Alta Equipment (ALTG) S-1 3 Dec 20 IPO registration Financial data

Cover

Cover	9 Months Ended
	Sep. 30, 2020
Cover [Abstract]
Document Type	S-1
Amendment Flag	false
Entity Registrant Name	ALTA EQUIPMENT GROUP INC.
Entity Central Index Key	0001759824
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($)	Sep. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
CURRENT ASSETS
Cash	$ 100,000	$ 654,488	$ 49,658
Accounts receivable, net	122,800,000	101,200,000
Prepaid expenses		178,037
Inventories, net	221,100,000	137,200,000
Prepaid expenses and other current assets	13,200,000	5,700,000
Total current assets	357,200,000	244,100,000	49,658
PROPERTY AND EQUIPMENT, NET	293,700,000	196,500,000
Deferred offering costs			162,500
Marketable Securities held in Trust Account		145,998,591
OTHER ASSETS
Goodwill	22,800,000	8,600,000
Intangible assets, net	24,200,000	3,000,000
Other assets	1,900,000	2,000,000
Total other assets	48,900,000	13,600,000
TOTAL ASSETS	699,800,000	454,200,000	212,158
CURRENT LIABILITIES
Lines of credit, net	139,000,000	72,500,000
Accounts payable and accrued expenses		1,561,966	162,500
Payable to related party		99,641	8,279
Current portion of long-term debt	7,800,000	7,100,000
Income taxes payable		309,000
Accounts payable	62,800,000	31,100,000
Note payable - related party			50,000
Customer deposits	6,800,000	7,200,000
Accrued expenses	26,800,000	16,000,000
Other current liabilities	13,300,000	9,300,000
Total current liabilities	411,400,000	343,400,000
LONG-TERM LIABILITIES
Long-term debt, net of current portion	136,400,000	86,500,000
Capital lease obligations, net of current portion	800,000	1,400,000
Buyback residual obligations, net of current portion	800,000	700,000
Guaranteed purchase obligation, net of current portion	7,400,000	9,000,000
Lease liability, net of current portion	2,700,000	3,700,000
Deferred tax liability	15,600,000
Other liabilities	10,000,000	3,100,000
Warrant liability	0	29,600,000
TOTAL LIABILITIES	585,100,000	477,400,000	220,779
CONTINGENCIES - NOTE 11
Class A common stock subject to possible redemption; 13,820,208 shares (at redemption value of approximately $10.12 per share)		139,860,505
STOCKHOLDERS' EQUITY (DEFICIT)
Preferred stock
Additional paid-incapital	183,600,000	4,999,670
Treasury stock	(5,900,000)
Retained deficit	(63,000,000)	(23,200,000)	(8,980)
Total stockholders' equity (deficit)	114,700,000	(23,200,000)	12,200,000
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	699,800,000	454,200,000
Class A Common Stock
STOCKHOLDERS' EQUITY (DEFICIT)
Common stock		102
Total stockholders' equity (deficit)		102
Class B Common Stock
STOCKHOLDERS' EQUITY (DEFICIT)
Common stock		359	359
Total stockholders' equity (deficit)		359	359
New Equipment
CURRENT LIABILITIES
Floor plan payable	118,600,000	87,700,000
Used and Rental Equipment
CURRENT LIABILITIES
Floor plan payable	$ 36,300,000	112,500,000
Previously Reported
CURRENT ASSETS
Total current assets		832,525
OTHER ASSETS
TOTAL ASSETS		146,831,116
LONG-TERM LIABILITIES
TOTAL LIABILITIES		1,970,607
STOCKHOLDERS' EQUITY (DEFICIT)
Retained deficit		(127)
Total stockholders' equity (deficit)		5,000,004	(8,621)
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY		$ 146,831,116	$ 212,158

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts receivable, net of allowances	$ 6.2	$ 4.4
Preferred stock, par value	$ 0.0001	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	1,000,000	1,000,000	1,000,000
Preferred stock, shares issued	0
Preferred stock, shares outstanding	0
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares issued	29,511,359	7,300,000
Common stock, shares outstanding	29,511,359	7,300,000
Common stock,subject to possible redemption,shares		13,820,208
Class A Common Stock
Common stock, par value		$ 0.0001	$ 0.0001
Common stock, shares issued		1,017,292	1,017,292
Common stock, shares outstanding		1,017,292	1,017,291
Common stock, shares authorized		100,000,000	100,000,000
Common stock,subject to possible redemption,shares		13,820,208
Common stock subject to possible redemption par value		$ 10.12
Class B Common Stock
Common stock, par value		$ 0.0001	$ 0.0001
Common stock, shares issued		3,593,750	3,593,750
Common stock, shares outstanding		3,593,750	3,593,750
Common stock, shares authorized		25,000,000	25,000,000

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
Revenues:
Net revenue	$ 220,600,000	$ 149,800,000	$ 593,200,000	$ 388,000,000
Cost of revenues:
Cost of revenue	163,900,000	105,600,000	443,100,000	277,700,000
Gross profit	56,700,000	44,200,000	150,100,000	110,300,000
General and administrative expenses	58,400,000	37,500,000	153,200,000	95,600,000
Depreciation and amortization expense	1,800,000	500,000	4,500,000	1,800,000
Total general and administrative expenses	60,200,000	38,000,000	157,700,000	97,400,000	$ 1,934,799		$ 342
(Loss) income from operations	(3,500,000)	6,200,000	(7,600,000)	12,900,000	(1,934,799)		(342)
Other income (expense)
Interest income					2,252,652
Interest expense, floor plan payable - new equipment	(500,000)	(900,000)	(1,800,000)	(2,400,000)
Interest expense - other	(5,600,000)	(4,700,000)	(15,900,000)	(12,700,000)
Other income	8,000,000	300,000	8,700,000	900,000
Change in fair market of warrants		(28,300,000)		(28,300,000)
Loss on extinguishment of debt			(7,600,000)
Total other income (expense)	1,900,000	(33,600,000)	(16,600,000)	(42,500,000)
Income (loss) before provision for income taxes	(1,600,000)	(27,400,000)	(24,200,000)	(29,600,000)	317,853		(342)
Income tax benefit	(1,900,000)	0	(3,400,000)	0	309,000		800
Net income (loss)	$ 300,000	$ (27,400,000)	$ (20,800,000)	$ (29,600,000)	$ 8,853		$ (1,142)
Basic and diluted income (loss) per share	$ 0.01	$ (3.74)	$ (0.81)	$ (4.05)	$ (0.56)	[1]	$ 0	[1]
Basic and diluted weighted average common shares outstanding	29,221,460	7,300,000	25,689,145	7,300,000	2,961,370	[2]	3,125,000	[2]
New and Used Equipment Sales
Revenues:
Net revenue	$ 97,900,000	$ 61,100,000	$ 275,200,000	$ 167,100,000
Cost of revenues:
Cost of revenue	84,400,000	53,400,000	240,300,000	146,600,000
Parts Sales
Revenues:
Net revenue	35,500,000	22,900,000	92,300,000	60,000,000
Cost of revenues:
Cost of revenue	24,300,000	14,900,000	63,300,000	39,400,000
Service Revenue
Revenues:
Net revenue	35,500,000	27,300,000	94,100,000	67,200,000
Cost of revenues:
Cost of revenue	13,500,000	10,000,000	35,900,000	24,300,000
Rental Revenue
Revenues:
Net revenue	32,200,000	27,800,000	83,400,000	66,900,000
Cost of revenues:
Cost of revenue	5,400,000	4,300,000	14,800,000	11,400,000
Rental Equipment Sales
Revenues:
Net revenue	19,500,000	10,700,000	48,200,000	26,800,000
Cost of revenues:
Cost of revenue	17,100,000	9,300,000	41,700,000	23,100,000
Rental Depreciation
Cost of revenues:
Cost of revenue	$ 19,200,000	$ 13,700,000	$ 47,100,000	$ 32,900,000
[1]	Loss per common share - basic and diluted excludes income attributable to common stock subject to possible redemption of $1,676,357 for the year ended December 31, 2019.
[2]	Excludes an aggregate of 13,820,208 shares of common stock subject to possible redemption at December 31, 2019.

