Presidio Property Trust (SQFT) 10-Q 12 Nov 21 2021 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2021	Nov. 11, 2021
Document Information [Line Items]
Entity Central Index Key	0001080657
Entity Registrant Name	Presidio Property Trust, Inc.
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2021
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
Document Transition Report	false
Entity File Number	001-34049
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	33-0841255
Entity Address, Address Line One	4995 Murphy Canyon Road, Suite 300
Entity Address, City or Town	San Diego
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	92123
City Area Code	760
Local Phone Number	471-8536
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		11,490,230
Series D Preferred Stock [Member]
Document Information [Line Items]
Title of 12(b) Security	9.375% Series D Cumulative Redeemable Perpetual Preferred Stock $0.01 par value per share
Trading Symbol	SQFTP
Security Exchange Name	NASDAQ
Common Class A [Member]
Document Information [Line Items]
Title of 12(b) Security	Series A Common Stock, $0.01 par value per share
Trading Symbol	SQFT
Security Exchange Name	NASDAQ

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Real estate assets and lease intangibles:
Land	$ 18,082,521	$ 18,827,000
Buildings and improvements	110,786,670	115,409,423
Tenant improvements	12,466,083	11,960,018
Lease intangibles	4,110,139	4,110,139
Real estate assets and lease intangibles held for investment, cost	145,445,413	150,306,580
Accumulated depreciation and amortization	(29,564,702)	(26,551,789)
Real estate assets and lease intangibles held for investment, net	115,880,711	123,754,791
Real estate assets held for sale, net	10,006,947	42,499,176
Real estate assets, net	125,887,658	166,253,967
Cash, cash equivalents and restricted cash	27,816,296	11,540,917
Deferred leasing costs, net	1,258,134	1,927,951
Goodwill	2,423,000	2,423,000
Other assets, net	4,449,538	3,422,781
TOTAL ASSETS	161,834,626	185,568,616
Liabilities:
Mortgage notes payable, net	86,061,131	94,664,266
Mortgage notes payable related to properties held for sale, net	194,549	25,365,430
Mortgage notes payable, total net	86,255,680	120,029,696
Note payable, net		7,500,086
Accounts payable and accrued liabilities	4,704,493	5,126,199
Accrued real estate taxes	1,508,006	2,548,686
Dividends payable preferred stock	179,685	0
Lease liability, net	82,439	102,323
Below-market leases, net	86,852	139,045
Total liabilities	92,817,155	135,446,035
Commitments and contingencies (Note 9)
Equity:
Additional paid-in capital	185,727,368	156,463,146
Dividends and accumulated losses	(128,207,540)	(121,674,505)
Total stockholders' equity before noncontrolling interest	57,643,930	34,883,679
Noncontrolling interest	11,373,541	15,238,902
Total equity	69,017,471	50,122,581
TOTAL LIABILITIES AND EQUITY	161,834,626	185,568,616
Series D Preferred Stock [Member]
Equity:
Series D Preferred Stock, $0.01 par value per share; 1,000,000 shares authorized; 920,000 and 0 shares issued and outstanding (liquidation preference $25.00 per share) as of September 30, 2021 and December 31, 2020, respectively	9,200	0
Common Class A [Member]
Equity:
Series A Common Stock, $0.01 par value per share, shares authorized: 100,000,000; 11,490,230 shares and 9,508,363 shares were issued and outstanding at September 30, 2021 and December 31, 2020, respectively	$ 114,902	$ 95,038

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares	Sep. 30, 2021	Dec. 31, 2020
Preferred stock, shares authorized (in shares)	1,000,000
Series D Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, shares issued (in shares)	920,000	0
Preferred stock, shares outstanding (in shares)	920,000	0
Preferred stock, liquidation preference (in dollars per share)	$ 25	$ 25
Common Class A [Member]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	11,490,230	9,508,363
Common stock, shares outstanding (in shares)	11,490,230	9,508,363

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues:
Rental income	$ 4,185,212	$ 5,433,303	$ 14,216,234	$ 18,098,514
Fees and other income	190,967	230,265	675,283	715,609
Total revenue	4,376,179	5,663,568	14,891,517	18,814,123
Costs and expenses:
Rental operating costs	1,414,518	2,108,621	4,739,256	6,489,547
General and administrative	1,479,261	1,366,380	4,361,297	3,996,696
Depreciation and amortization	1,306,874	1,626,917	4,104,018	4,823,673
Impairment of real estate assets	0	0	300,000	845,674
Total costs and expenses	4,200,653	5,101,918	13,504,571	16,155,590
Other income (expense):
Interest and other (expense), net	(13,886)	(12,270)	(67,329)	(10,865)
Gain on sales of real estate, net	627,322	332,714	2,060,336	656,975
Gain on extinguishment of government debt	0	0	10,000	0
Income tax expense	(182,607)	(122,602)	(471,506)	(257,602)
Total other expense, net	(600,054)	(1,946,118)	(2,290,812)	(6,582,654)
Net loss	(424,528)	(1,384,468)	(903,866)	(3,924,121)
Less: Income attributable to noncontrolling interests	(427,303)	(363,777)	(1,759,608)	(854,070)
Net loss attributable to Presidio Property Trust, Inc. stockholders	(851,831)	(1,748,245)	(2,663,474)	(4,778,191)
Less: Preferred Stock Series D dividends	(539,056)	0	(634,892)	0
Net loss attributable to Presidio Property Trust, Inc. common stockholders	$ (1,390,887)	$ (1,748,245)	$ (3,298,366)	$ (4,778,191)
Net income (loss) per share attributable to Presidio Property Trust, Inc. common stockholders:
Basic & Diluted (in dollars per share)	$ (0.13)	$ (0.20)	$ (0.33)	$ (0.54)
Weighted average number of common shares outstanding - basic & diluted (in shares)	10,833,847	8,922,525	9,955,046	8,900,547
Mortgage Notes [Member]
Other income (expense):
Interest expense	$ (1,030,883)	$ (1,439,771)	$ (3,542,940)	$ (4,605,175)
Notes Payable [Member]
Other income (expense):
Interest expense	$ 0	$ (704,189)	$ (279,373)	$ (2,365,987)

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Changes in Equity (Unaudited) - USD ($)	Preferred Stock [Member]Series D Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Parent [Member]	Noncontrolling Interest [Member]	Total
Balance (in shares) at Dec. 31, 2019	0	8,881,842
Balance at Dec. 31, 2019	$ 0	$ 88,818	$ 152,129,120	$ (113,037,144)	$ 39,180,794	$ 17,440,394	$ 56,621,188
Net income (loss)	0	0	0	(1,107,130)	(1,107,130)	175,011	(932,119)
Distributions in excess of contributions received	$ 0	$ 0	0	0	0	(277,472)	(277,472)
Balance (in shares) at Mar. 31, 2020	0	8,881,842
Balance at Mar. 31, 2020	$ 0	$ 88,818	152,129,120	(114,144,274)	38,073,664	17,337,933	55,411,597
Balance (in shares) at Dec. 31, 2019	0	8,881,842
Balance at Dec. 31, 2019	$ 0	$ 88,818	152,129,120	(113,037,144)	39,180,794	17,440,394	56,621,188
Net income (loss)							(3,924,121)
Balance (in shares) at Sep. 30, 2020	0	8,922,036
Balance at Sep. 30, 2020	$ 0	$ 89,220	153,358,708	(117,815,335)	35,632,593	16,688,117	52,320,710
Balance (in shares) at Mar. 31, 2020	0	8,881,842
Balance at Mar. 31, 2020	$ 0	$ 88,818	152,129,120	(114,144,274)	38,073,664	17,337,933	55,411,597
Net income (loss)	0	0	0	(1,922,816)	(1,922,816)	315,282	(1,607,534)
Contributions received from noncontrolling interests, net of distributions paid	$ 0	$ 0	0	0	0	66,697	66,697
Share reconciliation adjustment (in shares)	0	(16,080)
Share reconciliation adjustment	$ 0	$ (162)	162	0	0	0	0
Issuance of stock for Limited Partnership interests (in shares)	0	59,274
Issuance of stock for Limited Partnership interests	$ 0	$ 594	1,247,396	0	1,247,990	(1,247,990)	0
Balance (in shares) at Jun. 30, 2020	0	8,925,036
Balance at Jun. 30, 2020	$ 0	$ 89,250	153,376,678	(116,067,090)	37,398,838	16,471,922	53,870,760
Net income (loss)	0	0		(1,748,245)	(1,748,245)	363,777	(1,384,468)
Distributions in excess of contributions received	$ 0	$ 0	0	0	0	(147,582)	(147,582)
Repurchase of Common Stock (in shares)	0	(3,000)
Repurchase of Common Stock	$ 0	$ (30)	(17,970)	0	(18,000)	0	(18,000)
Balance (in shares) at Sep. 30, 2020	0	8,922,036
Balance at Sep. 30, 2020	$ 0	$ 89,220	153,358,708	(117,815,335)	35,632,593	16,688,117	52,320,710
Balance (in shares) at Dec. 31, 2020	0	9,508,363
Balance at Dec. 31, 2020	$ 0	$ 95,038	156,463,146	(121,674,505)	34,883,679	15,238,902	50,122,581
Net income (loss)	0	0	0	(2,661,682)	(2,661,682)	406,608	(2,255,074)
Dividends paid on common stock	0	0	0	(998,795)	(998,795)	0	(998,795)
Distributions in excess of contributions received	$ 0	$ 0	0	0	0	(2,034,212)	(2,034,212)
Balance (in shares) at Mar. 31, 2021	0	9,508,363
Balance at Mar. 31, 2021	$ 0	$ 95,038	156,463,146	(125,334,982)	31,223,202	13,611,298	44,834,500
Balance (in shares) at Dec. 31, 2020	0	9,508,363
Balance at Dec. 31, 2020	$ 0	$ 95,038	156,463,146	(121,674,505)	34,883,679	15,238,902	50,122,581
Net income (loss)							(903,866)
Balance (in shares) at Sep. 30, 2021	920,000	11,490,230
Balance at Sep. 30, 2021	$ 9,200	$ 114,902	185,727,368	(128,207,540)	57,643,930	11,373,541	69,017,471
Balance (in shares) at Mar. 31, 2021	0	9,508,363
Balance at Mar. 31, 2021	$ 0	$ 95,038	156,463,146	(125,334,982)	31,223,202	13,611,298	44,834,500
Net income (loss)	0	0	0	850,039	850,039	925,697	1,775,736
Dividends paid on common stock	0	0	0	(1,009,389)	(1,009,389)	0	(1,009,389)
Distributions in excess of contributions received	0	0	0	0	0	(744,884)	(744,884)
Dividends to Series D preferred stockholder	$ 0	$ 0	0	(95,836)	(95,836)	0	(95,836)
Issuance of stock, net of issuance cost (in shares)	920,000	0
Issuance of stock, net of issuance costs	$ 9,200	$ 0	20,480,603	0	20,489,803	0	20,489,803
Balance (in shares) at Jun. 30, 2021	920,000	9,508,363
Balance at Jun. 30, 2021	$ 9,200	$ 95,038	176,943,749	(125,590,168)	51,457,819	13,792,111	65,249,930
Net income (loss)	0	0	0	(851,831)	(851,831)	427,303	(424,528)
Dividends paid on common stock	0	0	0	(1,226,485)	(1,226,485)	0	(1,226,485)
Distributions in excess of contributions received	0	0	0	0	0	(2,845,873)	(2,845,873)
Dividends to Series D preferred stockholder	$ 0	$ 0	0	(539,056)	(539,056)	0	(539,056)
Issuance of stock, net of issuance cost (in shares)	0	2,000,000
Issuance of stock, net of issuance costs	$ 0	$ 20,000	8,851,879	0	8,871,879	0	8,871,879
Repurchase of Common Stock (in shares)	0	(18,133)
Repurchase of Common Stock	$ 0	$ (136)	(68,260)	0	(68,396)	0	(68,396)
Balance (in shares) at Sep. 30, 2021	920,000	11,490,230
Balance at Sep. 30, 2021	$ 9,200	$ 114,902	$ 185,727,368	$ (128,207,540)	$ 57,643,930	$ 11,373,541	$ 69,017,471

