improvements	22,704,414
Gross Carrying Amount, Total	26,602,286	[1]
Accumulated Depreciation	$ 2,739,385
Date of Construction	1990/2014
Date Acquired	Jun. 1, 2016
Sonoma | Canada
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 6,283,197
Initial Cost to Company, Land	3,468,153
Initial Cost to Company, Buildings and Improvements	3,679,939
Initial Cost to Company, Total	7,148,092
Cost Capitalized Subsequent to Acquisition	51,077
Gross Carrying Amount, Land	3,468,153
Gross Carrying Amount, Buildings and Improvements	3,731,016
Gross Carrying Amount, Total	7,199,169	[1]
Accumulated Depreciation	$ 472,501
Date of Construction	1984
Date Acquired	Jun. 14, 2016
Las Vegas I | Nevada | Property One
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 10,210,195
Initial Cost to Company, Land	2,391,220
Initial Cost to Company, Buildings and Improvements	11,117,892
Initial Cost to Company, Total	13,509,112
Cost Capitalized Subsequent to Acquisition	144,928
Gross Carrying Amount, Land	2,391,220
Gross Carrying Amount, Buildings and Improvements	11,262,820
Gross Carrying Amount, Total	13,654,040	[1]
Accumulated Depreciation	$ 1,179,359
Date of Construction	2002
Date Acquired	Jul. 28, 2016
Las Vegas II | Nevada | Property Two
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 10,471,995
Initial Cost to Company, Land	3,840,088
Initial Cost to Company, Buildings and Improvements	9,916,937
Initial Cost to Company, Total	13,757,025
Cost Capitalized Subsequent to Acquisition	111,618
Gross Carrying Amount, Land	3,840,088
Gross Carrying Amount, Buildings and Improvements	10,028,555
Gross Carrying Amount, Total	13,868,643	[1]
Accumulated Depreciation	$ 1,108,709
Date of Construction	2000
Date Acquired	Sep. 23, 2016
Las Vegas III | Nevada | Property Three
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 6,544,997
Initial Cost to Company, Land	2,565,579
Initial Cost to Company, Buildings and Improvements	6,338,944
Initial Cost to Company, Total	8,904,523
Cost Capitalized Subsequent to Acquisition	169,906
Gross Carrying Amount, Land	2,565,579
Gross Carrying Amount, Buildings and Improvements	6,508,850
Gross Carrying Amount, Total	9,074,429	[1]
Accumulated Depreciation	$ 737,188
Date of Construction	1989
Date Acquired	Sep. 27, 2016
Asheville I | North Carolina | Property One
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 7,113,097
Initial Cost to Company, Land	3,619,676
Initial Cost to Company, Buildings and Improvements	11,173,603
Initial Cost to Company, Total	14,793,279
Cost Capitalized Subsequent to Acquisition	288,193
Gross Carrying Amount, Land	3,619,676
Gross Carrying Amount, Buildings and Improvements	11,461,796
Gross Carrying Amount, Total	15,081,472	[1]
Accumulated Depreciation	$ 1,212,018
Date of Construction	1988/2005/2015
Date Acquired	Dec. 30, 2016
Asheville II | North Carolina | Property Two
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 3,236,212
Initial Cost to Company, Land	1,764,969
Initial Cost to Company, Buildings and Improvements	3,107,311
Initial Cost to Company, Total	4,872,280
Cost Capitalized Subsequent to Acquisition	78,177
Gross Carrying Amount, Land	1,764,969
Gross Carrying Amount, Buildings and Improvements	3,185,488
Gross Carrying Amount, Total	4,950,457	[1]
Accumulated Depreciation	$ 366,004
Date of Construction	1984
Date Acquired	Dec. 30, 2016
Hendersonville I | North Carolina | Property One
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 2,234,137
Initial Cost to Company, Land	1,081,547
Initial Cost to Company, Buildings and Improvements	3,441,204
Initial Cost to Company, Total	4,522,751
Cost Capitalized Subsequent to Acquisition	105,475