CONSOLIDATED STATEMENTS OF OP_2

CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical)	12 Months Ended
	Dec. 31, 2019USD ($)shares
Income Statement [Abstract]
Common stock,subject to possible redemption,shares | shares	13,820,208
Loss per common share - basic and diluted excludes income attributable to common stock subject to possible redemption | $	$ (1,676,357)

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDER'S EQUITY (DEFICIT) - USD ($)	Total	Previously Reported	Class A Common Stock	Class B Common Stock	Common Stock	Additional Paid-in Capital	Additional Paid-in CapitalPreviously Reported	Retained Earnings	Retained EarningsPreviously Reported	Treasury Stock
Balance at Dec. 31, 2017	$ (7,479)			$ 359				$ (7,838)
Balance, shares at Dec. 31, 2017				3,593,750
Net income (loss)	(1,142)							(1,142)
Balance at Dec. 31, 2018	12,200,000	$ (8,621)		$ 359				12,200,000	$ (8,980)
Balance, shares at Dec. 31, 2018				3,593,750	7,300,000
Net income (loss)	(29,600,000)							(29,600,000)
Balance at Sep. 30, 2019	(17,400,000)							(17,400,000)
Balance, shares at Sep. 30, 2019					7,300,000
Balance at Dec. 31, 2018	12,200,000	(8,621)		$ 359				12,200,000	(8,980)
Balance, shares at Dec. 31, 2018				3,593,750	7,300,000
Class A common stock issued net of offering costs of $3,534,723	140,235,277		$ 1,438			$ 140,233,839
Class A common stock issued net of offering costs of $3,534,723, shares			14,375,000
Private Placement of Class A common stock issued	4,625,000		$ 46			4,624,954
Private Placement of Class A common stock issued, shares			462,500
Common stock subject to possible redemption	(139,860,505)		$ (1,382)			(139,859,123)
Common stock subect to possible redemption, shares			(13,820,208)
Net income (loss)	8,853							8,853
Balance at Dec. 31, 2019	(23,200,000)	5,000,004	$ 102	$ 359			$ 4,999,670	(23,200,000)	(127)
Balance, shares at Dec. 31, 2019			1,017,292	3,593,750	7,300,000
Balance at Jun. 30, 2019	10,000,000							10,000,000
Balance, shares at Jun. 30, 2019					7,300,000
Net income (loss)	(27,400,000)							(27,400,000)
Balance at Sep. 30, 2019	(17,400,000)							(17,400,000)
Balance, shares at Sep. 30, 2019					7,300,000
Balance at Dec. 31, 2019	(23,200,000)	$ 5,000,004	$ 102	$ 359			$ 4,999,670	(23,200,000)	$ (127)
Balance, shares at Dec. 31, 2019			1,017,292	3,593,750	7,300,000
Net income (loss)	(20,800,000)							(20,800,000)
Opening deferred tax liabilities under reverse recapitalization	(19,000,000)							(19,000,000)
Equity infusion from reverse recapitalization, net of transaction costs	175,700,000					175,700,000
Equity infusion from reverse recapitalization, net of transaction costs, shares					21,911,359
Shares issued upon settlement of equity-linked incentive plan	3,100,000					3,100,000
Shares issued upon settlement of equity-linked incentive plan, shares					300,000
Disgorgement of short swing profits	1,600,000					1,600,000
Share based compensation	3,200,000					3,200,000
Share based compensation, Share					390,000
Repurchases of common stock	(5,900,000)									$ (5,900,000)
Repurchases of common stock, Share					(390,000)
Balance at Sep. 30, 2020	114,700,000					183,600,000		(63,000,000)		(5,900,000)
Balance, shares at Sep. 30, 2020					29,511,359
Balance at Jul. 01, 2020	114,200,000					180,400,000		(63,300,000)		(2,900,000)
Balance, shares at Jul. 01, 2020					29,511,359
Net income (loss)	300,000							300,000
Share based compensation	3,200,000					3,200,000
Share based compensation, Share					390,000
Repurchases of common stock	(3,000,000)									(3,000,000)
Repurchases of common stock, Share					(390,000)
Balance at Sep. 30, 2020	$ 114,700,000					$ 183,600,000		$ (63,000,000)		$ (5,900,000)
Balance, shares at Sep. 30, 2020					29,511,359

CONSOLIDATED STATEMENTS OF ST_2

CONSOLIDATED STATEMENTS OF STOCKHOLDER'S EQUITY (DEFICIT) (Parenthetical)	12 Months Ended
	Dec. 31, 2019USD ($)
Statement of Stockholders' Equity [Abstract]
Net of offering costs	$ 3,534,723