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net loss	$ (903,866)	$ (3,924,121)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	4,104,018	4,823,673
Stock compensation	867,903	541,865
Bad debt expense	52	93,958
Gain on sale of real estate assets, net	(2,060,336)	(656,975)
Gain on extinguishment of government debt	(10,000)	0
Net change in fair value marketable securities	37,673	0
Impairment of real estate assets	300,000	845,674
Accretion of original issue discount	0	1,013,405
Amortization of financing costs	431,806	992,705
Amortization of above-market leases	42,064	38,012
Amortization of below-market leases	(46,481)	(122,439)
Straight-line rent adjustment	(215,655)	67,732
Changes in operating assets and liabilities:
Other assets	633,354	2,171,813
Accounts payable and accrued liabilities	(1,014,848)	(1,974,401)
Accrued real estate taxes	(1,040,680)	(1,014,760)
Net cash provided by operating activities	1,125,004	2,896,141
Cash flows from investing activities:
Real estate acquisitions	(7,758,066)	(8,996,248)
Additions to buildings and tenant improvements	(1,122,051)	(2,510,152)
Investment in marketable securities	(2,682,192)	0
Proceeds from sale of marketable securities	1,032,297	0
Additions to deferred leasing costs	(97,932)	(137,961)
Proceeds from sales of real estate, net	47,906,909	33,810,274
Net cash provided by investing activities	37,278,965	22,165,913
Cash flows from financing activities:
Proceeds from mortgage notes payable, net of issuance costs	8,003,807	13,339,739
Repayment of mortgage notes payable	(41,862,782)	(32,399,522)
Repayment of note payable	(7,675,598)	(5,224,402)
Payment of extension costs, note payable	0	(351,025)
Payment of deferred offering costs	(572,458)	(435,736)
Distributions to noncontrolling interests, net	(5,624,969)	(358,357)
Issuance of Common Stock Series A, net of offering costs	8,871,879	0
Issuance of Preferred Stock Series D, net of offering costs	20,489,803	0
Repurchase of common stock, at cost	(68,396)	(18,000)
Dividends paid to preferred stockholders	(455,207)	0
Dividends paid to common stockholders	(3,234,669)	0
Net cash used in financing activities	(22,128,590)	(25,447,303)
Net increase (decrease) in cash equivalents and restricted cash	16,275,379	(385,249)
Cash, cash equivalents and restricted cash - beginning of period	11,540,917	10,391,275
Cash, cash equivalents and restricted cash - end of period	27,816,296	10,006,026
Supplemental disclosure of cash flow information:
Interest paid-mortgage notes payable	3,407,689	4,542,959
Interest paid-notes payable	103,861	604,679
Non-cash financing activities:
Issuance of stock for limited partnership interests	0	1,247,990
Dividends payable - Preferred Stock Series D	$ 179,685	$ 0

Note 1 - Organization

Note 1 - Organization	9 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	1. Organization September 28, 1999, August 2010, October 2017, two The Company or one • The Company is the sole general partner and limited partner in two limited partnerships (NetREIT Palm Self-Storage LP and NetREIT Casa Grande LP), both of which, at September 30, 2021, • The Company is the general and limited partner in six #202, #203, #204, #205, #206, The Company has determined that the limited partnerships in which it owns less than 100% We have elected to be taxed as a REIT under Sections 856 860 90% not We, together with one no Reverse Stock Split. July 29, 2020, one Initial Public Offering October 6, 2020, not Additional Offerings & Warrants 3 April 27, 2021. may one may 415 1933 July 12, 2021, 3 August 2021 five In connection with this additional offering, we agreed to issue the Placement Agent Warrants to purchase up to 80,000 shares (the “Placement Agent Warrants”) of Series A Common Stock, representing 4.0% of the Series A Common Stock and shares of Series A Common Stock issuable upon exercise of the Pre-Funded Warrants. The Placement Agent Warrants were issued in August 2021, five July 2021 11 September 14, 2021. The Company evaluated the accounting guidance in ASC 480 815 September 30, 2021, none Preferred Stock Series D June 15, 2021, June 17, 2021, Repaid Note. September 17, 2019, September 1, 2020, October 1, 2020 March 31, 2021, September 30, 2020, December 31, 2020, first 2021, Liquidity. may 19, not may Short-term liquidity needs include paying our current operating costs, satisfying the debt service requirements of existing mortgages, completing tenant improvements, paying leasing commissions, and funding dividends to stockholders. Future principal payments due on mortgage notes payables, during the last three 2021, As the Company continues its operations, it may no not twelve

Note 2 - Significant Accounting

Note 2 - Significant Accounting Policies	9 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Significant Accounting Policies [Text Block]	2. There have been no 10 December 31, 2020 December 31, 2020 10 March 30, 2021. Basis of Presentation. 10 8 X. three nine September 30, 2021 2020 not may December 31, 2021. 10 December 31, 2020 December 31, 2020 10 March 30, 2021. three nine September 30, 2021 not December 31, 2021 19 Principles of Consolidation The Company classifies the noncontrolling interests in the NetREIT Partnerships as part of consolid ated net income (loss) in 2021 2020 February 2010. not Use of Estimates may Real Estate Assets and Lease Intangibles. The Company allocates the purchase price to tangible assets of an acquired property based on the estimated fair values of those tangible assets, assuming the property was vacant. Estimates of fair value for land, building and building improvements are based on many factors including but not third The value allocated to acquired lease intangibles is based on management’s evaluation of the specific characteristics of each tenant’s lease. Characteristics considered by management in allocating these values include but are not The value attributable to the above-market or below-market component of an acquired in-place lease is determined based upon the present value (using a market discount rate) of the difference between (i) the contractual rents to be paid pursuant to the lease over its remaining term, and (ii) management’s estimate of rents that would be paid using fair market rates over the remaining term of the l ease. The amounts allocated to above or below-market leases are amortized on a straight-line basis as an increase or reduction of rental income over the remaining non-cancelable term of the respective leases. Amortization of above and below-market rents resulted in a net increase in rental income of approximately $6,000 and $4,000 for the three nine September 30, 2021 , respectively. Amortization of above and below-market rents resulted in a net increase in rental income of approximately $26,000 and $84,000 for the three nine September 30, 2020 , respectively. The value of in-place leases and unamortized lease origination costs are amortized to expenses over the remaining term of the respective leases, which range from less than a year to ten third y to secure a new tenant reduced by the expired term of the respective lease. The amount allocated to tenant relationships is the benefit resulting from the likelihood of a tenant renewing its lease. Amortization expense related to these assets was approximately $68,000 and $275,000 for the three nine September 30, 2021 , respectively. Amortization expense related to these assets was approximately $116,000 and $369,000 fo three nine September 30, 2020 Deferred Leasing Costs. one five third September 30, 2021 December 31, 2020 mately $1.3 million and $1.9 million, respectively. Total amortization expense for the three nine September 30, 2021 was approximately $85,000 and $257,000, respectively. Total amortization expense for the three nine September 30, 2020 , was approximately $106,000 and $306,000, respectively. Cash Equivalents and Restricted Cash. September 30, 2021 December 31, 2020 third Real Estate Held for Sale. September 30, 2021 Deferred Offering Costs. September 30, 2021 December 31, 2020 3 December 29, 2020, April 13, 2021. September 30, 2021 December 31, 2020 September 30, 2021 sts related to the Series D Preferred Stock, netted against offering proceeds, totaled approximately $2.5 million and offering costs related to the issuance of additional Common Stock and related warrants, netted against offering proceeds, totaled approximately $1.1 million. Impairments of Real Estate Assets. not Properties held for sale are recorded at the lower of the carrying amount or the expected sales price less costs to sell. Although our strategy is to hold our properties over the long-term, if our strategy changes or market conditions otherwise dictate an earlier sale date, an impairment loss may During the fourth 2020, third March 31, 2021. May 2021. Fair Value Measurements three one three • Level 1: • Level 2: not • Level 3: no third 1 2. not not third may third not September 30, 2021 December 31, 2020, 1 no September 30, 2021 December 31, 2020. Additionally, when determining the fair value of a liability in circumstances in which a quoted price in an active market for an identical liability is not may not Earnings per share ( EPS ). 260, two two As of September 30, 2021 three nine September 30, 2021 not September 30, 2020, three nine September 30, 2020 not Subsequent Events. Recently Issued and Adopted Accounting Pronouncements. June 2017, No. 2016 13, Financial Instruments – Credit Losses, February 2020 No. 2020 02, Financial Instruments—Credit Losses (Topic 326 842 2016 13 2016 13 2016 13 December 15, 2019, 2020 02 December 15, 2022. not In August 2020, No. 2020 06, Debt—Debt with Conversion and Other Options (Subtopic 470 20 815 40 no No. 2020 06 December 15, 2021, no December 15, 2020, not

Note 3 - Recent Real Estate Tra

Note 3 - Recent Real Estate Transactions	9 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Real Estate Disclosure [Text Block]	3. During the nine September 30, 2021 • Waterman Plaza, which was sold on January 28, 2021, • Garden Gateway, which was sold on February 19, 2021, • Highland Court, which was sold on May 20, 2021, • Executive Office Park, which was sold on May 21, 2021, During the nine September 30, 2021 , t On August 17, 2021, 1031 1986, During the nine September 30, 2021 six During the nine September 30, 2021 During the nine September 30, 2020 • Centennial Tech Center, which was sold on February 5, 2020 • Union Terrace, which was sold on March 13, 2020 During the nine September 30, 2020 During the nine September 30, 2020

Note 4 - Real Estate Assets

Note 4 - Real Estate Assets	9 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Real Estate Assets [Text Block]	4. The Company owns a diverse portfolio of real estate assets. The primary types of properties the Company invests in are office, industrial, retail, and triple-net leased model home properties. We have five four two four September 30, 2021 • Seven one • Four • 85 model home residential properties (“Model Homes” or “Model Home Properties”), totaling approximately 276,000 square feet, leased back on a triple-net basis to homebuilders that are owned by six one A summary of the properties owned by the Company as of September 30, 2021 December 31, 2020 Date Real estate assets, net (in thousands) Property Name Acquired Location 2021 2020 Garden Gateway Plaza (1) March 2007 Colorado Springs, Colorado — $ 11,465 World Plaza (2) September 2007 San Bernardino, California 9,272 9,272 Executive Office Park (1) July 2008 Colorado Springs, Colorado — 5,106 Waterman Plaza (1) August 2008 San Bernardino, California — 3,500 Genesis Plaza (3) August 2010 San Diego, California 8,412 8,651 Dakota Center May 2011 Fargo, North Dakota 8,694 8,597 Grand Pacific Center March 2014 Bismarck, North Dakota 5,525 5,684 Arapahoe Center December 2014 Centennial, Colorado 8,901 9,233 Union Town Center December 2014 Colorado Springs, Colorado 9,212 9,345 West Fargo Industrial August 2015 Fargo, North Dakota 6,996 7,061 300 N.P. August 2015 Fargo, North Dakota 3,218 3,280 Research Parkway August 2015 Colorado Springs, Colorado 2,392 2,438 One Park Center August 2015 Westminster, Colorado 8,072 8,586 Highland Court (1) (4) August 2015 Centennial, Colorado — 10,500 Shea Center II December 2015 Highlands Ranch, Colorado 20,340 21,026 Mandolin (4) August 2021 Houston, Texas 4,899 — Presidio Property Trust, Inc. properties 95,933 123,744 Model Home properties (5) 2014 2020 TX, FL, IL, WI 29,955 42,510 Total real estate assets and lease intangibles, net $ 125,888 $ 166,254 ( 1 nine September 30, 2021 ( 2 September 30, 2021 ( 3 two ( 4 1031 ( 5 three September 30, 2021 .