Gross Carrying Amount, Land	1,081,547
Gross Carrying Amount, Buildings and Improvements	3,546,679
Gross Carrying Amount, Total	4,628,226	[1]
Accumulated Depreciation	$ 378,487
Date of Construction	1982
Date Acquired	Dec. 30, 2016
Asheville III | North Carolina | Property Three
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 4,657,189
Initial Cost to Company, Land	5,096,833
Initial Cost to Company, Buildings and Improvements	4,620,013
Initial Cost to Company, Total	9,716,846
Cost Capitalized Subsequent to Acquisition	159,066
Gross Carrying Amount, Land	5,096,833
Gross Carrying Amount, Buildings and Improvements	4,779,079
Gross Carrying Amount, Total	9,875,912	[1]
Accumulated Depreciation	$ 558,244
Date of Construction	1991/2002
Date Acquired	Dec. 30, 2016
Arden | North Carolina
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 6,529,921
Initial Cost to Company, Land	1,790,118
Initial Cost to Company, Buildings and Improvements	10,265,741
Initial Cost to Company, Total	12,055,859
Cost Capitalized Subsequent to Acquisition	199,741
Gross Carrying Amount, Land	1,790,118
Gross Carrying Amount, Buildings and Improvements	10,465,482
Gross Carrying Amount, Total	12,255,600	[1]
Accumulated Depreciation	$ 994,253
Date of Construction	1973
Date Acquired	Dec. 30, 2016
Asheville IV | North Carolina
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 4,394,350
Initial Cost to Company, Land	4,558,139
Initial Cost to Company, Buildings and Improvements	4,455,118
Initial Cost to Company, Total	9,013,257
Cost Capitalized Subsequent to Acquisition	86,312
Gross Carrying Amount, Land	4,558,139
Gross Carrying Amount, Buildings and Improvements	4,541,430
Gross Carrying Amount, Total	9,099,569	[1]
Accumulated Depreciation	$ 544,682
Date of Construction	1985/1986/2005
Date Acquired	Dec. 30, 2016
Asheville V | North Carolina
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 5,051,449
Initial Cost to Company, Land	2,414,680
Initial Cost to Company, Buildings and Improvements	7,826,417
Initial Cost to Company, Total	10,241,097
Cost Capitalized Subsequent to Acquisition	124,678
Gross Carrying Amount, Land	2,414,680
Gross Carrying Amount, Buildings and Improvements	7,951,095
Gross Carrying Amount, Total	10,365,775	[1]
Accumulated Depreciation	$ 854,206
Date of Construction	1978/2009/2014
Date Acquired	Dec. 30, 2016
Asheville VI | North Carolina
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 3,474,411
Initial Cost to Company, Land	1,306,240
Initial Cost to Company, Buildings and Improvements	5,121,332
Initial Cost to Company, Total	6,427,572
Cost Capitalized Subsequent to Acquisition	105,933
Gross Carrying Amount, Land	1,306,240
Gross Carrying Amount, Buildings and Improvements	5,227,265
Gross Carrying Amount, Total	6,533,505	[1]
Accumulated Depreciation	$ 513,159
Date of Construction	2004
Date Acquired	Dec. 30, 2016
Asheville VIII | North Carolina
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 4,517,556
Initial Cost to Company, Land	1,764,965
Initial Cost to Company, Buildings and Improvements	6,162,855
Initial Cost to Company, Total	7,927,820
Cost Capitalized Subsequent to Acquisition	143,977
Gross Carrying Amount, Land	1,764,965
Gross Carrying Amount, Buildings and Improvements	6,306,832
Gross Carrying Amount, Total	8,071,797	[1]
Accumulated Depreciation	$ 693,448
Date of Construction	1968/2002
Date Acquired	Dec. 30, 2016
Hendersonville II | North Carolina | Property Two
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 4,254,715
Initial Cost to Company, Land	2,597,584
Initial Cost to Company, Buildings and Improvements	5,037,350
Initial Cost to Company, Total	7,634,934