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - 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
OPERATING ACTIVITIES
Net income (loss)	$ 300,000	$ (27,400,000)	$ (20,800,000)	$ (29,600,000)	$ 8,853	$ (1,142)
Adjustments to reconcile net loss to net cash flows provided by operating activities:
Depreciation and amortization			51,600,000	34,900,000
Interest earned on investments held in Trust Account					(2,248,591)
Amortization of debt discount and debt issuance costs			1,200,000	800,000
Inventory obsolescence			1,300,000	600,000
Gain on sale of rental equipment			(6,500,000)	(3,700,000)
Provision for bad debt			2,800,000	1,300,000
Loss on debt extinguishment			7,600,000
(Repayment) accrual of paid-in-kindinterest			(11,200,000)	4,700,000
Change in fair value of warrants		28,300,000		28,300,000
Share-based payment			6,300,000
Changes in deferred taxes			(3,400,000)
Changes in:
Accounts receivable			6,200,000	(14,200,000)
Prepaid expenses					(178,037)
Inventories			(102,800,000)	(53,200,000)
Accounts payable					1,561,966
Proceeds from sale of rental equipment			48,200,000	26,800,000
Payable to related party					91,362	800
Prepaid expenses and other assets			(5,500,000)	(1,300,000)
Income taxes payable					309,000
Proceeds from floor plans with manufacturers			240,500,000	183,100,000
Payments under floor plans with manufacturers			(273,100,000)	(188,400,000)
Accounts payable, accrued expenses, customer deposits, and other current liabilities			16,000,000	5,100,000
Leases and other liabilities			(3,100,000)	800,000
Net cash used in operating activities			(44,700,000)	(4,000,000)	(455,447)	(342)
Cash flows from investing activities:
Proceeds from the sale of assets			1,000,000
Proceeds deposited in Trust Account					(143,750,000)
Expenditures for rental equipment			(34,500,000)	(18,000,000)
Expenditures for property and equipment			(4,000,000)	(2,100,000)
Expenditures for acquisitions, net of cash acquired			(128,800,000)	(65,600,000)
Net activity on notes and land contract receivable				100,000
Net cash used in investing activities			(166,300,000)	(85,600,000)	(143,750,000)
Cash flows from financing activities:
Expenditures for debt issuance costs			(2,700,000)	(100,000)
Proceeds from note payable - related party					19,750	50,000
Extinguishment of floor plans and line of credit			(132,900,000)
Repayment of note payable - related party					(69,750)
Extinguishment of long-term debt			(82,000,000)
Proceeds from sale of Units in Public Offering					143,750,000
Redemption of former shareholder notes payable			(6,700,000)
Proceeds from sale of Units in Private Placement					4,625,000
Extinguishment of warrant liability			(29,600,000)
Payment of underwriting discounts					(2,875,000)
Proceeds from lines of credit			334,500,000	137,400,000
Payment of offering costs					(639,723)
Payments under lines of credit			(187,100,000)	(88,000,000)
Proceeds from floor plans with unaffiliated source			63,500,000	81,400,000
Payments under floor plans with unaffiliated source			(61,300,000)	(50,700,000)
Proceeds from issuance of long-term debt, net			149,400,000	20,000,000
Payments on long-term debt			(4,800,000)	(9,100,000)
Payments on capital lease obligations			(600,000)	(700,000)
Equity proceeds from reverse recapitalization, net			175,700,000
Proceeds from disgorgement of short swing profits			1,600,000
Repurchases of common stock			(5,900,000)
Net cash provided by financing activities			211,100,000	90,200,000	144,810,277	50,000
NET CHANGE IN CASH			100,000	600,000	604,830	49,658
Cash, Beginning of year			654,488	1,500,000	1,500,000
Cash, End of period	$ 100,000	$ 2,100,000	100,000	2,100,000	654,488	1,500,000
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Cash paid for interest			$ 26,000,000	9,700,000
Taxes paid					800	800
Previously Reported
Cash flows from financing activities:
Cash, Beginning of year				$ 49,658	$ 49,658
Cash, End of period						$ 49,658