Note 5 - Lease Intangibles

Note 5 - Lease Intangibles	9 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Intangible Assets Disclosure [Text Block]	5. The following table summarizes the net value of other intangible assets acquired and the accumulated amortization for each class of intangible asset: September 30, 2021 December 31, 2020 Lease Intangibles Accumulated Amortization Lease Intangibles, net Lease Intangibles Accumulated Amortization Lease Intangibles, net In-place leases $ 2,515,264 $ (2,320,045 ) $ 195,219 $ 3,136,587 $ (2,757,530 ) $ 379,057 Leasing costs 1,261,390 (1,146,572 ) 114,818 1,730,656 (1,510,559 ) 220,097 Above-market leases 333,485 (333,485 ) — 333,485 (291,421 ) 42,064 $ 4,110,139 $ (3,800,102 ) $ 310,037 $ 5,200,728 $ (4,559,510 ) $ 641,218 At September 30, 2021 December 31, 2020 September 30, 2021 December 31, 2020 The net value of acquired intangible liabilities was approximately $86,852 and $139,045 relating to below-market leases at September 30, 2021 December 31, 2020 Future aggregate approximate amortization expense for the Company's lease intangible assets is as follows: 2021 $ 52,866 2022 202,342 2023 17,526 2024 17,526 2025 15,670 Thereafter 4,107 Total $ 310,037

Note 6 - Other Assets

Note 6 - Other Assets	9 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Other Assets Disclosure [Text Block]	6. Other assets consist of the following: September 30, December 31, 2021 2020 Deferred rent receivable $ 1,644,276 $ 1,912,048 Prepaid expenses, deposits and other 273,585 215,946 Investment in marketable securities 1,670,693 83,241 Accounts receivable, net 363,104 541,885 Right-of-use assets, net 81,637 102,144 Other intangibles, net 97,483 142,483 Notes receivable 316,374 316,374 Deferred offering costs 2,386 108,660 Total other assets $ 4,449,538 $ 3,422,781 As of September 30, 2021, six September 30, 2021, September 30, 2021 December 31, 2020,

Note 7 - Mortgage Notes Payable

Note 7 - Mortgage Notes Payable	9 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Mortgage Notes Payable Disclosure [Text Block]	7. Mortgage notes payable consist of the following: Principal as of September 30, December 31, Loan Interest Mortgage note property 2021 2020 Type Rate (1) Maturity Waterman Plaza (2) $ — $ 3,207,952 Variable — — World Plaza (3) (4) — 5,802,568 Variable 2.91 % 7/5/2021 Garden Gateway Plaza (2) — 5,861,523 Fixed 5.00 % 8/5/2021 300 N.P. 2,243,328 2,273,478 Fixed 4.95 % 6/11/2022 Highland Court (2) — 6,274,815 Fixed 3.82 % 9/1/2022 Dakota Center 9,734,220 9,900,279 Fixed 4.74 % 7/6/2024 Research Parkway 1,719,390 1,760,432 Fixed 3.94 % 1/5/2025 Arapahoe Service Center 7,812,125 7,932,255 Fixed 4.34 % 1/5/2025 Union Town Center 8,197,495 8,315,550 Fixed 4.28 % 1/5/2025 One Park Centre 6,304,625 6,385,166 Fixed 4.77 % 9/5/2025 Genesis Plaza 6,196,202 6,276,273 Fixed 4.71 % 9/6/2025 Shea Center II 17,559,316 17,727,500 Fixed 4.92 % 1/5/2026 Executive Office Park (2) — 2,985,998 Fixed 4.83 % 6/1/2027 West Fargo Industrial 4,177,334 4,262,718 Fixed 3.27 % 8/5/2029 Grand Pacific Center (5) 3,649,729 3,738,142 Fixed 4.02 % 8/1/2037 Subtotal, Presidio Property Trust, Inc. Properties $ 67,593,764 $ 92,704,649 Model Home mortgage notes (3) 19,335,267 28,083,356 Fixed (6 ) 2021 2024 Mortgage Notes Payable $ 86,929,031 $ 120,788,005 Unamortized loan costs (673,351 ) (758,309 ) Mortgage Notes Payable, net $ 86,255,680 $ 120,029,696 ( 1 Interest rates as of September 30, 2021 ( 2 Waterman Plaza and Garden Gateway Plaza were sold during the first 2021, second 2021. ( 3 Property held for sale as of September 30, 2021 ( 4 During June 2021, ( 5 Interest rate is subject to reset on September 1, 2023. ( 6 Our model homes have stand-alone mortgage note at interest rates ranging from 2.50% to 5.63% per annum as of September 30, 2021 The Company is in compliance with all material conditions and covenants of its mortgage notes payable. Scheduled principal payments of mortgage notes payable were as follows as of September 30, 2021 Presidio Property Model Trust, Inc. Homes Total Principal Years ending December 31: Notes Payable Notes Payable Payments 2021 $ 336,488 $ 606,375 $ 942,863 2022 3,581,868 8,766,945 12,348,813 2023 1,410,835 4,241,024 5,651,859 2024 10,368,843 5,720,923 16,089,766 2025 28,770,832 — 28,770,832 Thereafter 23,124,898 — 23,124,898 Total $ 67,593,764 $ 19,335,267 $ 86,929,031

Note 8 - Notes Payable

Note 8 - Notes Payable	9 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Accounts Payable and Accrued Liabilities Disclosure [Text Block]	8. On September 17, 2019, September 1, 2020 , October 1, 2020 March 31, 2021 , September 30, 2020 , December 31, 2020 September 17, 2019 October 1, 2020. no September 30, 2021 December 31, 2020 The Company incurred approximately $1.1 million in legal and underwriting costs related to the transaction. These costs were recorded as debt issuance costs on the accompanying consolidated balance sheets as a direct deduction from the principal of the Polar Note and were amortized over the term of the Polar Note. During the first 2021, On April 22, 2020, 19 not no 2020. August 17, 2020, twelve 3.75% August 17, 2050. 19 On April 30, 2020, 19 April 22, 2020, December 31, 2020, January 2021, June 5, 2020, 24 December 31, 2020 March 31, 2021, On April 1, 2021, #203 203" , April 30, 2022 . one April May 2021, 203 June 1, 2021, no interest expense and interest income related to this promissory note during June 2021 On September 3, 2021, 202 204 four November 15, 2022. On August 17, 2021, August 17, 2022.

Note 9 - Commitments and Contin

Note 9 - Commitments and Contingencies	9 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	9. COMMITMENTS AND CONTINGENCIES The Company is obligated under certain tenant leases to fund tenant improvements and the expansion of the underlying leased properties. Litigation. may Environmental Matters. no not not not

Note 10 - Stockholders' Equity

Note 10 - Stockholders' Equity	9 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Stockholders' Equity Note Disclosure [Text Block]	10. Preferred Stock. may one On June 15, 2021, June 17, 2021, Dividends: Holders of shares of the Series D Preferred Stock are entitled to receive cumulative cash dividends at a rate of 9.375% per annum of the $25.00 per share liquidation preference (equivalent to $2.34375 per annum per share). Dividends will be payable monthly on the 15th not may Voting Rights: Holders of shares of the Series D Preferred Stock will generally have no not eighteen not may In addition, the affirmative vote of the holders of at least two may Liquidation Preference In the event of the Company’s voluntary or involuntary liquidation, dissolution or winding up, the holders of shares of Series D Preferred Stock will be entitled to be paid out of the assets the Company has legally available for distribution to its stockholders, subject to the preferential rights of the holders of any class or series of its stock the Company may $25.00 not may In the event that, upon any such voluntary or involuntary liquidation, dissolution or winding up, the Company’s available assets are insufficient to pay the amount of the liquidating distributions on all outstanding shares of Series D Preferred Stock and the corresponding amounts payable on all shares of other classes or series of the Company’s stock that it issues ranking on parity with the Series D Preferred Stock in the distribution of assets, then the holders of the Series D Preferred Stock and all other such classes or series of stock shall share ratably in any such distribution of assets in proportion to the full liquidating distributions to which they would otherwise be respectively entitled. Redemption: Commencing on or after June 15, 2026, may not June 15, 2026, may $25.00 not no not not The Company evaluated the accounting guidance in ASC 480 June 24, 2021, first June 15, 2021 June 30, 2021. December 2021 15th three September 30, 2021 Common Stock. not not not one On July 12, 2021, August 2021 five In connection with this additional offering, we agreed to issue the Placement Agent Warrants to purchase up to 80,000 shares of Series A Common Stock, representing 4.0% of the Series A Common Stock and shares of Series A Common Stock issuable upon exercise of the Pre-Funded Warrant. The Placement Agent Warrants were issued in August 2021, five The Company evaluated the accounting guidance in ASC 480 815 September 30, 2021, none Stock Repurchase Program September 17, 2021 September, Cash Dividends on Common Stock. nine September 30, 2021 three nine September 30, 2020 Partnership Interests. two five first five one Dividend Reinvestment Plan. may thirty January 23, 2012, December 7, 2018 October 6, 2020 September 30, 2021 nine September 30, 2021

Note 11 - Share-based Incentive

Note 11 - Share-based Incentive Plan	9 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Share-based Payment Arrangement [Text Block]	11. The Company maintains a restricted stock incentive plan for the purpose of attracting and retaining officers, employees, and non-employee board members. Share awards generally vest in equal annual installments over a three ten A summary of the activity for the Company’s restricted stock was as follows: Common Shares Outstanding shares: Balance at December 31, 2020 126,190 Granted 301,714 Forfeited (26,737 ) Vested — Balance at September 30, 2021 401,167 The non-vested restricted shares outstanding as of September 30, 2021 one seven The value of non-vested restricted stock granted as of September 30, 2021 December 31, 2020 ately $2.3 million and $0.9 million, respective Share-based compensation expense for the three nine September 30, 2021 ly $0.3 million and $0.9 million, respectively. During the three nine September 30, 2020 , share-based compensation expense was approximately $0.2 million and $0.5 million, respectively.