Cost Capitalized Subsequent to Acquisition	160,072
Gross Carrying Amount, Land	2,597,584
Gross Carrying Amount, Buildings and Improvements	5,197,422
Gross Carrying Amount, Total	7,795,006	[1]
Accumulated Depreciation	$ 657,926
Date of Construction	1989/2003
Date Acquired	Dec. 30, 2016
Asheville VII | North Carolina
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 1,585,252
Initial Cost to Company, Land	782,457
Initial Cost to Company, Buildings and Improvements	2,139,791
Initial Cost to Company, Total	2,922,248
Cost Capitalized Subsequent to Acquisition	58,418
Gross Carrying Amount, Land	782,457
Gross Carrying Amount, Buildings and Improvements	2,198,209
Gross Carrying Amount, Total	2,980,666	[1]
Accumulated Depreciation	$ 253,424
Date of Construction	1999
Date Acquired	Dec. 30, 2016
Sweeten Creek Land | North Carolina
Real Estate And Accumulated Depreciation [Line Items]
Initial Cost to Company, Land	$ 348,480
Initial Cost to Company, Total	348,480
Gross Carrying Amount, Land	348,480
Gross Carrying Amount, Total	$ 348,480	[1]
Date of Construction	N/A
Date Acquired	Dec. 30, 2016
Highland Center Land | North Carolina
Real Estate And Accumulated Depreciation [Line Items]
Initial Cost to Company, Land	$ 50,000
Initial Cost to Company, Total	50,000
Gross Carrying Amount, Land	50,000
Gross Carrying Amount, Total	$ 50,000	[1]
Date of Construction	N/A
Date Acquired	Dec. 30, 2016
Aurora II | Colorado | Property Two
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 8,560,873
Initial Cost to Company, Land	1,584,664
Initial Cost to Company, Buildings and Improvements	8,196,091
Initial Cost to Company, Total	9,780,755
Cost Capitalized Subsequent to Acquisition	96,060
Gross Carrying Amount, Land	1,584,664
Gross Carrying Amount, Buildings and Improvements	8,292,151
Gross Carrying Amount, Total	9,876,815	[1]
Accumulated Depreciation	$ 962,350
Date of Construction	2012
Date Acquired	Jan. 11, 2017
Dufferin | Canada
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 18,426,124	[2]
Initial Cost to Company, Land	6,258,511	[2]
Initial Cost to Company, Buildings and Improvements	16,287,332	[2]
Initial Cost to Company, Total	22,545,843	[2]
Cost Capitalized Subsequent to Acquisition	219,635	[2],[3]
Gross Carrying Amount, Land	6,283,048	[2]
Gross Carrying Amount, Buildings and Improvements	16,482,430	[2]
Gross Carrying Amount, Total	22,765,478	[1],[2]
Accumulated Depreciation	$ 1,539,550	[2]
Date of Construction	2015	[2]
Date Acquired	Feb. 1, 2017	[2]
Mavis | Canada
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 12,743,301	[2]
Initial Cost to Company, Land	4,657,233	[2]
Initial Cost to Company, Buildings and Improvements	14,493,508	[2]
Initial Cost to Company, Total	19,150,741	[2]
Cost Capitalized Subsequent to Acquisition	155,843	[2],[3]
Gross Carrying Amount, Land	4,675,492	[2]
Gross Carrying Amount, Buildings and Improvements	14,631,092	[2]
Gross Carrying Amount, Total	19,306,584	[1],[2]
Accumulated Depreciation	$ 1,348,393	[2]
Date of Construction	2013	[2]
Date Acquired	Feb. 1, 2017	[2]
Brewster | Canada
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 9,385,269	[2]
Initial Cost to Company, Land	4,136,329	[2]
Initial Cost to Company, Buildings and Improvements	9,527,410	[2]
Initial Cost to Company, Total	13,663,739	[2]
Cost Capitalized Subsequent to Acquisition	107,094	[2],[3]
Gross Carrying Amount, Land	4,152,546	[2]
Gross Carrying Amount, Buildings and Improvements	9,618,287	[2]
Gross Carrying Amount, Total	13,770,833	[1],[2]
Accumulated Depreciation	$ 897,554	[2]
Date of Construction	2013	[2]
Date Acquired	Feb. 1, 2017	[2]
Granite | Canada
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 6,199,444	[2]