ORGANIZATION AND NATURE OF BUSI

ORGANIZATION AND NATURE OF BUSINESS OPERATIONS	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Organization Consolidation And Presentation Of Financial Statements Abstract
ORGANIZATION AND NATURE OF BUSINESS OPERATIONS	NOTE 1 — ORGANIZATION AND NATURE OF OPERATIONS Alta Equipment Group, Inc. (formerly known as B. Riley Principal Merger Corp.) (individually or as sometimes collectively together with its direct and indirect subsidiaries referred to herein as the “Company”), was incorporated in Delaware on October 30, 2018 as a blank check company for the purpose of effecting a merger, share exchange, asset acquisition, share purchase, recapitalization, reorganization or other similar business combination with one or more businesses or entities. On February 14, 2020, the Company consummated a reverse recapitalization pursuant to which the Company acquired Alta Equipment Holdings, Inc. pursuant to an agreement and plan of merger between the Company, BR Canyon Merger Sub Corp., a Delaware corporation and wholly-owned subsidiary of the Company (“Merger Sub”), Alta Equipment Holdings, Inc. and Ryan Greenawalt. This business merger will be referred to as “reverse recapitalization” throughout this document. In connection with the reverse recapitalization, Merger Sub merged with and into Alta Equipment Holdings, Inc., with Alta Equipment Holdings, Inc. surviving the reverse recapitalization as a direct, wholly owned subsidiary of the Company, and the Company changed its name from B. Riley Principal Merger Corp. to Alta Equipment Group, Inc. The Company and Alta Equipment Holdings, Inc. are the holding companies for Alta Enterprises, LLC. Alta Enterprises, LLC is the holding company for Alta Industrial Equipment Michigan; LLC; Alta Industrial Equipment Company, LLC; Alta Industrial Equipment New York, LLC; Alta Construction Equipment, LLC; Alta Construction Equipment Illinois, LLC; Alta Heavy Equipment Services, LLC; NITCO, LLC; Alta Construction Equipment Florida, LLC, and PeakLogix, LLC. The Company is engaged in the retail sale, service, and rental of lift trucks and construction equipment in the states of Michigan, Illinois, Indiana, Virginia and Florida as well as the Northeastern part of the United States. Unless the context otherwise requires, the use of the terms “the Company”, “we,” “us,” and “our” in these notes to the unaudited consolidated financial statements refers to Alta Equipment Group Inc. and its consolidated subsidiaries.	NOTE 1 — ORGANIZATION AND NATURE OF BUSINESS OPERATIONS Organization and General B. Riley Principal Merger Corp. (the “Company”), a blank check corporation, was incorporated as a Delaware corporation on October 30, 2018. The Company is an emerging growth company, as defined in Section 2(a) of the Securities Act of 1933, as amended, (the “Securities Act”), as modified by the Jumpstart Our Business Startups Act of 2012 (the “JOBS Act”). On November 14, 2018, GA International Services Corp. (“GA International”), a California corporation, owned by Great American Group, LLC (“Great American”), a wholly owned subsidiary of B. Riley Financial, Inc. (“B. Riley Financial”), merged into the Company. GA International operated as GA International Services, LLC, a former California limited liability company, from the date of its incorporation on October 9, 2012 through November 5, 2018, the date it was converted from a limited liability company to a California corporation. All of the membership interests in GA International Services, LLC were issued to Great American in 2012. The Company was formed for the purpose of effecting a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or similar business combination with one or more businesses (an “Initial Business Combination”). All activity of the Company includes the activity of GA International as if GA International, which was owned by the Company from inception and activity related to the initial public offering on April 11, 2019 (the “Public Offering”) described below and evaluating prospective acquisition targets for an Initial Business Combination. The Company will not generate any operating revenues until after completion of its Initial Business Combination, at the earliest. The Company will generate non-operating non-operating Public Offering The Company completed the sale of 12,500,000 Units at an offering price of $10.00 per unit through the Public Offering. B. Riley Principal Sponsor Co., LLC (the “Sponsor”), a Delaware limited liability company, was incorporated on October 11, 2018 as a wholly owned indirect subsidiary of B. Riley Financial. The Sponsor subscribed to purchase an aggregate of 425,000 Units at a price of $10.00 per unit (the “Private Placement Unit”) in a private placement that closed on April 11, 2019 simultaneously with the Public Offering. The sale of the 12,500,000 Units generated gross proceeds of $125,000,000, less underwriting commissions of $2,500,000 (2% of gross proceeds) and other offering costs of $639,723. The Private Placement Units generated $4,250,000 of proceeds. Each unit consists of one share of the Company’s Class A common stock, $0.0001 par value (each a “public share”), and one-half The Company granted the underwriters a 45-day Note Payable — Related Party On November 16, 2018, the Sponsor agreed to loan the Company up to $300,000 (see Note 3) to support the Company’s initial formation and operations. At December 31, 2018, $50,000 was outstanding on the loan and such loan was repaid using proceeds from the Public Offering on April 12, 2019. The Trust Account Upon completion of the Public Offering and issuance of the Overallotment Units, $143,750,000 of proceeds were deposited in the Trust Account to be invested only in U.S. government treasury bills with a maturity of 180 days or less or in money market funds registered under the Investment Company Act and compliant with Rule 2a-7 Except with respect to interest earned on the funds held in the Trust Account that may be released to the Company to pay its taxes, the proceeds from the Public Offering may not be released from the Trust Account until the earliest of: (i) the completion of the Initial Business Combination; (ii) the redemption of any public shares properly tendered in connection with a stockholder vote to amend the Company’s amended and restated certificate of incorporation to modify the substance or timing of the Company’s obligation to redeem 100% of its public shares if it does not complete the Initial Business Combination within 18 months from the closing of the Public Offering; or (iii) the redemption of all of the Company’s public shares if the Company is unable to complete the Initial Business Combination within 18 months from the closing of the Public Offering (at which such time up to $100,000 of interest shall be available to the Company to pay dissolution expenses), subject to applicable law. The proceeds deposited in the Trust Account could become subject to the claims of the Company’s creditors, if any, which could have priority over the claims of the Company’s public stockholders. Initial Business Combination The Company’s management has broad discretion with respect to the specific application of the net proceeds of the Public Offering, although substantially all of the net proceeds of the Public Offering and the Private Placement are intended to be generally applied toward consummating an Initial Business Combination. The Initial Business Combination must occur with one or more businesses or assets with a fair market value equal to at least 80% of the assets held in the Trust Account less taxes payable on interest earned on the Trust Account. There is no assurance that the Company will be able to successfully effect an Initial Business Combination. The Company, after signing a definitive agreement for an Initial Business Combination, provided its public stockholders with the opportunity to redeem all or a portion of their shares upon the completion of the Initial Business Combination, either (i) in connection with a stockholder meeting called to approve the business combination or (ii) by means of a tender offer. However, in no event would the Company have redeemed its public shares in an amount that would have caused its net tangible assets to be less than $5,000,001. In such case, the Company would not have proceeded with the redemption of its public shares and the related Initial Business Combination, and instead would have searched for an alternate Initial Business Combination. If the Company was to hold a stockholder vote or there was a tender offer for shares in connection with an Initial Business Combination, a public stockholder would have the right to redeem its shares for an amount in cash equal to its pro rata share of the aggregate amount then on deposit in the Trust Account as of two business days prior to the consummation of the Initial Business Combination, including interest but less taxes payable. As a result, such shares of Class A common stock have been recorded at redemption amount and classified as temporary equity upon the completion of the Public Offering, in accordance with the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 480, “Distinguishing Liabilities from Equity.” See Note 6 — Subsequent Events for the redemption amount. Pursuant to the Company’s amended and restated certificate of incorporation, if the Company had been unable to complete the Initial Business Combination within 18 months from the closing of the Public Offering, the Company would (i) cease all operations except for the purpose of winding up, (ii) as promptly as reasonably possible but no more than ten business days thereafter redeem the public shares, at a per-share Letter Agreement The Company’s Sponsor, officers and directors have entered into a letter agreement with the Company, pursuant to which they have agreed, among other things (a) to waive their redemption rights with respect to any Founder Shares, Private Placement Shares and any Public Shares held by them in connection with the completion of the Initial Business Combination, (b) to waive their redemption rights with respect to their Founder Shares, Private Placement Shares and public shares in connection with a stockholder vote to approve an amendment to the Company’s amended and restated certificate of incorporation to modify the substance or timing of its obligation to redeem 100% of its public shares if it does not complete an Initial Business Combination within 18 months from the closing of the Public Offering and (c) to vote their Founder Shares and any public shares purchased during or after the Public Offering (including in open market and privately negotiated transactions) in favor of the Initial Business Combination. Forward Purchase Agreement B. Riley Principal Investments, LLC (“BRPI”), a Delaware limited liability company and an affiliate of the Sponsor, entered into a forward purchase agreement with the Company to provide for the purchase by it (or its designees) of an aggregate of 2,500,000 units at $10.00 per unit for an aggregate purchase price of $25,000,000 in a private placement to close concurrently with the closing of the Initial Business Combination. The proceeds from the sale of the forward purchase units were available to be used as part of the consideration to the sellers in the Initial Business Combination, to pay expenses in connection with the Initial Business Combination or for working capital in the post-business combination company. The forward purchase was required to be made regardless of whether any Class A common stock was redeemed by the Company’s public stockholders and was intended to provide the Company with a minimum funding level for the Initial Business Combination. The forward purchaser did not have the ability to approve the Initial Business Combination prior to the signing of a material definitive agreement. The forward purchase units were issued only in connection with the closing of the Initial Business Combination. The Sponsor and the Company’s officers and directors have entered into a letter agreement with the Company, pursuant to which they have agreed to waive their rights to liquidating distributions from the Trust Account with respect to any Founder Shares and Private Placement Shares held by them if the Company fails to complete the Initial Business Combination within 18 months of the closing of the Public Offering. However, if the Sponsor or any of the Company’s directors or officers acquires shares of Class A common stock in or after the Public Offering, they are entitled to liquidating distributions from the Trust Account with respect to such shares if the Company fails to complete the Initial Business Combination within the prescribed time period. In the event of a liquidation, dissolution or winding up of the Company after an Initial Business Combination, the Company’s remaining stockholders are entitled to share ratably in all assets remaining available for distribution to them after payment of liabilities and after provision is made for each class of stock, if any, having preference over the common stock. The Company’s stockholders have no preemptive or other subscription rights. There are no sinking fund provisions applicable to the common stock, except that the Company will provide its stockholders with the opportunity to redeem their public shares for cash equal to their pro rata share of the aggregate amount then on deposit in the Trust Account, under the circumstances, and, subject to the limitations, described herein. On February 14, 2020, BRPI purchased 2,500,000 units at $10.00 per unit for an aggregate purchase price of $25,000,000 in a private placement concurrently with the close of the Initial Business Combination.