Note 12 - Segments

Note 12 - Segments	9 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	12. The Company’s reportable segments consist of three types of real estate properties for which the Company’s decision-makers internally evaluate operating performance and financial results: Office/Industrial Properties, Model Home Properties and Retail Properties. The Company also has certain corporate-level activities including accounting, finance, legal administration, and management information systems which are not no The Company evaluates the performance of its segments based upon net operating income (“NOI”), which is a non-GAAP supplemental financial measure. The Company defines NOI for its segments as operating revenues (rental income, tenant reimbursements and other operating income) less property and related expenses (property operating expenses, real estate taxes, insurance, asset management fees, impairments and provision for bad debt). NOI excludes certain items that are not The following tables compare the Company’s segment activity to its results of operations and financial position as of and for the three nine September 30, 2021 September 30, 2020 Three Months Ended September 30, For the Nine Months Ended September 30, 2021 2020 2021 2020 Office/Industrial Properties: Rental, fees and other income $ 2,888,361 $ 4,098,892 $ 10,149,013 $ 13,334,595 Property and related expenses (1,171,387 ) (1,813,950 ) (4,288,142 ) (5,539,320 ) Net operating income, as defined 1,716,974 2,284,942 5,860,871 7,795,275 Model Home Properties: Rental, fees and other income 739,558 1,058,329 2,528,748 3,268,074 Property and related expenses (25,804 ) (58,897 ) (106,304 ) (160,688 ) Net operating income, as defined 713,754 999,432 2,422,444 3,107,386 Retail Properties: Rental, fees and other income 748,312 548,392 2,213,808 2,305,412 Property and related expenses (217,379 ) (277,820 ) (644,862 ) (1,729,171 ) Net operating (loss) income, as defined 530,933 270,572 1,568,946 576,241 Reconciliation to net loss: Total net operating income, as defined, for reportable segments 2,961,661 3,554,946 9,852,261 11,478,902 General and administrative expenses (1,479,261 ) (1,366,380 ) (4,361,297 ) (3,996,696 ) Depreciation and amortization (1,306,874 ) (1,626,917 ) (4,104,018 ) (4,823,673 ) Interest expense (1,030,883 ) (2,143,960 ) (3,822,313 ) (6,971,162 ) Gain on extinguishment of government debt — — 10,000 — Other income (expense), net (13,886 ) (12,270 ) (67,329 ) (10,865 ) Income tax expense (182,607 ) (122,602 ) (471,506 ) (257,602 ) Gain (loss) on sale of real estate 627,322 332,715 2,060,336 656,975 Net income (loss) $ (424,528 ) $ (1,384,468 ) $ (903,866 ) $ (3,924,121 ) September 30, December 31, Assets by Reportable Segment: 2021 2020 Office/Industrial Properties: Land, buildings and improvements, net (1) $ 70,110,480 $ 99,120,649 Total assets (2) $ 67,689,503 $ 100,046,782 Model Home Properties: Land, buildings and improvements, net (1) $ 29,954,760 $ 42,509,596 Total assets (2) $ 28,972,715 $ 42,246,022 Retail Properties: Land, buildings and improvements, net (1) $ 25,774,657 $ 24,555,371 Total assets (2) $ 27,471,065 $ 26,108,109 Reconciliation to Total Assets: Total assets for reportable segments $ 124,133,283 $ 168,400,913 Other unallocated assets: Cash, cash equivalents and restricted cash 19,428,488 2,149,088 Other assets, net 18,272,856 15,018,615 Total Assets $ 161,834,627 $ 185,568,616 ( 1 Includes lease intangibles and the land purchase option related to property acquisitions. ( 2 Includes land, buildings and improvements, cash, cash equivalents, and restricted cash, current receivables, deferred rent receivables and deferred leasing costs and other related intangible assets, all shown on a net basis. For the Nine Months Ended September 30, Capital Expenditures by Reportable Segment 2021 2020 Office/Industrial Properties: Capital expenditures and tenant improvements $ 1,054,202 $ 2,501,075 Model Home Properties: Acquisition of operating properties 2,851,800 8,996,248 Retail Properties: Acquisition of operating properties 4,906,266 Capital expenditures and tenant improvements 67,849 9,077 Totals: Acquisition of operating properties, net 7,758,066 8,996,248 Capital expenditures and tenant improvements 1,122,051 2,510,152 Total real estate investments $ 8,880,117 $ 11,506,400

Note 13 - Subsequent Events

Note 13 - Subsequent Events	9 Months Ended
	Sep. 30, 2021
Notes to Financial Statements
Subsequent Events [Text Block]	13. On October 15, 2021, November 15, 2021, October 31, 2021. On October 28, 2021 three The purchase price was paid through cash payments of approximately $0.5 million and mortgage notes of approximately $1.0 million. During October 2021, November 2021.

Significant Accounting Policies

Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Basis of Accounting, Policy [Policy Text Block]	Basis of Presentation. 10 8 X. three nine September 30, 2021 2020 not may December 31, 2021. 10 December 31, 2020 December 31, 2020 10 March 30, 2021. three nine September 30, 2021 not December 31, 2021 19
Consolidation, Policy [Policy Text Block]	Principles of Consolidation The Company classifies the noncontrolling interests in the NetREIT Partnerships as part of consolid ated net income (loss) in 2021 2020 February 2010. not
Use of Estimates, Policy [Policy Text Block]	Use of Estimates may
Real Estate, Policy [Policy Text Block]	Real Estate Assets and Lease Intangibles. The Company allocates the purchase price to tangible assets of an acquired property based on the estimated fair values of those tangible assets, assuming the property was vacant. Estimates of fair value for land, building and building improvements are based on many factors including but not third The value allocated to acquired lease intangibles is based on management’s evaluation of the specific characteristics of each tenant’s lease. Characteristics considered by management in allocating these values include but are not The value attributable to the above-market or below-market component of an acquired in-place lease is determined based upon the present value (using a market discount rate) of the difference between (i) the contractual rents to be paid pursuant to the lease over its remaining term, and (ii) management’s estimate of rents that would be paid using fair market rates over the remaining term of the l ease. The amounts allocated to above or below-market leases are amortized on a straight-line basis as an increase or reduction of rental income over the remaining non-cancelable term of the respective leases. Amortization of above and below-market rents resulted in a net increase in rental income of approximately $6,000 and $4,000 for the three nine September 30, 2021 , respectively. Amortization of above and below-market rents resulted in a net increase in rental income of approximately $26,000 and $84,000 for the three nine September 30, 2020 , respectively. The value of in-place leases and unamortized lease origination costs are amortized to expenses over the remaining term of the respective leases, which range from less than a year to ten third y to secure a new tenant reduced by the expired term of the respective lease. The amount allocated to tenant relationships is the benefit resulting from the likelihood of a tenant renewing its lease. Amortization expense related to these assets was approximately $68,000 and $275,000 for the three nine September 30, 2021 , respectively. Amortization expense related to these assets was approximately $116,000 and $369,000 fo three nine September 30, 2020
Deferred Leasing Costs [Policy Text Block]	Deferred Leasing Costs. one five third September 30, 2021 December 31, 2020 mately $1.3 million and $1.9 million, respectively. Total amortization expense for the three nine September 30, 2021 was approximately $85,000 and $257,000, respectively. Total amortization expense for the three nine September 30, 2020 , was approximately $106,000 and $306,000, respectively.
Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block]	Cash Equivalents and Restricted Cash. September 30, 2021 December 31, 2020 third
Real Estate Held for Development and Sale, Policy [Policy Text Block]	Real Estate Held for Sale. September 30, 2021
Deferred Charges, Policy [Policy Text Block]	Deferred Offering Costs. September 30, 2021 December 31, 2020 3 December 29, 2020, April 13, 2021. September 30, 2021 December 31, 2020 September 30, 2021 sts related to the Series D Preferred Stock, netted against offering proceeds, totaled approximately $2.5 million and offering costs related to the issuance of additional Common Stock and related warrants, netted against offering proceeds, totaled approximately $1.1 million.
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]	Impairments of Real Estate Assets. not Properties held for sale are recorded at the lower of the carrying amount or the expected sales price less costs to sell. Although our strategy is to hold our properties over the long-term, if our strategy changes or market conditions otherwise dictate an earlier sale date, an impairment loss may During the fourth 2020, third March 31, 2021. May 2021.
Fair Value Measurement, Policy [Policy Text Block]	Fair Value Measurements three one three • Level 1: • Level 2: not • Level 3: no third 1 2. not not third may third not September 30, 2021 December 31, 2020, 1 no September 30, 2021 December 31, 2020. Additionally, when determining the fair value of a liability in circumstances in which a quoted price in an active market for an identical liability is not may not
Earnings Per Share, Policy [Policy Text Block]	Earnings per share ( EPS ). 260, two two As of September 30, 2021 three nine September 30, 2021 not September 30, 2020, three nine September 30, 2020 not
Subsequent Events, Policy [Policy Text Block]	Subsequent Events.
New Accounting Pronouncements, Policy [Policy Text Block]	Recently Issued and Adopted Accounting Pronouncements. June 2017, No. 2016 13, Financial Instruments – Credit Losses, February 2020 No. 2020 02, Financial Instruments—Credit Losses (Topic 326 842 2016 13 2016 13 2016 13 December 15, 2019, 2020 02 December 15, 2022. not In August 2020, No. 2020 06, Debt—Debt with Conversion and Other Options (Subtopic 470 20 815 40 no No. 2020 06 December 15, 2021, no December 15, 2020, not

Note 4 - Real Estate Assets (Ta

Note 4 - Real Estate Assets (Tables)	9 Months Ended
	Sep. 30, 2021
Notes Tables
Schedule of Real Estate Properties [Table Text Block]	Date Real estate assets, net (in thousands) Property Name Acquired Location 2021 2020 Garden Gateway Plaza (1) March 2007 Colorado Springs, Colorado — $ 11,465 World Plaza (2) September 2007 San Bernardino, California 9,272 9,272 Executive Office Park (1) July 2008 Colorado Springs, Colorado — 5,106 Waterman Plaza (1) August 2008 San Bernardino, California — 3,500 Genesis Plaza (3) August 2010 San Diego, California 8,412 8,651 Dakota Center May 2011 Fargo, North Dakota 8,694 8,597 Grand Pacific Center March 2014 Bismarck, North Dakota 5,525 5,684 Arapahoe Center December 2014 Centennial, Colorado 8,901 9,233 Union Town Center December 2014 Colorado Springs, Colorado 9,212 9,345 West Fargo Industrial August 2015 Fargo, North Dakota 6,996 7,061 300 N.P. August 2015 Fargo, North Dakota 3,218 3,280 Research Parkway August 2015 Colorado Springs, Colorado 2,392 2,438 One Park Center August 2015 Westminster, Colorado 8,072 8,586 Highland Court (1) (4) August 2015 Centennial, Colorado — 10,500 Shea Center II December 2015 Highlands Ranch, Colorado 20,340 21,026 Mandolin (4) August 2021 Houston, Texas 4,899 — Presidio Property Trust, Inc. properties 95,933 123,744 Model Home properties (5) 2014 2020 TX, FL, IL, WI 29,955 42,510 Total real estate assets and lease intangibles, net $ 125,888 $ 166,254

Note 5 - Lease Intangibles (Tab

Note 5 - Lease Intangibles (Tables)	9 Months Ended
	Sep. 30, 2021
Notes Tables
Schedule of Finite-Lived Intangible Assets [Table Text Block]	September 30, 2021 December 31, 2020 Lease Intangibles Accumulated Amortization Lease Intangibles, net Lease Intangibles Accumulated Amortization Lease Intangibles, net In-place leases $ 2,515,264 $ (2,320,045 ) $ 195,219 $ 3,136,587 $ (2,757,530 ) $ 379,057 Leasing costs 1,261,390 (1,146,572 ) 114,818 1,730,656 (1,510,559 ) 220,097 Above-market leases 333,485 (333,485 ) — 333,485 (291,421 ) 42,064 $ 4,110,139 $ (3,800,102 ) $ 310,037 $ 5,200,728 $ (4,559,510 ) $ 641,218
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	2021 $ 52,866 2022 202,342 2023 17,526 2024 17,526 2025 15,670 Thereafter 4,107 Total $ 310,037

Note 6 - Other Assets (Tables)

Note 6 - Other Assets (Tables)	9 Months Ended
	Sep. 30, 2021
Notes Tables
Schedule of Other Assets [Table Text Block]	September 30, December 31, 2021 2020 Deferred rent receivable $ 1,644,276 $ 1,912,048 Prepaid expenses, deposits and other 273,585 215,946 Investment in marketable securities 1,670,693 83,241 Accounts receivable, net 363,104 541,885 Right-of-use assets, net 81,637 102,144 Other intangibles, net 97,483 142,483 Notes receivable 316,374 316,374 Deferred offering costs 2,386 108,660 Total other assets $ 4,449,538 $ 3,422,781