Initial Cost to Company, Land	3,126,446	[2]
Initial Cost to Company, Buildings and Improvements	8,701,429	[2]
Initial Cost to Company, Total	11,827,875	[2]
Cost Capitalized Subsequent to Acquisition	109,913	[2],[3]
Gross Carrying Amount, Land	3,138,703	[2]
Gross Carrying Amount, Buildings and Improvements	8,799,085	[2]
Gross Carrying Amount, Total	11,937,788	[1],[2]
Accumulated Depreciation	$ 782,623	[2]
Date of Construction	1998/2016	[2]
Date Acquired	Feb. 1, 2017	[2]
Centennial | Canada
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 4,391,273	[2]
Initial Cost to Company, Land	1,714,644	[2]
Initial Cost to Company, Buildings and Improvements	11,428,538	[2]
Initial Cost to Company, Total	13,143,182	[2]
Cost Capitalized Subsequent to Acquisition	170,347	[2],[3]
Gross Carrying Amount, Land	1,721,366	[2]
Gross Carrying Amount, Buildings and Improvements	11,592,163	[2]
Gross Carrying Amount, Total	13,313,529	[1],[2]
Accumulated Depreciation	$ 1,013,267	[2]
Date of Construction	2016/2017	[2]
Date Acquired	Feb. 1, 2017	[2]
Ft Pierce | Florida
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 6,479,547
Initial Cost to Company, Land	1,152,931
Initial Cost to Company, Buildings and Improvements	12,398,306
Initial Cost to Company, Total	13,551,237
Cost Capitalized Subsequent to Acquisition	22,461
Gross Carrying Amount, Land	1,152,931
Gross Carrying Amount, Buildings and Improvements	12,420,767
Gross Carrying Amount, Total	13,573,698	[1]
Accumulated Depreciation	$ 358,952
Date of Construction	2008
Date Acquired	Jan. 24, 2019
Russell Blvd, Las Vegas II | Nevada
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 13,002,835
Initial Cost to Company, Land	3,433,634
Initial Cost to Company, Buildings and Improvements	15,449,497
Initial Cost to Company, Total	18,883,131
Cost Capitalized Subsequent to Acquisition	6,640
Gross Carrying Amount, Land	3,433,634
Gross Carrying Amount, Buildings and Improvements	15,456,137
Gross Carrying Amount, Total	18,889,771	[1]
Accumulated Depreciation	$ 562,583
Date of Construction	1996
Date Acquired	Jan. 24, 2019
Jones Blvd, Las Vegas I | Nevada
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 10,902,999
Initial Cost to Company, Land	1,975,283
Initial Cost to Company, Buildings and Improvements	12,565,410
Initial Cost to Company, Total	14,540,693
Cost Capitalized Subsequent to Acquisition	35,094
Gross Carrying Amount, Land	1,975,283
Gross Carrying Amount, Buildings and Improvements	12,600,504
Gross Carrying Amount, Total	14,575,787	[1]
Accumulated Depreciation	$ 362,807
Date of Construction	1999
Date Acquired	Jan. 24, 2019
Airport Rd, Colorado Springs | Colorado
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 3,664,395
Initial Cost to Company, Land	870,373
Initial Cost to Company, Buildings and Improvements	7,877,813
Initial Cost to Company, Total	8,748,186
Cost Capitalized Subsequent to Acquisition	97,297
Gross Carrying Amount, Land	870,373
Gross Carrying Amount, Buildings and Improvements	7,975,110
Gross Carrying Amount, Total	8,845,483	[1]
Accumulated Depreciation	$ 242,859
Date of Construction	1983
Date Acquired	Jan. 24, 2019
Riverside | Canada
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 6,461,036
Initial Cost to Company, Land	1,259,685
Initial Cost to Company, Buildings and Improvements	6,995,794
Initial Cost to Company, Total	8,255,479
Cost Capitalized Subsequent to Acquisition	102,225
Gross Carrying Amount, Land	1,259,685
Gross Carrying Amount, Buildings and Improvements	7,098,019
Gross Carrying Amount, Total	8,357,704	[1]
Accumulated Depreciation	$ 223,795
Date of Construction	1980
Date Acquired	Jan. 24, 2019