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 unaudited interim consolidated financial statements include the consolidated accounts of the Company and have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). All significant intercompany transactions and balances have been eliminated in the preparation of the consolidated financial statements. Certain amounts in the prior year have been reclassified to conform with the presentation in the current year. The interim financial information is unaudited, but reflects all normal recurring adjustments that are, in the opinion of management, necessary to fairly present the information set forth herein. Operating results for the nine months ended September 30, 2020 is not necessarily indicative of the results that may be expected for the year ending December 31, 2020, and therefore, the results and trends in these interim consolidated financial statements may not be the same for the entire year. These interim consolidated financial statements should be read in conjunction with the annual audited consolidated financial statements and related notes in our Registration Statement on Form S-1, There have been no material changes in the Company’s significant accounting policies as compared to the significant accounting policies described in the Registration Statement. COVID-19 On March 11, 2020, the World Health Organization characterized the outbreak of COVID-19 COVID-19. “stay-at-home” The Company’s response to the global COVID-19 mid-March COVID-19. Despite the Company remaining operational since the second quarter of 2020, certain segments of our customer base were negatively impacted by COVID-19 pre-COVID pre-COVID in-turn, COVID-19’s COVID-19. We believe we have sufficient liquidity to fund our operations as we work through the COVID-19 Use of Estimates The COVID-19 COVID-19 The nature of our business requires that we make estimates and assumptions in accordance with GAAP. These estimates and assumptions affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements, as well as the reported amounts of revenue and expenses during the reporting period. The COVID-19 The Company assessed certain accounting matters that generally require consideration of forecasted financial information in context with the information reasonably available to the Company and the unknown future impacts COVID-19 COVID-19, Impairment of Long-lived Assets The Company evaluates long-lived assets, such as property and equipment and intangible assets subject to amortization, for impairment annually and whenever events or changes in circumstances indicate that the carrying value of any asset group may not be recoverable. If the estimated future cash flow (undiscounted and without interest charges) from the use of an asset are less than the carrying value, a write-down would be recorded to reduce the related asset to its estimated fair value. When reviewing long-lived assets for impairment, the Company groups long-lived assets with other assets and liabilities at the lowest level for which identifiable cash flows are largely independent of the cash flows of other assets and liabilities. After evaluating and weighing all relevant events and circumstances, the Company concluded that it was not necessary to perform an interim impairment test for the long-lived assets as of and for the period ended September 30, 2020. Goodwill Pursuant to the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification Topic 350, Intangibles-Goodwill and Other non-controlling interest The Company evaluates goodwill for impairment at least annually, or more frequently if triggering events occur or other impairment indicators arise which might impair recoverability. Impairment of goodwill is evaluated at the reporting unit level. A reporting unit is defined as an operating segment (i.e. before aggregation or combination), or one level below an operating segment (i.e. a component). A component of an operating segment is a reporting unit if the component constitutes a business for which discrete financial information is available and segment management regularly reviews the operating results of that component. After evaluating and weighing all relevant events and circumstances, the Company concluded there was no triggering event that constitutes the need to perform a goodwill impairment test for the period ended September 30, 2020. It should be noted that at March 31, 2020, the Company’s share price reduction as a result of the ongoing COVID-19 Offering Costs and Transaction Expenses The Company incurred costs directly attributable to its initial public offering, such as underwriter, registration and filing fees along with direct incremental legal, accounting, and professional fees relating to the Business Combination. The Company evaluated all the fees and approximately $2.6 million of expenses were recorded as an offset against proceeds of the reverse recapitalization. As of December 31, 2019, there were $0.7 million deferred as prepaid expenses and other current assets in our accompanying Consolidated Balance Sheets. These were deferred until completion of the reverse recapitalization, at which time $0.4 million were reclassified to additional paid-in Income Taxes The Company is a newly formed corporation for the income tax purposes. Alta Enterprises, LLC was historically and remains a partnership for federal income tax purposes, with each partner being separately taxed on its share of taxable income (loss). There is no federal income tax expense (benefit) reflected in the Company’s financial statements for any period prior to the reverse recapitalization on February 14, 2020. As the activity resides in Alta Enterprises, LLC, the income tax impact to the Company represents the current income tax calculated at the Consolidated Return level, (“Alta Equipment Group, Inc and Subsidiaries”), and the deferred impact of the interest in the lower tier partnership. When looking at the Consolidated Return filer, and considering the operating entity is a 100% owned partnership, the Company uses the guidance in FASB ASC Topic 740 — Income Taxes, asset and liability method of accounting for income taxes, under which deferred tax assets and liabilities are recognized for the future tax consequences of (i) temporary differences between the financial statement carrying amounts and the tax bases of existing assets and liabilities and (ii) operating loss and tax credit carryforwards. Deferred income tax assets and liabilities are based on enacted tax rates applicable to the future period when those temporary differences are expected to be recovered or settled. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income in the period the rate change is enacted. Deferred income tax assets are subject to valuation allowance considerations to recognize only amounts that are more likely than not to be ultimately realized. Equity and Warrants In conjunction with the reverse recapitalization, the Company made changes to its capital stock. The Company’s Amended and Restated Certificate of Incorporation authorizes the issuance of 201,000,000 shares of capital stock, consisting of (i) 200,000,000 shares of common stock, (the “Common Stock”) and (ii) 1,000,000 shares of preferred stock, par value $0.0001 per share. As of September 30, 2020, no shares of preferred stock authorized have been issued. As a result of the reverse recapitalization, the shares issued to Alta Equipment Holdings, Inc. shareholders in connection with the transaction are reflected as if they were issued and outstanding beginning on January 1, 2019. As of September 30, 2020, there were warrants outstanding to acquire 8,668,750 shares of the Company’s Common Stock. These warrants were issued in connection with the equity infusion related to reverse recapitalization. The Warrants entitle the registered holder to purchase one share of our Class A Common Stock at a price of $11.50 per share, subject to certain adjustments. The warrants will expire five years after the completion of our initial reverse recapitalization or earlier upon redemption or liquidation. Share Based Compensation The Board of Directors approved the Company’s 2020 Omnibus Incentive Plan, which enables the Company to grant stock options, stock appreciation rights, restricted stock, restricted stock units, unrestricted stock, other share based awards and cash awards to directors, employees and consultants to improve the ability of the Company to attract, retain, and motivate individuals upon whom the Company’s sustained growth and financial success depend, by providing such persons with an opportunity to acquire or increase their proprietary interest in the Company. We measure the employee stock-based awards at grant-date fair value using provisions of ASC 718 — Stock Compensation and record compensation expense over the vesting period of the award. The Company made an accounting election upon adoption of Accounting Standard Update (“ASU”) 2016-09 non-employee 2018-07. New Accounting Pronouncements Recent Accounting Pronouncements Adopted in 2020 Fair Value Measurement — Disclosure Framework (Topic 820) In August 2018, the FASB issued ASU No. 2018-13, Pronouncements Not Yet Adopted Leases (Topic 842) In February 2016, the FASB issued ASU No. 2016-02, Leases right-of-use (“ROU”) The Company is still assessing the impact Topic 842 will have on its future revenue and expenses. The new accounting standard is effective for the annual reporting period ended December 31, 2022 with an effective date of January 1, 2022, and the interim reporting periods beginning January 1, 2023. Early adoption is permitted. Management is currently assessing the impact the adoption of this standard will have on the Company’s consolidated financial statements as well as the available transition methods. Financial Instruments — Credit Losses (Topic 326) In June 2016, the FASB issued ASU 2016-13, Financial Instruments — Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments 2016-13”). Measurement of expected credit losses is to be based on relevant forecasts that affect collectability. The scope of financial assets within the CECL methodology is broad and includes trade receivables from certain revenue transactions and certain off-balance sheet 2019-10, 2016-13 is 2016-13 will 2016-13 does non-operating lease	NOTE 2 — SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of Presentation The financial statements of the Company are presented in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”). Emerging Growth Company Section 102(b)(1) of the JOBS Act exempts emerging growth companies from being required to comply with new or revised financial accounting standards until private companies (that is, those that have not had a Securities Act registration statement declared effective or do not have a class of securities registered under the Exchange Act) are required to comply with the new or revised financial accounting standards. The JOBS Act provides that a company can elect to opt out of the extended transition period and comply with the requirements that apply to non-emerging Income (Loss) Per Common Share Income (loss) per share is computed by dividing net income (loss) by the weighted average number of shares of common stock outstanding for the period. The Company applies the two-class Reconciliation of Income (Loss) Per Common Share The Company’s net income is adjusted for the portion of income that is attributable to shares of common stock subject to possible redemption, as these shares only participate in the earnings of the Trust Account and not the income or losses of the Company. Accordingly, basic and diluted income (loss) per share is calculated as follows: Year Ended December 31, 2019 2018 Net income (loss) $ 8,853 $ — Less: Income attributable to common stock subject to possible redemption (1,676,357 ) — Adjusted net loss $ (1,667,504 ) $ — Weighted average shares outstanding, basic and diluted 2,961,370 3,125,000 Basic and diluted loss per common share $ (0.56 ) $ (0.00 ) Cash and Cash Equivalents Cash and cash equivalents include cash on hand and on deposit at banking institutions with original maturities of 90 days or less. The Company did not have any cash equivalents as of December 31, 2019 and December 31, 2018. Cash and Marketable Securities held in Trust Account: The amounts held in the Trust Account represent proceeds from the Public Offering, the Private Placement, the Sponsor Loan, and accumulated earnings thereon totaling $2,252,652, of which $145,998,591 were invested in United States treasury obligations with original maturities of six months or less. The remaining $654,488 of proceeds were held in cash and money market mutual funds. These assets can only be used by the Company in connection with the consummation of an initial Business Combination, except that interest earned on the Trust Account can be released to the Company to pay its tax obligations. During the years ended December 31, 2019 and 2018, the Company did not withdraw any funds to pay its tax obligations. Class A Common Stock Subject To Possible Redemption At discussed in Note 1, all of the 14,375,000 shares of Class A common stock sold as part of the Units in the Public Offering contain a redemption feature. In accordance with FASB ASC 480, “Distinguishing Liabilities From Equity,” redemption provisions not solely within the control of the Company require the security to be classified outside of permanent equity. Ordinary liquidation events, which involve the redemption and liquidation of all of the entity’s equity instruments, are excluded from the provisions of FASB ASC 480. Although the Company has not specified a maximum redemption threshold, its amended and restated certificate of incorporation provides that in no event will the Company redeem its public shares in an amount that would cause its net tangible assets to be less than $5,000,001. Concentration of Credit Risk Financial instruments that potentially subject the Company to concentrations of credit risk consist of cash accounts in a financial institution, which, at times, may exceed the Federal Depository Insurance Coverage of $250,000. The Company has not experienced losses on these accounts and management believes the Company is not exposed to significant risks on such accounts. Financial Instruments The fair value of the Company’s assets and liabilities, which qualify as financial instruments under the FASB ASC 820, “Fair Value Measurements and Disclosures,” approximates the carrying amounts represented in the balance sheets, primary due to their short- term nature. Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires the Company’s management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Deferred Offering Costs The Company complies with the requirements of the FASB ASC 340-10-S99-1 Income Taxes The Company is currently taxed as a corporation for U.S. federal income tax purposes. As a corporation, for tax purposes, the Company is subject to U.S. federal and various state and local income taxes on its earnings. For periods prior to April 11, 2019, the date of the Public Offering, the Company was included in the consolidated tax return of B. Riley Financial (the “Parent”). During this period, the Company calculated its tax liability and provision for income taxes by using a “separate return” method. Under this method the Company was assumed to file a separate return with the tax authority, thereby reporting its taxable income or loss and paying the applicable tax to, or receiving the appropriate refund from, the Parent. Following changes in ownership on April 11, 2019, the Company deconsolidated from the Parent for tax purposes. Beginning April 11, 2019, the Company files separate corporate federal and state and local income tax returns. The Company complies with the accounting and reporting requirements of ASC Topic 740 “Income Taxes,” which requires an asset and liability approach to financial accounting and reporting for income taxes. Deferred income tax assets and liabilities are computed for differences between the financial statement and tax bases of assets and liabilities that will result in future taxable or deductible amounts, based on enacted tax laws and rates applicable to the periods in which the differences are expected to affect taxable income. Valuation allowances are established, when necessary, to reduce deferred tax assets to the amount expected to be realized. ASC Topic 740 prescribes a recognition threshold and a measurement attribute for the financial statement recognition and measurement of tax positions taken or expected to be taken in a tax return. For those benefits to be recognized, a tax position must be more-likely-than-not The Company may be subject to potential examination by federal, state and city taxing authorities in the areas of income taxes. These potential examinations may include questioning the timing and amount of deductions, the nexus of income among various tax jurisdictions and compliance with federal, state and city tax laws. The Company’s management does not expect that the total amount of unrecognized tax benefits will materially change over the next twelve months. For the year ended December 31, 2019, the Company recorded income tax expense of $309,000 primarily related to interest income earned on the Trust Account. For the year ended December 31, 2018, the Company recorded income tax expense of $800 related to state income taxes. Unrecognized Tax Benefits The Company recognizes tax positions in the financial statements only when it is more likely than not that the position will be sustained on examination by the relevant taxing authority based on the technical merits of the position. A position that meets this standard is measured at the largest amount of benefit that will more likely than not be realized on settlement. A liability is established for differences between positions taken in a tax return and amounts recognized in the financial statements. There were no unrecognized tax benefits as of December 31, 2019 and December 31, 2018. The Company recognizes accrued interest and penalties related to unrecognized tax benefits as income tax expense. No amounts were accrued for interest expense and penalties related to income tax matters as of December 31, 2019 and December 31, 2018. The Company is subject to income tax examinations by major taxing authorities since inception. Recent Accounting Pronouncements Management does not believe that any recently issued, but not yet effective, accounting pronouncements, if currently adopted, would have a material effect on the Company’s financial statements.