Note 7 - Mortgage Notes Payab_2

Note 7 - Mortgage Notes Payable (Tables)	9 Months Ended
	Sep. 30, 2021
Notes Tables
Schedule of Debt [Table Text Block]	Principal as of September 30, December 31, Loan Interest Mortgage note property 2021 2020 Type Rate (1) Maturity Waterman Plaza (2) $ — $ 3,207,952 Variable — — World Plaza (3) (4) — 5,802,568 Variable 2.91 % 7/5/2021 Garden Gateway Plaza (2) — 5,861,523 Fixed 5.00 % 8/5/2021 300 N.P. 2,243,328 2,273,478 Fixed 4.95 % 6/11/2022 Highland Court (2) — 6,274,815 Fixed 3.82 % 9/1/2022 Dakota Center 9,734,220 9,900,279 Fixed 4.74 % 7/6/2024 Research Parkway 1,719,390 1,760,432 Fixed 3.94 % 1/5/2025 Arapahoe Service Center 7,812,125 7,932,255 Fixed 4.34 % 1/5/2025 Union Town Center 8,197,495 8,315,550 Fixed 4.28 % 1/5/2025 One Park Centre 6,304,625 6,385,166 Fixed 4.77 % 9/5/2025 Genesis Plaza 6,196,202 6,276,273 Fixed 4.71 % 9/6/2025 Shea Center II 17,559,316 17,727,500 Fixed 4.92 % 1/5/2026 Executive Office Park (2) — 2,985,998 Fixed 4.83 % 6/1/2027 West Fargo Industrial 4,177,334 4,262,718 Fixed 3.27 % 8/5/2029 Grand Pacific Center (5) 3,649,729 3,738,142 Fixed 4.02 % 8/1/2037 Subtotal, Presidio Property Trust, Inc. Properties $ 67,593,764 $ 92,704,649 Model Home mortgage notes (3) 19,335,267 28,083,356 Fixed (6 ) 2021 2024 Mortgage Notes Payable $ 86,929,031 $ 120,788,005 Unamortized loan costs (673,351 ) (758,309 ) Mortgage Notes Payable, net $ 86,255,680 $ 120,029,696
Contractual Obligation, Fiscal Year Maturity [Table Text Block]	Presidio Property Model Trust, Inc. Homes Total Principal Years ending December 31: Notes Payable Notes Payable Payments 2021 $ 336,488 $ 606,375 $ 942,863 2022 3,581,868 8,766,945 12,348,813 2023 1,410,835 4,241,024 5,651,859 2024 10,368,843 5,720,923 16,089,766 2025 28,770,832 — 28,770,832 Thereafter 23,124,898 — 23,124,898 Total $ 67,593,764 $ 19,335,267 $ 86,929,031

Note 11 - Share-based Incenti_2

Note 11 - Share-based Incentive Plan (Tables)	9 Months Ended
	Sep. 30, 2021
Notes Tables
Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]	Common Shares Outstanding shares: Balance at December 31, 2020 126,190 Granted 301,714 Forfeited (26,737 ) Vested — Balance at September 30, 2021 401,167

Note 12 - Segments (Tables)

Note 12 - Segments (Tables)	9 Months Ended
	Sep. 30, 2021
Notes Tables
Schedule of Segment Reporting Information, by Segment [Table Text Block]	Three Months Ended September 30, For the Nine Months Ended September 30, 2021 2020 2021 2020 Office/Industrial Properties: Rental, fees and other income $ 2,888,361 $ 4,098,892 $ 10,149,013 $ 13,334,595 Property and related expenses (1,171,387 ) (1,813,950 ) (4,288,142 ) (5,539,320 ) Net operating income, as defined 1,716,974 2,284,942 5,860,871 7,795,275 Model Home Properties: Rental, fees and other income 739,558 1,058,329 2,528,748 3,268,074 Property and related expenses (25,804 ) (58,897 ) (106,304 ) (160,688 ) Net operating income, as defined 713,754 999,432 2,422,444 3,107,386 Retail Properties: Rental, fees and other income 748,312 548,392 2,213,808 2,305,412 Property and related expenses (217,379 ) (277,820 ) (644,862 ) (1,729,171 ) Net operating (loss) income, as defined 530,933 270,572 1,568,946 576,241 Reconciliation to net loss: Total net operating income, as defined, for reportable segments 2,961,661 3,554,946 9,852,261 11,478,902 General and administrative expenses (1,479,261 ) (1,366,380 ) (4,361,297 ) (3,996,696 ) Depreciation and amortization (1,306,874 ) (1,626,917 ) (4,104,018 ) (4,823,673 ) Interest expense (1,030,883 ) (2,143,960 ) (3,822,313 ) (6,971,162 ) Gain on extinguishment of government debt — — 10,000 — Other income (expense), net (13,886 ) (12,270 ) (67,329 ) (10,865 ) Income tax expense (182,607 ) (122,602 ) (471,506 ) (257,602 ) Gain (loss) on sale of real estate 627,322 332,715 2,060,336 656,975 Net income (loss) $ (424,528 ) $ (1,384,468 ) $ (903,866 ) $ (3,924,121 )
Reconciliation of Assets from Segment to Consolidated [Table Text Block]	September 30, December 31, Assets by Reportable Segment: 2021 2020 Office/Industrial Properties: Land, buildings and improvements, net (1) $ 70,110,480 $ 99,120,649 Total assets (2) $ 67,689,503 $ 100,046,782 Model Home Properties: Land, buildings and improvements, net (1) $ 29,954,760 $ 42,509,596 Total assets (2) $ 28,972,715 $ 42,246,022 Retail Properties: Land, buildings and improvements, net (1) $ 25,774,657 $ 24,555,371 Total assets (2) $ 27,471,065 $ 26,108,109 Reconciliation to Total Assets: Total assets for reportable segments $ 124,133,283 $ 168,400,913 Other unallocated assets: Cash, cash equivalents and restricted cash 19,428,488 2,149,088 Other assets, net 18,272,856 15,018,615 Total Assets $ 161,834,627 $ 185,568,616
Reconciliation of Other Significant Reconciling Items from Segments to Consolidated [Table Text Block]	For the Nine Months Ended September 30, Capital Expenditures by Reportable Segment 2021 2020 Office/Industrial Properties: Capital expenditures and tenant improvements $ 1,054,202 $ 2,501,075 Model Home Properties: Acquisition of operating properties 2,851,800 8,996,248 Retail Properties: Acquisition of operating properties 4,906,266 Capital expenditures and tenant improvements 67,849 9,077 Totals: Acquisition of operating properties, net 7,758,066 8,996,248 Capital expenditures and tenant improvements 1,122,051 2,510,152 Total real estate investments $ 8,880,117 $ 11,506,400

Note 1 - Organization (Details

Note 1 - Organization (Details Textual)	Jul. 12, 2021$ / sharesshares	Jun. 17, 2021USD ($)shares	Jun. 17, 2021USD ($)shares	Jun. 15, 2021USD ($)$ / sharesshares	Oct. 06, 2020USD ($)$ / sharesshares	Jul. 29, 2020	Sep. 30, 2021USD ($)shares	Sep. 30, 2021USD ($)	Sep. 30, 2020USD ($)	Dec. 31, 2016	Aug. 31, 2021$ / sharesshares	Apr. 27, 2021USD ($)	Dec. 31, 2020USD ($)	Sep. 01, 2020USD ($)	Sep. 17, 2019USD ($)	Jan. 23, 2012$ / shares
Number of Limited Liability Companies							2	2		5
Number of Limited Partnerships in which Company is Sole General Partner										1
Shares Issued, Price Per Share (in dollars per share) | $ / shares																$ 19
Proceeds from Issuance of Common Stock								$ 8,871,879	$ 0
Equity Offering, Maximum Gross Proceeds												$ 200,000,000
Proceeds from Issuance of Preferred Stock and Preference Stock								20,489,803	$ 0
Long-Term Debt, Maturity, Remainder of Fiscal Year							$ 942,863	942,863
Mortgage Notes [Member]
Long-Term Debt, Maturity, Remainder of Fiscal Year							$ 900,000	$ 900,000
Polar Multi-Strategy Master Fund [Member] | Notes Payable to Banks [Member]
Debt Instrument, Face Amount															$ 14,000,000
Debt Instrument, Interest Rate, Stated Percentage															8.00%
Long-term Debt, Total													$ 7,700,000	$ 8,800,000
Debt Instrument, Renewal Fee Percentage									4.00%						4.00%
Class A Common Stock and Accompanying Common Stock Warrants [Member]
Shares Issued, Price Per Share (in dollars per share) | $ / shares	$ 5
Class A Common Stock and Accompanying Pre-funded Warrants [Member]
Shares Issued, Price Per Share (in dollars per share) | $ / shares	$ 4.99
Common Stock Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares	2,000,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares	$ 5.50
Warrants and Rights Outstanding, Term (Year)	5 years
Pre-funded Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares	1,000,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares	$ 0.01										$ 0.01
Placement Agent Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares											80,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares											$ 6.25
Warrants and Rights Outstanding, Term (Year)											5 years
Class of Warrant or Right, Securities Called By Warrants or Rights, Percentage of Class of Stock											4.00%
Common Stock Warrants and Placement Agent Warrants [Member]
Class of Warrant or Right, Exercised During Period (in shares) | shares							0
Common Class A [Member]
Stock Issued During Period, Shares, New Issues (in shares) | shares	1,000,000
Series D Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares) | shares		920,000		800,000
Shares Issued, Price Per Share (in dollars per share) | $ / shares				$ 25
Preferred Stock, Dividend Rate, Percentage				9.375%				9.375%
Proceeds from Issuance of Preferred Stock and Preference Stock		$ 20,500,000		$ 18,100,000
IPO [Member]
Stock Issued During Period, Shares, New Issues (in shares) | shares					500,000
Shares Issued, Price Per Share (in dollars per share) | $ / shares					$ 5
Proceeds from Issuance of Common Stock					$ 2,000,000
IPO [Member] | Underwriting Discounts [Member]
Payments of Stock Issuance Costs					500,000
IPO [Member] | Other Expenses [Member]
Payments of Stock Issuance Costs					$ 500,000
Over-Allotment Option [Member] | Series D Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares) | shares			120,000
Proceeds from Issuance of Preferred Stock and Preference Stock			$ 2,700,000
Option to Purchase Additional Shares, Period (Day)				45 days
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio						2
Model Home Properties [Member]
Number of Limited Partnerships in which Company is Sole General Partner								6
Commercial Property [Member]
Number of Real Estate Properties, Fee Simple							12	12
Commercial Property [Member] | Partially Owned Properties [Member]
Number of Real Estate Properties, Fee Simple							2	2
Model Home [Member] | Mortgage Notes [Member]
Long-Term Debt, Maturity, Remainder of Fiscal Year							$ 600,000	$ 600,000