Stockton | Canada
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 5,653,407
Initial Cost to Company, Land	783,938
Initial Cost to Company, Buildings and Improvements	7,706,492
Initial Cost to Company, Total	8,490,430
Cost Capitalized Subsequent to Acquisition	1,232
Gross Carrying Amount, Land	783,938
Gross Carrying Amount, Buildings and Improvements	7,707,724
Gross Carrying Amount, Total	8,491,662	[1]
Accumulated Depreciation	$ 243,952
Date of Construction	1984
Date Acquired	Jan. 24, 2019
Azusa | Canada
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 9,530,028
Initial Cost to Company, Land	4,384,861
Initial Cost to Company, Buildings and Improvements	9,153,677
Initial Cost to Company, Total	13,538,538
Cost Capitalized Subsequent to Acquisition	135,589
Gross Carrying Amount, Land	4,384,861
Gross Carrying Amount, Buildings and Improvements	9,289,266
Gross Carrying Amount, Total	13,674,127	[1]
Accumulated Depreciation	$ 276,663
Date of Construction	1986
Date Acquired	Jan. 24, 2019
Romeoville | Illinois
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 3,836,240
Initial Cost to Company, Land	964,701
Initial Cost to Company, Buildings and Improvements	5,755,146
Initial Cost to Company, Total	6,719,847
Cost Capitalized Subsequent to Acquisition	48,208
Gross Carrying Amount, Land	964,701
Gross Carrying Amount, Buildings and Improvements	5,803,354
Gross Carrying Amount, Total	6,768,055	[1]
Accumulated Depreciation	$ 189,896
Date of Construction	1986
Date Acquired	Jan. 24, 2019
Elgin | Illinois
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 2,665,177
Initial Cost to Company, Land	1,162,197
Initial Cost to Company, Buildings and Improvements	2,895,052
Initial Cost to Company, Total	4,057,249
Cost Capitalized Subsequent to Acquisition	41,578
Gross Carrying Amount, Land	1,162,197
Gross Carrying Amount, Buildings and Improvements	2,936,630
Gross Carrying Amount, Total	4,098,827	[1]
Accumulated Depreciation	$ 121,271
Date of Construction	1986
Date Acquired	Jan. 24, 2019
San Antonio I | Texas | Property One
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 9,126,214
Initial Cost to Company, Land	1,602,740
Initial Cost to Company, Buildings and Improvements	9,196,093
Initial Cost to Company, Total	10,798,833
Cost Capitalized Subsequent to Acquisition	88,535
Gross Carrying Amount, Land	1,602,740
Gross Carrying Amount, Buildings and Improvements	9,284,628
Gross Carrying Amount, Total	10,887,368	[1]
Accumulated Depreciation	$ 279,444
Date of Construction	1998
Date Acquired	Jan. 24, 2019
Kingwood | Texas
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 6,299,510
Initial Cost to Company, Land	1,016,291
Initial Cost to Company, Buildings and Improvements	9,358,519
Initial Cost to Company, Total	10,374,810
Cost Capitalized Subsequent to Acquisition	64,973
Gross Carrying Amount, Land	1,016,291
Gross Carrying Amount, Buildings and Improvements	9,423,492
Gross Carrying Amount, Total	10,439,783	[1]
Accumulated Depreciation	$ 302,752
Date of Construction	2001
Date Acquired	Jan. 24, 2019
Aurora | Colorado
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 3,942,344
Initial Cost to Company, Land	1,678,141
Initial Cost to Company, Buildings and Improvements	5,958,219
Initial Cost to Company, Total	7,636,360
Cost Capitalized Subsequent to Acquisition	12,582
Gross Carrying Amount, Land	1,678,141
Gross Carrying Amount, Buildings and Improvements	5,970,801
Gross Carrying Amount, Total	7,648,942	[1]
Accumulated Depreciation	$ 243,322
Date of Construction	2015
Date Acquired	Jan. 24, 2019
San Antonio II | Texas | Property Two
Real Estate And Accumulated Depreciation [Line Items]