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 4 — RELATED PARTY TRANSACTIONS The Company leases a subset of its operating facilities from three real estate entities related through common ownership. Total rent expense under these lease agreements for both the nine months ended September 30, 2020 and September 30, 2019 was $3.6 million and for both the three months ended September 30, 2020 and September 30, 2019 was $1.2 million.	NOTE 3 — RELATED PARTY TRANSACTIONS Founder Shares In November 2018, upon the completion of the merger of GA International Services Corp. and the Company, 3,593,750 shares of Class B common stock (the “Founder Shares”) were issued to Great American in exchange for all of the common stock of GA International Services Corp. The financial statement reflects the issuance of these shares retroactively for all periods presented. As used herein, unless the context otherwise requires, Founder Shares shall be deemed to include the shares of Class A common stock issuable upon conversion thereof. The Founder Shares are identical to the Class A common stock included in the units sold in the Public Offering, the Founder Shares automatically convert into shares of Class A common stock at the time of the Initial Business Combination and are subject to certain transfer restrictions, as described in more detail below, and the holders of the Founder Shares, as described in more detail below, have agreed to certain restrictions and will have certain registration rights with respect thereto. The number of Founder Shares issued was determined based on the expectation that the Founder Shares would represent 20% of the outstanding shares of common stock upon completion of the Public Offering. The Company’s initial stockholders, officers and directors have agreed, not to transfer, assign or sell any Founder Shares held by them until the earlier to occur of: (i) one year after the completion of the Initial Business Combination, (ii) the last sale price of Class A common stock equals or exceeds $12.00 per share (as adjusted for stock splits, stock dividends, reorganizations, recapitalizations and the like) for any 20 trading days within any 30-trading Business Combination Marketing Agreement The Company engaged B. Riley FBR, Inc. as advisors in connection with its Initial Business Combination to assist it in arranging meetings with its stockholders to discuss a potential business combination and the target business’ attributes, introduce it to potential investors that may be interested in purchasing its securities, assist it in obtaining stockholder approval for its Initial Business Combination and assist it with the preparation of press releases and public filings in connection with the Initial Business Combination. The Company will pay B. Riley FBR, Inc. for such services upon the consummation of the Initial Business Combination a cash fee in an amount equal to 3.5% of the gross proceeds of the Public Offering (exclusive of any applicable finders’ fees which might become payable). Pursuant to the terms of the business combination marketing agreement, the Company paid the cash fee of $5,031,250 and expenses of $102,413 on February 14, 2020, the closing date of the Initial Business Combination. Administrative Fees Commencing on the date of the prospectus, the Company agreed to pay an affiliate of the Sponsor a total of $10,000 a month for office space, utilities and secretarial and administrative support. During the year ended December 31, 2019, the Company was charged a total of $86,333 by the Sponsor. Upon completion of the Company’s Initial Business Combination on February 14, 2020, the Company ceased incurring these monthly fees. Registration Rights The holders of Founder Shares, Private Placement Units, Private Placement Shares, Private Placement Warrants and units that may be issued upon conversion of working capital loans, if any, have registration rights to require the Company to register the resale of any of its securities held by them (in the case of the Founder Shares, only after conversion of such shares to shares of Class A common stock) pursuant to a registration rights agreement. These holders are also entitled to certain piggyback registration rights. However, the registration rights agreement provides that the Company will not permit any registration statement filed under the Securities Act to become effective until termination of the applicable lock-up Note Payable — Related Party On November 16, 2018, the Sponsor agreed to loan the Company up to $300,000 to support the Company’s initial formation and operations. At December 31, 2018, $50,000 was outstanding, respectively, on the loan. Additional borrowings prior to the Public Offering increased the note payable balance to $67,950 and the Company repaid the entire note payable using proceeds from the Public Offering on April 12, 2019. Payable to Related Party The Company also had an amount payable to Great American of $8,279 at December 31, 2019 and 2018. These amounts primarily reflect expenses relating to income taxes and formation expenses that were paid on behalf of the Company by Great American. The Company also had a payable to the Sponsor in the amount of $91,362 at December 31, 2019 as previously discussed above. The $8,279 amount was paid to Great American and the $91,362 amount was paid to the Sponsor on March 16, 2020.