Note 2 - Significant Accounti_2

Note 2 - Significant Accounting Policies (Details Textual)		3 Months Ended			9 Months Ended
		Sep. 30, 2021USD ($)shares	Mar. 31, 2021USD ($)	Sep. 30, 2020USD ($)shares	Sep. 30, 2021USD ($)shares	Sep. 30, 2020USD ($)shares	Dec. 31, 2020USD ($)
Amortization of above and below Market Leases		$ 6,000		$ 26,000	$ 4,000	$ 84,000
Amortization of Intangible Assets, Total		68,000		116,000	275,000	369,000
Deferred Costs, Total		1,300,000			1,300,000		$ 1,900,000
Operating Lease, Initial Direct Cost Expense, over Term		85,000		106,000	257,000	306,000
Cash Equivalents, at Carrying Value, Total		27,800,000			27,800,000		11,500,000
Restricted Cash, Total		$ 3,800,000			$ 3,800,000		4,200,000
Number of Real Estate Properties Held for Sale		1			1
Unamortized Deferred Stock Costs		$ 2,000			$ 2,000		109,000
Real Estate Investment Property and Lease Intangibles, Net		125,888,000			125,888,000		166,254,000
Impairment of Real Estate		$ 0		$ 0	$ 300,000	$ 845,674
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | shares		401,167		212,517	401,167	212,517
Series D Preferred Stock [Member]
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs					$ 2,500,000
Class A Common Stock and Related Warrants [Member]
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs					$ 1,100,000
Model Home [Member]
Number of Real Estate Properties Held for Sale		3			3
Highland Court [Member]
Real Estate Investment Property and Lease Intangibles, Net	[1],[2]	$ 0			$ 0		10,500,000
Impairment of Real Estate			$ 300,000
Highland Court [Member] | Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Disposal Group, Including Discontinued Operation, Consideration							$ 10,200,000
Maximum [Member]
Amortization of Value In Place Leases (Year)					10 years
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Life Used for Depreciation (Year)					5 years
Minimum [Member]
SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Life Used for Depreciation (Year)					1 year
[1]	A portion of the proceeds from the sale of Highland Court were used in like-kind exchange transactions pursued under Section 1031 of the Internal Revenue for the acquisition of our Mandolin property. Mandolin is owned by NetREIT Palm Self-Storage LP, through its wholly owned subsidiary NetREIT Highland LLC, and the Company is the sole general partner and owns 61.3% of NetREIT Palm Self-Storage LP.
[2]	This property was sold during the nine months ended September 30, 2021.

Note 3 - Recent Real Estate T_2

Note 3 - Recent Real Estate Transactions (Details Textual)	Aug. 17, 2021USD ($)ft²	May 21, 2021USD ($)	May 20, 2021USD ($)	Feb. 19, 2021USD ($)	Jan. 28, 2021USD ($)	Mar. 13, 2020USD ($)	Feb. 05, 2020USD ($)	Sep. 30, 2021USD ($)	Sep. 30, 2020USD ($)	Dec. 31, 2020USD ($)
Notes Payable, Total										$ 7,500,086
NetREIT Palm Self Storage, LP and NetREIT Highland LLC [Member]
Noncontrolling Interest, Ownership Percentage by Parent	61.30%
Discontinued Operations, Disposed of by Sale [Member]
Proceeds from Sale of Real Estate, Total								19,000,000	$ 12,600,000
Gain (Loss) on Sale of Properties								$ 2,900,000	$ 900,000
Number of Real Estate Properties								39	33
Waterman Plaza [Member] | Discontinued Operations, Disposed of by Sale [Member]
Proceeds from Sale of Real Estate, Total					$ 3,500,000
Gain (Loss) on Sale of Properties					$ (200,000)
Garden Gateway [Member] | Discontinued Operations, Disposed of by Sale [Member]
Proceeds from Sale of Real Estate, Total				$ 11,200,000
Gain (Loss) on Sale of Properties				$ (1,400,000)
Highland Court [Member] | Discontinued Operations, Disposed of by Sale [Member]
Proceeds from Sale of Real Estate, Total			$ 10,200,000
Gain (Loss) on Sale of Properties			$ (1,600,000)
Executive Office Park [Member] | Discontinued Operations, Disposed of by Sale [Member]
Proceeds from Sale of Real Estate, Total		$ 8,100,000
Gain (Loss) on Sale of Properties		$ 2,500,000
Mandolin [Member]
Area of Real Estate Property (Square Foot) | ft²	10,500
Payments to Acquire Buildings	$ 4,900,000
Property Under Triple Net Lease, Percent Occupied	100.00%
Property under Triple Net Lease, Term (Year)	15 years
Model Home [Member]
Real Estate Property, Consideration Transferred, Total								$ 2,900,000	$ 9,000,000
Payments to Acquire Residential Real Estate								900,000	2,700,000
Notes Payable, Total									$ 6,300,000
Number of Real Estate Properties									25
Model Home [Member] | Mortgage Notes [Member]
Notes Payable, Total								$ 2,000,000
Centennial Tech Center [Member] | Discontinued Operations, Disposed of by Sale [Member]
Proceeds from Sale of Real Estate, Total							$ 15,000,000
Gain (Loss) on Sale of Properties							$ (900,000)
Union Terrace [Member] | Discontinued Operations, Disposed of by Sale [Member]
Proceeds from Sale of Real Estate, Total						$ 11,300,000
Gain (Loss) on Sale of Properties						$ 690,000

Note 4 - Real Estate Assets (De

Note 4 - Real Estate Assets (Details Textual)	9 Months Ended	12 Months Ended
	Sep. 30, 2021ft²a	Dec. 31, 2016
Number of States Real Estate Property is Located	4
Number of Limited Partnerships in which Company is Sole General Partner		1
Number of Limited Liability Companies	2	5
Number of Real Estate Properties Held for Sale	1
NetREIT Palm Self-Storage LP [Member]
Noncontrolling Interest, Ownership Percentage by Parent	61.30%
Genesis Plaza [Member]
Real Estate Property, Number of Tenants-in-common Owning the Property	2
Percentage Beneficial Ownership in Property	76.40%
Genesis Plaza [Member] | Tenant-in-common One [Member]
Percentage Ownership in Property	57.00%
Genesis Plaza [Member] | Tenant-in-common Two [Member]
Percentage Ownership in Property	43.00%
Office/Industrial Properties [Member]
Area of Real Estate Property (Square Foot) | a	724,000
Office/Industrial Properties [Member] | Industrial Buildings [Member]
Number of Real Estate Properties	1
Office/Industrial Properties [Member] | Office Buildings [Member]
Number of Real Estate Properties	7
Retail Properties [Member]
Number of Real Estate Properties	4
Area of Real Estate Property (Square Foot)	121,000
Model Home [Member]
Number of Real Estate Properties	85
Area of Real Estate Property (Square Foot)	276,000
Number of Limited Partnerships in which Company is Sole General Partner	6
Number of Limited Liability Companies	1
Number of Real Estate Properties Held for Sale	3
COLORADO
Number of Real Estate Properties	5
NORTH DAKOTA
Number of Real Estate Properties	4
SOUTH DAKOTA
Number of Real Estate Properties	2
TEXAS
Number of Real Estate Properties	1

Note 4 - Real Estate Assets - S

Note 4 - Real Estate Assets - Summary of Properties Owned (Details) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2021	Dec. 31, 2020
Real estate assets owned		$ 125,888	$ 166,254
Garden Gateway Plaza [Member]
Geographic location	[1]	Colorado Springs, Colorado
Real estate assets owned	[1]	$ 0	11,465
World Plaza [Member]
Geographic location	[2]	San Bernardino, California
Real estate assets owned	[2]	$ 9,272	9,272
Executive Office Park [Member]
Geographic location	[1]	Colorado Springs, Colorado
Real estate assets owned	[1]	$ 0	5,106
Waterman Plaza [Member]
Geographic location	[1]	San Bernardino, California
Real estate assets owned	[1]	$ 0	3,500
Genesis Plaza [Member]
Geographic location	[3]	San Diego, California
Real estate assets owned	[3]	$ 8,412	8,651
Dakota Center [Member]
Geographic location		Fargo, North Dakota
Real estate assets owned		$ 8,694	8,597
Grand Pacific Center [Member]
Geographic location		Bismarck, North Dakota
Real estate assets owned		$ 5,525	5,684
Arapahoe Center [Member]
Geographic location		Centennial, Colorado
Real estate assets owned		$ 8,901	9,233
Union Town Center [Member]
Geographic location		Colorado Springs, Colorado
Real estate assets owned		$ 9,212	9,345
West Fargo Industrial [Member]
Geographic location		Fargo, North Dakota
Real estate assets owned		$ 6,996	7,061
The 300 N.P [Member]
Geographic location		Fargo, North Dakota
Real estate assets owned		$ 3,218	3,280
Research Parkway [Member]
Geographic location		Colorado Springs, Colorado
Real estate assets owned		$ 2,392	2,438
One Park Centre [Member]
Geographic location		Westminster, Colorado
Real estate assets owned		$ 8,072	8,586
Highland Court [Member]
Geographic location	[1],[4]	Centennial, Colorado
Real estate assets owned	[1],[4]	$ 0	10,500
Shea Center II [Member]
Geographic location		Highlands Ranch, Colorado
Real estate assets owned		$ 20,340	21,026
Mandolin [Member]
Geographic location	[4]	Houston, Texas
Real estate assets owned	[4]	$ 4,899	0
Presidio Property Trust, Inc. Properties [Member]
Real estate assets owned		$ 95,933	123,744
Model Home Properties [Member]
Geographic location	[5]	TX, FL, IL, WI
Real estate assets owned	[5]	$ 29,955	$ 42,510
[1]	This property was sold during the nine months ended September 30, 2021.
[2]	This property is held for sale as of September 30, 2021.
[3]	Genesis Plaza is owned by two tenants-in-common, each of which owns 57% and 43%, respectively, and we beneficially own an aggregate of 76.4%.
[4]	A portion of the proceeds from the sale of Highland Court were used in like-kind exchange transactions pursued under Section 1031 of the Internal Revenue for the acquisition of our Mandolin property. Mandolin is owned by NetREIT Palm Self-Storage LP, through its wholly owned subsidiary NetREIT Highland LLC, and the Company is the sole general partner and owns 61.3% of NetREIT Palm Self-Storage LP.
[5]	Includes three Model Homes listed as held for sale as of September 30, 2021.

Note 5 - Lease Intangibles (Det

Note 5 - Lease Intangibles (Details Textual) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets, Gross, Total	$ 4,110,139	$ 5,200,728
Finite-Lived Intangible Assets, Accumulated Amortization	3,800,102	4,559,510
Below Market Lease, Net, Ending Balance	86,852	139,045
Real Estate Assets Held for Sale [Member]
Finite-Lived Intangible Assets, Gross, Total	0	1,100,000
Finite-Lived Intangible Assets, Accumulated Amortization	$ 0	$ 1,100,000

Note 5 - Lease Intangibles - Ne

Note 5 - Lease Intangibles - Net Value of Other Intangibles (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Lease intangibles, gross	$ 4,110,139	$ 5,200,728
Accumulated Amortization	(3,800,102)	(4,559,510)
Lease Intangibles, net	310,037	641,218
Leases, Acquired-in-Place [Member]
Lease intangibles, gross	2,515,264	3,136,587
Accumulated Amortization	(2,320,045)	(2,757,530)
Lease Intangibles, net	195,219	379,057
Leasing Costs [Member]
Lease intangibles, gross	1,261,390	1,730,656
Accumulated Amortization	(1,146,572)	(1,510,559)
Lease Intangibles, net	114,818	220,097
Above Market Lease [Member]
Lease intangibles, gross	333,485	333,485
Accumulated Amortization	(333,485)	(291,421)
Lease Intangibles, net	$ 0	$ 42,064

Note 5 - Lease Intangibles - Am

Note 5 - Lease Intangibles - Amortization Expense (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
2021	$ 52,866
2022	202,342
2023	17,526
2024	17,526
2025	15,670
Thereafter	4,107
Total	$ 310,037	$ 641,218