Initial Cost to Company, Land	$ 3,109,187
Initial Cost to Company, Buildings and Improvements	8,579,806
Initial Cost to Company, Total	$ 11,688,993
Date of Construction	2004
Date Acquired	Jan. 24, 2019
Stoney Creek I | Ontario | Property One
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 5,591,950
Initial Cost to Company, Land	2,363,127
Initial Cost to Company, Buildings and Improvements	8,154,202
Initial Cost to Company, Total	10,517,329
Cost Capitalized Subsequent to Acquisition	321,104	[3]
Gross Carrying Amount, Land	2,423,704
Gross Carrying Amount, Buildings and Improvements	8,414,729
Gross Carrying Amount, Total	10,838,433	[1]
Accumulated Depreciation	$ 261,845
Date of Construction	N/A
Date Acquired	Jan. 24, 2019
Torbarrie | Ontario
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 5,936,996
Initial Cost to Company, Land	2,714,051
Initial Cost to Company, Total	2,714,051
Gross Carrying Amount, Land	2,783,623
Gross Carrying Amount, Total	$ 2,783,623	[1]
Date of Construction	1980
Date Acquired	Jan. 24, 2019
Baseline | Arizona
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 5,882,318
Initial Cost to Company, Land	1,307,289
Initial Cost to Company, Buildings and Improvements	11,385,380
Initial Cost to Company, Total	12,692,669
Gross Carrying Amount, Land	1,307,289
Gross Carrying Amount, Buildings and Improvements	11,385,380
Gross Carrying Amount, Total	12,692,669	[1]
Accumulated Depreciation	$ 362,892
Date of Construction	2016
Date Acquired	Jan. 24, 2019
3173 Sweeten Creek Rd, Asheville | North Carolina
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 3,636,033
Initial Cost to Company, Land	1,036,164
Initial Cost to Company, Buildings and Improvements	8,764,558
Initial Cost to Company, Total	9,800,722
Cost Capitalized Subsequent to Acquisition	1,048,068
Gross Carrying Amount, Land	1,036,164
Gross Carrying Amount, Buildings and Improvements	9,812,626
Gross Carrying Amount, Total	10,848,790	[1]
Accumulated Depreciation	$ 276,861
Date of Construction	1982
Date Acquired	Jan. 24, 2019
Elk Grove | Illinois
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 3,670,067
Initial Cost to Company, Land	2,384,166
Initial Cost to Company, Buildings and Improvements	6,000,071
Initial Cost to Company, Total	8,384,237
Cost Capitalized Subsequent to Acquisition	26,971
Gross Carrying Amount, Land	2,384,166
Gross Carrying Amount, Buildings and Improvements	6,027,042
Gross Carrying Amount, Total	8,411,208	[1]
Accumulated Depreciation	$ 189,136
Date of Construction	2016
Date Acquired	Jan. 24, 2019
Garden Grove | Canada
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 10,885,408
Initial Cost to Company, Land	8,076,202
Initial Cost to Company, Buildings and Improvements	13,152,494
Initial Cost to Company, Total	21,228,696
Cost Capitalized Subsequent to Acquisition	68,311
Gross Carrying Amount, Land	8,076,202
Gross Carrying Amount, Buildings and Improvements	13,220,805
Gross Carrying Amount, Total	21,297,007	[1]
Accumulated Depreciation	$ 405,382
Date of Construction	2017
Date Acquired	Jan. 24, 2019
Deaverview Rd, Asheville | North Carolina
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 2,830,546
Initial Cost to Company, Land	1,449,001
Initial Cost to Company, Buildings and Improvements	4,412,039
Initial Cost to Company, Total	5,861,040
Cost Capitalized Subsequent to Acquisition	121,594
Gross Carrying Amount, Land	1,449,001
Gross Carrying Amount, Buildings and Improvements	4,533,633
Gross Carrying Amount, Total	5,982,634	[1]
Accumulated Depreciation	$ 149,150
Date of Construction	1992
Date Acquired	Jan. 24, 2019
Highland Center Blvd, Asheville | North Carolina