STOCKHOLDERS' EQUITY

STOCKHOLDERS' EQUITY	12 Months Ended
	Dec. 31, 2019
Equity [Abstract]
STOCKHOLDERS' EQUITY	NOTE 4 — STOCKHOLDERS’ EQUITY Common Stock The authorized common stock of the Company includes up to 100,000,000 shares of Class A common stock and 25,000,000 shares of Class B common stock. If the Company enters into an Initial Business Combination, it may (depending on the terms of such an Initial Business Combination) be required to increase the number of shares of Class A common stock which the Company is authorized to issue at the same time as the Company’s stockholders vote on the Initial Business Combination to the extent the Company seeks stockholder approval in connection with the Initial Business Combination. Holders of the Company’s common stock are entitled to one vote for each share of common stock. In connection with the Company’s merger with GA International on November 14, 2018, the Company completed a stock split 1 to 3,593,750 shares of Class B common stock on November 19, 2018. At December 31, 2019 and December 31, 2018, there were 3,593,750 shares of Class B common stock issued and outstanding. Preferred Stock The Company is authorized to issue 1,000,000 shares of preferred stock with such designations, voting and other rights and preferences as may be determined from time to time by the Company’s board of directors. At December 31, 2019 and December 31, 2018, there were no shares of preferred stock issued or outstanding. Warrants Warrants may only be exercised for a whole number of shares. No fractional Warrants will be issued upon separation of the units and only whole Warrants will trade. The Warrants will become exercisable on the later of (a) 30 days after the completion of the Initial Business Combination or (b) 12 months from the closing of the Public Offering; provided in each case that the Company has an effective registration statement under the Securities Act covering the shares of Class A common stock issuable upon exercise of the Warrants and a current prospectus relating to them is available (or the Company permits holders to exercise their Warrants on a cashless basis and such cashless exercise is exempt from registration under the Securities Act). The Company will as soon as practicable, but in no event later than 15 business days, after the closing of the Initial Business Combination, use its best efforts to file with the Securities and Exchange Commission (“SEC”) a registration statement for the registration, under the Securities Act, of the shares of Class A common stock issuable upon exercise of the Warrants, to cause such registration statement to become effective within 60 business days after the closing of the Initial Business Combination and to maintain a current prospectus relating to those shares of Class A common stock until the warrants expire or are redeemed, as specified in the warrant agreement. If the shares issuable upon exercise of the warrants are not registered under the Securities Act by the 60th business day after the closing of the Initial Business Combination, the Company will be required to permit holders to exercise their warrants on a “cashless basis” in accordance with Section 3(a)(9) of the Securities Act or another exemption. Notwithstanding the above, if the Company’s Class A common stock is at the time of any exercise of a warrant not listed on a national securities exchange such that it satisfies the definition of a “covered security” under Section 18(b)(1) of the Securities Act, the Company may, at its option, require holders of Warrants who exercise their warrants to do so on a “cashless basis” in accordance with Section 3(a)(9) of the Securities Act and, in the event the Company elects, the Company will not be required to file or maintain in effect a registration statement, but the Company will use its best efforts to register or qualify the shares under applicable blue sky laws to the extent an exemption is not available. The Warrants will expire five years after the completion of a Business Combination or earlier upon redemption or liquidation. The Company may call the Warrants for redemption (except with respect to the Private Placement Warrants): • in whole and not in part; • at a price of $0.01 per warrant; • upon a minimum of 30 days’ prior written notice of redemption (the “30-day • if, and only if, the last sale price of the Class A common stock equals or exceeds $18.00 per share (as adjusted for stock splits, stock dividends, reorganizations, recapitalizations and the like) for any 20 trading days within a 30-trading If the Company calls the Warrants for redemption, management will have the option to require all holders that wish to exercise the Warrants to do so on a “cashless basis,” as described in the warrant agreement. The exercise price and number of shares of Class A common stock issuable upon exercise of the warrants may be adjusted in certain circumstances including in the event of a share dividend, or recapitalization, reorganization, merger or consolidation. In addition, if (x) the Company issues additional shares of Class A common stock or securities convertible into or exercisable or exchangeable for shares of Class A common stock for capital raising purposes in connection with the closing of the Initial Business Combination (excluding any issuance of securities under the Forward Purchase Agreement), at an issue price or effective issue price of less than $9.20 per share of Class A common stock (with such issue price or effective issue price to be determined in good faith by the Company’s board of directors and, in the case of any such issuance to the Sponsor or its affiliates, without taking into account any Founder Shares held by the Sponsor or such affiliates, as applicable, prior to such issuance (the “Newly Issued Price”)), (y) the aggregate gross proceeds from such issuances represent more than 60% of the total equity proceeds, and interest thereon, available for funding the Initial Business Combination, and (z) the volume weighted average trading price of the Class A common stock during the 20 trading day period starting on the trading day prior to the day on which the Company consummates the Initial Business Combination (the “Market Value”) is below $9.20 per share, the exercise price of the warrants will be adjusted (to the nearest cent) to be equal to 115% of the higher of the Market Value and the Newly Issued Price, and the $18.00 per share redemption trigger price described above will be adjusted (to the nearest cent) to be equal to 180% of the higher of the Market Value and the Newly Issued Price. Additionally, in no event will the Company be required to net cash settle any warrant. In the event that a registration statement is not effective for the exercised warrants, the purchaser of a unit containing such warrant will have paid the full purchase price for the unit solely for the share of Class A common stock underlying such unit. There will be no redemption rights or liquidating distributions with respect to the warrants, which will expire worthless if the Company fails to complete an Initial Business Combination within the 18-month The Private Placement Warrants are identical to the Warrants underlying the units sold in the Public Offering, except that the Private Placement Warrants and the shares of Class A common stock issuable upon exercise of the Private Placement Warrants will not be transferable, assignable or salable until 30 days after the completion of the Initial Business Combination, subject to certain limited exceptions. Additionally, the Private Placement Warrants will be non-redeemable