Note 6 - Other Assets (Details

Note 6 - Other Assets (Details Textual)	Sep. 30, 2021USD ($)	Dec. 31, 2020USD ($)
Number of Publicly Traded REITs in which Common Shares are Owned	17
Number of Publicly Traded REITs in which Options are Owned	6
Marketable Securities, Total	$ 1,600,000	$ 83,000
Number of Publicly Traded REITs in which Shares and Options are Owned	2

Note 6 - Other Assets - Other A

Note 6 - Other Assets - Other Assets (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Investment in marketable securities	$ 1,600,000	$ 83,000
Total other assets	4,449,538	3,422,781
Other Assets [Member]
Deferred rent receivable	1,644,276	1,912,048
Prepaid expenses, deposits and other	273,585	215,946
Investment in marketable securities	1,670,693	83,241
Accounts receivable, net	363,104	541,885
Right-of-use assets, net	81,637	102,144
Other intangibles, net	97,483	142,483
Notes receivable	316,374	316,374
Deferred offering costs	2,386	108,660
Total other assets	$ 4,449,538	$ 3,422,781

Note 7 - Mortgage Notes Payab_3

Note 7 - Mortgage Notes Payable (Details Textual)	Sep. 30, 2021
Number of Real Estate Properties Held for Sale	1
Model Home [Member]
Number of Real Estate Properties Held for Sale	3
Model Home [Member] | Mortgage Notes [Member] | Minimum [Member]
Debt Instrument, Interest Rate, Stated Percentage	2.50%
Model Home [Member] | Mortgage Notes [Member] | Maximum [Member]
Debt Instrument, Interest Rate, Stated Percentage	5.63%

Note 7 - Mortgage Notes Payab_4

Note 7 - Mortgage Notes Payable - Mortgage Notes Payable (Details) - USD ($)		9 Months Ended
		Sep. 30, 2021	Dec. 31, 2020
Mortgage Notes Payable, net		$ 86,255,680	$ 120,029,696
Mortgage Notes [Member]
Mortgage Notes Payable		86,929,031	120,788,005
Unamortized loan costs		(673,351)	(758,309)
Mortgage Notes [Member] | Waterman Plaza [Member]
Mortgage Notes Payable	[1]	$ 0	3,207,952
Interest rate, variable	[1],[2]	0.00%
Mortgage Notes [Member] | World Plaza [Member]
Mortgage Notes Payable	[3],[4]	$ 0	5,802,568
Interest rate, variable	[2],[3],[4]	2.91%
Maturity date	[3],[4]	Jul. 5, 2021
Mortgage Notes [Member] | Garden Gateway Plaza [Member]
Mortgage Notes Payable	[1]	$ 0	5,861,523
Maturity date	[1]	Aug. 5, 2021
Interest rate	[1],[2]	5.00%
Mortgage Notes [Member] | The 300 N.P [Member]
Mortgage Notes Payable		$ 2,243,328	2,273,478
Maturity date		Jun. 11, 2022
Interest rate	[2]	4.95%
Mortgage Notes [Member] | Highland Court [Member]
Mortgage Notes Payable	[1]	$ 0	6,274,815
Maturity date	[1]	Sep. 1, 2022
Interest rate	[1],[2]	3.82%
Mortgage Notes [Member] | Dakota Center [Member]
Mortgage Notes Payable		$ 9,734,220	9,900,279
Maturity date		Jul. 6, 2024
Interest rate	[2]	4.74%
Mortgage Notes [Member] | Research Parkway [Member]
Mortgage Notes Payable		$ 1,719,390	1,760,432
Maturity date		Jan. 5, 2025
Interest rate	[2]	3.94%
Mortgage Notes [Member] | Arapahoe Center [Member]
Mortgage Notes Payable		$ 7,812,125	7,932,255
Maturity date		Jan. 5, 2025
Interest rate	[2]	4.34%
Mortgage Notes [Member] | Union Town Center [Member]
Mortgage Notes Payable		$ 8,197,495	8,315,550
Maturity date		Jan. 5, 2025
Interest rate	[2]	4.28%
Mortgage Notes [Member] | One Park Centre [Member]
Mortgage Notes Payable		$ 6,304,625	6,385,166
Maturity date		Sep. 5, 2025
Interest rate	[2]	4.77%
Mortgage Notes [Member] | Genesis Plaza [Member]
Mortgage Notes Payable		$ 6,196,202	6,276,273
Maturity date		Sep. 6, 2025
Interest rate	[2]	4.71%
Mortgage Notes [Member] | Shea Center II [Member]
Mortgage Notes Payable		$ 17,559,316	17,727,500
Maturity date		Jan. 5, 2026
Interest rate	[2]	4.92%
Mortgage Notes [Member] | Executive Office Park [Member]
Mortgage Notes Payable	[1]	$ 0	2,985,998
Maturity date	[1]	Jun. 1, 2027
Interest rate	[1],[2]	4.83%
Mortgage Notes [Member] | West Fargo Industrial [Member]
Mortgage Notes Payable		$ 4,177,334	4,262,718
Maturity date		Aug. 5, 2029
Interest rate	[2]	3.27%
Mortgage Notes [Member] | Grand Pacific Center [Member]
Mortgage Notes Payable	[5]	$ 3,649,729	3,738,142
Maturity date	[5]	Aug. 1, 2037
Interest rate	[2],[5]	4.02%
Mortgage Notes [Member] | Subtotal, Presidio Property Trust, Inc. Properties [Member]
Mortgage Notes Payable		$ 67,593,764	92,704,649
Mortgage Notes [Member] | Model Home [Member]
Mortgage Notes Payable	[4]	$ 19,335,267	$ 28,083,356
Mortgage Notes [Member] | Model Home [Member] | Minimum [Member]
Maturity date	[4],[6]	Dec. 31, 2021
Interest rate		2.50%
Mortgage Notes [Member] | Model Home [Member] | Maximum [Member]
Maturity date	[4],[6]	Dec. 31, 2024
Interest rate		5.63%
[1]	Waterman Plaza and Garden Gateway Plaza were sold during the first quarter of 2021, while Highland Court and Executive Office Park were sold in the second quarter of 2021.
[2]	Interest rates as of September 30, 2021.
[3]	During June 2021, this loan was paid in full with cash from the sale of other properties and excess cash on hand.
[4]	Property held for sale as of September 30, 2021. There were three model homes included as real estate assets held for sale.
[5]	Interest rate is subject to reset on September 1, 2023.
[6]	Our model homes have stand-alone mortgage note at interest rates ranging from 2.50% to 5.63% per annum as of September 30, 2021.

Note 7 - Mortgage Notes Payab_5

Note 7 - Mortgage Notes Payable - Scheduled Principal Payments of Mortgage Notes Payable (Details)	Sep. 30, 2021USD ($)
2021	$ 942,863
2022	12,348,813
2023	5,651,859
2024	16,089,766
2025	28,770,832
Thereafter	23,124,898
Total	86,929,031
Office/Industrial and Retail Notes Payable [Member]
2021	336,488
2022	3,581,868
2023	1,410,835
2024	10,368,843
2025	28,770,832
Thereafter	23,124,898
Total	67,593,764
Model Home Properies Notes Payable [Member]
2021	606,375
2022	8,766,945
2023	4,241,024
2024	5,720,923
2025	0
Thereafter	0
Total	$ 19,335,267

Note 8 - Notes Payable (Details

Note 8 - Notes Payable (Details Textual) - USD ($)

Jun. 01, 2021

Aug. 17, 2020

Apr. 30, 2020

Apr. 22, 2020

Jan. 31, 2021

May 31, 2021

Sep. 30, 2021

Mar. 31, 2021

Sep. 30, 2020

Sep. 30, 2021

Sep. 30, 2020

Dec. 31, 2020

Sep. 03, 2021

Aug. 17, 2021

Apr. 01, 2021

Sep. 01, 2020

Sep. 17, 2019

Gain (Loss) on Extinguishment of Debt, Total

$ 0

$ 0

$ 10,000

$ 0

Majority Owned Subsidiary NetREIT Highland [Member] | Promissory Note for the Acquisition of the Mandolin Property in Houston, Texas [Member]

Debt Instrument, Face Amount

$ 1,560,000

Debt Instrument, Interest Rate, Stated Percentage

4.00%

Economic Injury Disaster Loan [Member]

Proceeds from Issuance of Unsecured Debt

$ 150,000

$ 10,000

Debt Instrument, Decrease, Forgiveness

$ 10,000

Gain (Loss) on Extinguishment of Debt, Total

$ 10,000

Economic Injury Disaster Loan [Member] | Accounts Payable and Accrued Liabilities [Member]

Unsecured Debt, Total

$ 10,000

SBA CARES Act Paycheck Protection Program [Member]

Proceeds from Issuance of Unsecured Debt

$ 500,000

Unsecured Debt [Member] | LGD Investments Ltd [Member]

Debt Assumed from Related Party

$ 330,000

Unsecured Debt [Member] | Dubose Model Homes Investors #203, PL [Member] | LGD Investments Ltd [Member]

Debt Instrument, Face Amount

$ 330,000

Debt Instrument, Interest Rate, Stated Percentage

4.00%

Interest Expense, Debt, Total

$ 2,200

Promissory Notes for the Refinancing of Four Model Home Properties in Texas and Wisconsin [Member] | Majority Owned Subsidiary Dubose Model Home Investors 202 LP and 204 LP [Member]

Debt Instrument, Face Amount

$ 900,000

Debt Instrument, Interest Rate, Stated Percentage

3.00%

Polar Multi-Strategy Master Fund [Member] | Notes Payable to Banks [Member]