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 3,267,324
Initial Cost to Company, Land	1,763,875
Initial Cost to Company, Buildings and Improvements	4,823,116
Initial Cost to Company, Total	6,586,991
Cost Capitalized Subsequent to Acquisition	16,000
Gross Carrying Amount, Land	1,763,875
Gross Carrying Amount, Buildings and Improvements	4,839,116
Gross Carrying Amount, Total	6,602,991	[1]
Accumulated Depreciation	$ 156,742
Date of Construction	1994
Date Acquired	Jan. 24, 2019
Sarasota | Florida
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 3,687,085
Initial Cost to Company, Land	1,084,165
Initial Cost to Company, Buildings and Improvements	7,359,913
Initial Cost to Company, Total	8,444,078
Cost Capitalized Subsequent to Acquisition	4,123
Gross Carrying Amount, Land	1,084,165
Gross Carrying Amount, Buildings and Improvements	7,364,036
Gross Carrying Amount, Total	8,448,201	[1]
Accumulated Depreciation	$ 214,523
Date of Construction	2017
Date Acquired	Jan. 24, 2019
Mount Pleasant | South Carolina
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 3,528,256
Initial Cost to Company, Land	1,054,553
Initial Cost to Company, Buildings and Improvements	5,678,794
Initial Cost to Company, Total	6,733,347
Cost Capitalized Subsequent to Acquisition	9,916
Gross Carrying Amount, Land	1,054,553
Gross Carrying Amount, Buildings and Improvements	5,688,710
Gross Carrying Amount, Total	6,743,263	[1]
Accumulated Depreciation	$ 167,246
Date of Construction	2016
Date Acquired	Jan. 24, 2019
Nantucket
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 25,198,238
Initial Cost to Company, Land	5,854,837
Initial Cost to Company, Buildings and Improvements	33,210,517
Initial Cost to Company, Total	39,065,354
Cost Capitalized Subsequent to Acquisition	49,887
Gross Carrying Amount, Land	5,854,837
Gross Carrying Amount, Buildings and Improvements	33,260,404
Gross Carrying Amount, Total	39,115,241	[1]
Accumulated Depreciation	$ 945,522
Date of Construction	2002
Date Acquired	Jan. 24, 2019
Pembroke Pines | Florida
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 8,559,709
Initial Cost to Company, Land	3,146,970
Initial Cost to Company, Buildings and Improvements	14,296,167
Initial Cost to Company, Total	17,443,137
Cost Capitalized Subsequent to Acquisition	6,192
Gross Carrying Amount, Land	3,146,970
Gross Carrying Amount, Buildings and Improvements	14,302,359
Gross Carrying Amount, Total	17,449,329	[1]
Accumulated Depreciation	$ 431,009
Date of Construction	2018
Date Acquired	Jan. 24, 2019
Riverview | Florida
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 4,674,089
Initial Cost to Company, Land	1,593,082
Initial Cost to Company, Buildings and Improvements	7,102,271
Initial Cost to Company, Total	8,695,353
Cost Capitalized Subsequent to Acquisition	9,552
Gross Carrying Amount, Land	1,593,082
Gross Carrying Amount, Buildings and Improvements	7,111,823
Gross Carrying Amount, Total	8,704,905	[1]
Accumulated Depreciation	$ 228,810
Date of Construction	2018
Date Acquired	Jan. 24, 2019
Eastlake | Canada
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 10,193,371
Initial Cost to Company, Land	2,120,104
Initial Cost to Company, Buildings and Improvements	15,417,746
Initial Cost to Company, Total	17,537,850
Cost Capitalized Subsequent to Acquisition	5,411
Gross Carrying Amount, Land	2,120,104
Gross Carrying Amount, Buildings and Improvements	15,423,157
Gross Carrying Amount, Total	17,543,261	[1]
Accumulated Depreciation	$ 430,220
Date of Construction	2018
Date Acquired	Jan. 24, 2019
McKinney | Texas
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 5,990,094
Initial Cost to Company, Land	2,177,186