Debt Instrument, Face Amount

$ 14,000,000

Debt Instrument, Interest Rate, Stated Percentage

8.00%

Long-term Debt, Total

7,700,000

$ 8,800,000

Debt Instrument, Renewal Fee Percentage

4.00%

4.00%

4.00%

Repayments of Notes Payable, Including Interest

6,300,000

Debt Instrument, Unamortized Discount, Total

$ 0

$ 0

$ 0

$ 1,400,000

Debt Issuance Costs, Gross

$ 1,100,000

Note 10 - Stockholders' Equity

Note 10 - Stockholders' Equity (Details Textual)	Jul. 12, 2021$ / sharesshares	Jun. 24, 2021$ / shares	Jun. 17, 2021USD ($)shares	Jun. 17, 2021USD ($)shares	Jun. 15, 2021USD ($)$ / sharesshares	Jan. 23, 2012USD ($)$ / sharesshares	Sep. 30, 2021USD ($)$ / sharesshares	Sep. 30, 2021USD ($)$ / sharesshares	Sep. 30, 2021USD ($)$ / sharesshares	Sep. 30, 2021USD ($)$ / sharesshares	Sep. 30, 2020USD ($)	Dec. 31, 2016	Sep. 30, 2021USD ($)$ / sharesshares	Sep. 17, 2021USD ($)	Aug. 31, 2021$ / sharesshares	Dec. 31, 2020$ / sharesshares
Preferred Stock, Shares Authorized (in shares)							1,000,000	1,000,000	1,000,000	1,000,000			1,000,000
Shares Issued, Price Per Share (in dollars per share) | $ / shares						$ 19
Proceeds from Issuance of Preferred Stock and Preference Stock | $										$ 20,489,803	$ 0
Maximum Individual Common Stock Ownership, Percentage							9.80%	9.80%	9.80%	9.80%			9.80%
Payments of Dividends, Total | $											$ 0
Number of Limited Liability Companies							2	2	2	2		5	2
Number of Limited Partnerships in which Company is Sole General Partner												1
Registered Shares of Common Stock Pursuant to Dividend Reinvestment Plan (in shares)						3,000,000
Common Stock, Percentage of Purchase Price Per Share						95.00%
Payment of Sales, Commission or Dealer Manager Fee | $						$ 0
Notice Period for Amendments to Dividend Reinvestment Plan (Day)						30 days
Stock Issued During Period, Value, Dividend Reinvestment Plan | $									$ 0				$ 17,400,000
Stock Issued During Period, Shares, Dividend Reinvestment Plan (in shares)													917,074
Commercial Property [Member]
Number of Real Estate Properties							12	12	12	12			12
Commercial Property [Member] | Partially Owned Properties [Member]
Number of Real Estate Properties							2	2	2	2			2
Dividend One [Member]
Payments of Dividends, Total | $										$ 1,000,000
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share) | $ / shares										$ 0.101
Dividend Two [Member]
Payments of Dividends, Total | $										$ 1,000,000
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share) | $ / shares										$ 0.102
Dividend Three [Member]
Payments of Dividends, Total | $										$ 1,200,000
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share) | $ / shares										$ 0.103
Class A Common Stock and Accompanying Common Stock Warrants [Member]
Shares Issued, Price Per Share (in dollars per share) | $ / shares	$ 5
Class A Common Stock and Accompanying Pre-funded Warrants [Member]
Shares Issued, Price Per Share (in dollars per share) | $ / shares	$ 4.99
Common Stock Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	2,000,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares	$ 5.50
Warrants and Rights Outstanding, Term (Year)	5 years
Pre-funded Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)	1,000,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares	$ 0.01														$ 0.01
Placement Agent Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)															80,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares															$ 6.25
Warrants and Rights Outstanding, Term (Year)															5 years
Class of Warrant or Right, Securities Called By Warrants or Rights, Percentage of Class of Stock															4.00%
Common Stock Warrants and Placement Agent Warrants [Member]
Class of Warrant or Right, Exercised During Period (in shares)							0
Series D Preferred Stock [Member]
Preferred Stock, Shares Authorized (in shares)							1,000,000	1,000,000	1,000,000	1,000,000			1,000,000			1,000,000
Stock Issued During Period, Shares, New Issues (in shares)			920,000		800,000
Shares Issued, Price Per Share (in dollars per share) | $ / shares					$ 25
Proceeds from Issuance of Preferred Stock and Preference Stock | $			$ 20,500,000		$ 18,100,000
Preferred Stock, Dividend Rate, Percentage					9.375%					9.375%
Preferred Stock, Liquidation Preference Per Share (in dollars per share) | $ / shares							$ 25	$ 25	$ 25	$ 25			$ 25			$ 25
Preferred Stock, Dividend Rate, Per-Dollar-Amount (in dollars per share) | $ / shares										$ 2.34375
Preferred Stock, Number of Board of Directors Entitled to Vote if Dividends not Paid for 18 Monthly Dividend Periods							2	2	2	2			2
Preferred Stock, Percentage of Outstanding Shares Required to Authorize Senior Ranking Stock							66.67%	66.67%	66.67%	66.67%			66.67%
Preferred Stock, Redemption Price Per Share (in dollars per share) | $ / shares							$ 25	$ 25	$ 25	$ 25			$ 25
Preferred Stock, Dividends Per Share, Declared (in dollars per share) | $ / shares		$ 0.10417
Dividends, Preferred Stock, Cash | $								$ 455,207
Series D Preferred Stock [Member] | Over-Allotment Option [Member]
Stock Issued During Period, Shares, New Issues (in shares)				120,000
Proceeds from Issuance of Preferred Stock and Preference Stock | $				$ 2,700,000
Option to Purchase Additional Shares, Period (Day)					45 days
Common Class A [Member]
Stock Issued During Period, Shares, New Issues (in shares)	1,000,000
Common Stock, Shares Authorized (in shares)							100,000,000	100,000,000	100,000,000	100,000,000			100,000,000			100,000,000
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares							$ 0.01	$ 0.01	$ 0.01	$ 0.01			$ 0.01			$ 0.01
Common Stock, Shares, Issued, Total (in shares)							11,490,230	11,490,230	11,490,230	11,490,230			11,490,230			9,508,363
Stock Repurchase Program, Authorized Amount | $														$ 10,000,000
Stock Repurchased During Period, Shares (in shares)							18,133
Stock Repurchased, Average Cost Per Share (in dollars per share) | $ / shares							$ 3.73692
Stock Repurchased, Commission Per Share (in dollars per share) | $ / shares							$ 0.035
Stock Repurchased During Period, Value | $							$ 68,396
Common Class B [Member]
Common Stock, Shares Authorized (in shares)							1,000	1,000	1,000	1,000			1,000
Common Stock, Shares, Issued, Total (in shares)							0	0	0	0			0
Common Class C [Member]
Common Stock, Shares Authorized (in shares)							9,000,000	9,000,000	9,000,000	9,000,000			9,000,000
Common Stock, Shares, Issued, Total (in shares)							0	0	0	0			0
Common Stock, Number of Entitled Votes							1	1	1	1			1

Note 11 - Share-based Incenti_3

Note 11 - Share-based Incentive Plan (Details Textual) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Jan. 23, 2012	Dec. 31, 2006
Shares Issued, Price Per Share (in dollars per share)						$ 19
Share-based Payment Arrangement, Expense	$ 0.3	$ 0.2	$ 0.9	$ 0.5
Restricted Stock [Member]
Shares Issued, Price Per Share (in dollars per share)							$ 20
Nonvested Resctricted Stock [Member]
Restricted Stock, Value, Shares Issued Net of Tax Withholdings			$ 2.3		$ 0.9
Minimum [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)			3 years
Minimum [Member] | Nonvested Resctricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)			1 year
Maximum [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)			10 years
Maximum [Member] | Nonvested Resctricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)			7 years

Note 11 - Share-based Incenti_4

Note 11 - Share-based Incentive Plan - Summary of Activity for Restricted Stock (Details) - Restricted Stock [Member]	9 Months Ended
	Sep. 30, 2021shares
Balance (in shares)	126,190
Granted (in shares)	301,714
Forfeited (in shares)	(26,737)
Vested (in shares)	0
Balance (in shares)	401,167

Note 12 - Segments (Details Tex

Note 12 - Segments (Details Textual)	9 Months Ended
	Sep. 30, 2021
Number of Reportable Segments	3

Note 12 - Segments - Operating

Note 12 - Segments - Operating Income by Segment (Details) - USD ($)	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Rental, fees and other income	$ 4,376,179			$ 5,663,568			$ 14,891,517	$ 18,814,123
Property and related expenses	(1,414,518)			(2,108,621)			(4,739,256)	(6,489,547)
General and administrative expenses	(1,479,261)			(1,366,380)			(4,361,297)	(3,996,696)
Depreciation and amortization	(1,306,874)			(1,626,917)			(4,104,018)	(4,823,673)
Interest expense	(1,030,883)			(2,143,960)			(3,822,313)	(6,971,162)
Gain on extinguishment of government debt	0			0			10,000	0
Other income (expense), net	(13,886)			(12,270)			(67,329)	(10,865)
Income tax expense	(182,607)			(122,602)			(471,506)	(257,602)
Gain (loss) on sale of real estate	627,322			332,715			2,060,336	656,975
Net loss	(424,528)	$ 1,775,736	$ (2,255,074)	(1,384,468)	$ (1,607,534)	$ (932,119)	(903,866)	(3,924,121)
Operating Segments [Member]
Net operating income, as defined	2,961,661			3,554,946			9,852,261	11,478,902
Office/Industrial Properties [Member] | Operating Segments [Member]
Rental, fees and other income	2,888,361			4,098,892			10,149,013	13,334,595
Property and related expenses	(1,171,387)			(1,813,950)			(4,288,142)	(5,539,320)
Net operating income, as defined	1,716,974			2,284,942			5,860,871	7,795,275
Model Home Properties [Member] | Operating Segments [Member]
Rental, fees and other income	739,558			1,058,329			2,528,748	3,268,074
Property and related expenses	(25,804)			(58,897)			(106,304)	(160,688)
Net operating income, as defined	713,754			999,432			2,422,444	3,107,386
Retail Properties [Member] | Operating Segments [Member]
Rental, fees and other income	748,312			548,392			2,213,808	2,305,412
Property and related expenses	(217,379)			(277,820)			(644,862)	(1,729,171)
Net operating income, as defined	$ 530,933			$ 270,572			$ 1,568,946	$ 576,241

Note 12 - Segments - Assets by

Note 12 - Segments - Assets by Reportable Segment (Details) - USD ($)		Sep. 30, 2021	Dec. 31, 2020
Total assets		$ 161,834,626	$ 185,568,616
Cash, cash equivalents and restricted cash		27,816,296	11,540,917
Other assets, net		4,449,538	3,422,781
Operating Segments [Member]
Total assets		124,133,283	168,400,913
Segment Reconciling Items [Member]
Total assets		161,834,627	185,568,616
Cash, cash equivalents and restricted cash		19,428,488	2,149,088
Other assets, net		18,272,856	15,018,615
Office/Industrial Properties [Member] | Operating Segments [Member]
Land, buildings and improvements, net	[1]	70,110,480	99,120,649
Total assets	[2]	67,689,503	100,046,782
Model Home Properties [Member] | Operating Segments [Member]
Land, buildings and improvements, net	[1]	29,954,760	42,509,596
Total assets	[2]	28,972,715	42,246,022
Retail Properties [Member] | Operating Segments [Member]
Land, buildings and improvements, net	[1]	25,774,657	24,555,371
Total assets	[2]	$ 27,471,065	$ 26,108,109
[1]	Includes lease intangibles and the land purchase option related to property acquisitions.
[2]	Includes land, buildings and improvements, cash, cash equivalents, and restricted cash, current receivables, deferred rent receivables and deferred leasing costs and other related intangible assets, all shown on a net basis.

Note 12 - Segments - Capital Ex

Note 12 - Segments - Capital Expenditures by Reportable Segment (Details) - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Capital expenditures and tenant improvements	$ 1,122,051	$ 2,510,152
Acquisition of operating properties	7,758,066	8,996,248
Total real estate investments	8,880,117	11,506,400
Office/Industrial Properties [Member]
Capital expenditures and tenant improvements	1,054,202	2,501,075
Model Home Properties [Member]
Acquisition of operating properties	2,851,800	8,996,248
Retail Properties [Member]
Capital expenditures and tenant improvements	67,849	9,077
Acquisition of operating properties	$ 4,906,266

Note 13 - Subsequent Events (De

Note 13 - Subsequent Events (Details Textual)	Oct. 28, 2021USD ($)	Oct. 15, 2021$ / shares	Jun. 24, 2021$ / shares	Nov. 30, 2021USD ($)	Sep. 30, 2021USD ($)	Dec. 31, 2020USD ($)
Notes Payable, Total						$ 7,500,086
Property in Baltimore, MD [Member] | Forecast [Member]
Real Estate Property, Consideration Transferred, Total				$ 8,700,000
Subsequent Event [Member] | Model Home Properties in Houston, Texas [Member]
Number of Properties Acquired	3
Real Estate Property, Consideration Transferred, Total	$ 1,500,000
Payments to Acquire Residential Real Estate	500,000
Subsequent Event [Member] | Model Home Properties in Houston, Texas [Member] | Mortgage Notes [Member]
Notes Payable, Total	$ 1,000,000
Series D Preferred Stock [Member]
Preferred Stock, Dividends Per Share, Declared (in dollars per share) | $ / shares			$ 0.10417
Series D Preferred Stock [Member] | Subsequent Event [Member]
Preferred Stock, Dividends Per Share, Declared (in dollars per share) | $ / shares		$ 0.19531
Dividends Payable, Date to be Paid		Nov. 15, 2021
Dividends Payable, Date of Record		Oct. 31, 2021