Initial Cost to Company, Buildings and Improvements	9,320,876
Initial Cost to Company, Total	11,498,062
Cost Capitalized Subsequent to Acquisition	4,202
Gross Carrying Amount, Land	2,177,186
Gross Carrying Amount, Buildings and Improvements	9,325,078
Gross Carrying Amount, Total	11,502,264	[1]
Accumulated Depreciation	$ 274,864
Date of Construction	2016
Date Acquired	Jan. 24, 2019
Hualapai Way, Las Vegas | Nevada
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 5,428,523
Initial Cost to Company, Land	742,839
Initial Cost to Company, Buildings and Improvements	9,018,717
Initial Cost to Company, Total	9,761,556
Cost Capitalized Subsequent to Acquisition	3,775
Gross Carrying Amount, Land	742,839
Gross Carrying Amount, Buildings and Improvements	9,022,492
Gross Carrying Amount, Total	9,765,331	[1]
Accumulated Depreciation	$ 264,977
Date of Construction	2018
Date Acquired	Jan. 24, 2019
Gilbert | Arizona
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 5,672,438
Initial Cost to Company, Land	1,379,687
Initial Cost to Company, Buildings and Improvements	9,021,255
Initial Cost to Company, Total	10,400,942
Cost Capitalized Subsequent to Acquisition	138,470
Gross Carrying Amount, Land	1,037,750
Gross Carrying Amount, Buildings and Improvements	9,501,662
Gross Carrying Amount, Total	10,539,412	[1]
Accumulated Depreciation	$ 145,982
Date of Construction	2019
Date Acquired	Jul. 11, 2019
Corporate Office | California
Real Estate And Accumulated Depreciation [Line Items]
Encumbrances	$ 4,179,994
Initial Cost to Company, Land	975,000
Initial Cost to Company, Buildings and Improvements	5,525,000
Initial Cost to Company, Total	6,500,000
Gross Carrying Amount, Land	975,000
Gross Carrying Amount, Buildings and Improvements	5,525,000
Gross Carrying Amount, Total	6,500,000	[1]
Accumulated Depreciation	$ 75,399
Date of Construction	2018
Date Acquired	Jan. 24, 2019
[1]	The aggregate cost of real estate for United States federal income tax purposes is approximately $1,220,069,468.
[2]	This property is located in Ontario, Canada.
[3]	The change in cost at these self storage facilities are the net of the impact of foreign exchange rate changes and any actual additions.

Schedule III Real Estate Asse_2

Schedule III Real Estate Asset and Accumulated Depreciation (Parenthetical) (Detail)	Dec. 31, 2019USD ($)
United States
Real Estate And Accumulated Depreciation [Line Items]
Aggregate cost of real estate for federal income tax purposes	$ 1,220,069,468

Schedule III Summary of Activit

Schedule III Summary of Activity in Real Estate Facilities (Detail) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Real estate facilities
Real estate facilities, Balance at beginning of year	$ 1,173,825,368	$ 820,296,026
Facility acquisitions		351,070,238
Impact of foreign exchange rate changes	(4,145,778)	6,582,603	$ (11,915,703)
Improvements and additions	7,155,135	7,565,494	2,532,252
Asset disposals		(11,688,993)
Real estate facilities, Balance at end of year	1,191,037,320	1,173,825,368	820,296,026
Accumulated depreciation
Accumulated depreciation, beginning balance	(83,692,491)	(54,264,685)	(34,686,973)
Asset disposals		202,416
Depreciation expense	(23,136,367)	(29,188,668)	(20,134,068)
Impact of foreign exchange rate changes	272,635	(441,554)	556,356
Accumulated depreciation, ending balance	(106,556,223)	(83,692,491)	(54,264,685)
Construction in process
Construction in process, Balance at beginning of year	12,237,722	130,383
Net additions and assets placed into service		12,107,339
Construction in process, Balance at end of year	1,591,793	12,237,722	130,383
Real estate facilities, net	$ 1,086,072,890	$ 1,102,370,599	$ 766,161,724