FAIR VALUE INSTRUMENTS

FAIR VALUE INSTRUMENTS	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Fair Value Disclosures [Abstract]
FAIR VALUE INSTRUMENTS	NOTE 14 — FAIR VALUE INSTRUMENTS The carrying value of financial instruments reported in the accompanying Consolidated Balance Sheets for cash, accounts receivable, accounts payable and accrued expenses payable and other liabilities approximate fair value due to the immediate or short-term nature or maturity of these financial instruments. Based upon current borrowing rates with similar maturities, which are Level 2 fair value inputs, the carrying value of lines of credit, long-term debt, and the guaranteed purchase obligations approximates the fair value as of September 30, 2020 and December 31, 2019. The following is a description of the valuation methodologies used for assets and liabilities measured at fair value on a recurring basis: The Company granted warrants to purchase 33,333.33 shares of common units in connection with the stock purchase and redemption that occurred on December 27, 2017. The warrants had an exercise price of $0.01 and included a conditional put option, allowing the holder to require the Company to purchase the outstanding warrants, via a settlement upon the following events: (1) upon 75% repayment of senior indebtedness, (2) change in control from a sale transaction, and (3) the maturity of the related debt, which required the Company to settle the warrants in cash. The warrants were to expire December 27, 2027. The warrants also included a limited call right, where in the event of a sale transaction, the Company had the right to redeem, in cash, all the warrants simultaneously at the per common share price equal to the price set for the sale transaction. On February 14, 2020, the Company consummated its reverse recapitalization. The Company recorded the warrants issued based on the fair value at the date of grant and re-measured at The preceding methods described produced a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. Furthermore, although management believed its valuation methods to be appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could have resulted in a different fair value measurement at the reporting date. The Company redeemed all the warrants outstanding upon closing of the reverse recapitalization on February 14, 2020 and as of September 30, 2020, there were no warrant liabilities on the Consolidated Balance Sheet. Contingent Consideration The contingent consideration liability represents the fair value of the future earn-out earn-out PeakLogix LLC (“PeakLogix”) The purchase agreement for the PeakLogix acquisition provides for earn-out earn-out earn-out earn-out earn-out The Company concluded the future minimum cash payments of $2.0 million will be treated as a non-contingent In addition to the non-contingent Hilo Equipment & Services (“Hilo”) The purchase agreement for the Hilo acquisition provides for one additional earn-out earn-out The following table sets forth, by level of hierarchy, the provisional fair value of contingent liability for the earn-out September 30, 2020 Level 1 Level 2 Level 3 Liabilities: Contingent consideration $ — $ — $ 1.8	NOTE 5 — FAIR VALUE INSTRUMENTS The Company follows the guidance in ASC 820 for its financial assets and liabilities that are re-measured non-financial re-measured The fair value of the Company’s financial assets and liabilities reflects management’s estimate of amounts that the Company would have received in connection with the sale of the assets or paid in connection with the transfer of the liabilities in an orderly transaction between market participants at the measurement date. In connection with measuring the fair value of its assets and liabilities, the Company seeks to maximize the use of observable inputs (market data obtained from independent sources) and to minimize the use of unobservable inputs (internal assumptions about how market participants would price assets and liabilities). The following fair value hierarchy is used to classify assets and liabilities based on the observable inputs and unobservable inputs used in order to value the assets and liabilities: Level 1: Quoted prices in active markets for identical assets or liabilities. An active market for an asset or liability is a market in which transactions for the asset or liability occur with sufficient frequency and volume to provide pricing information on an ongoing basis. Level 2: Observable inputs other than Level 1 inputs. Examples of Level 2 inputs include quoted prices in active markets for similar assets or liabilities and quoted prices for identical assets or liabilities in markets that are not active. Level 3: Unobservable inputs based on our assessment of the assumptions that market participants would use in pricing the asset or liability. There were no assets measure on a recurring basis at fair value at December 31, 2018. At December 31, 2019, there were marketable securities in the amount our $145,998,591 with a fair value hierarchy of Level 1 that was used at valuation inputs by the Company to determine such fair value.

Income Taxes

Income Taxes	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 12 — INCOME TAXES The Company accounts for income taxes under the asset and liability method. Under this method, deferred tax liabilities and assets are determined based on the difference between the financial statement and tax basis of assets and liabilities using enacted rates in effect for the year in which the difference is expected to reverse. Additionally, the impact of changes in the tax rates and laws on deferred taxes, if any, is reflected in the financial statement in the period of enactment. The deferred tax liabilities and assets for the Company represent the difference between the financial statement and tax basis of the partnership interest in Alta Enterprises, LLC. As such, the Company is using the single line item approach. The income tax benefit for the three and nine months ended September 30, 2020 and 2019 consisted of the following: Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Federal taxes-current $ — $ — $ — $ — Federal taxes-deferred 1.4 — 2.6 — State taxes-current — — — — State taxes-deferred 0.5 — 0.8 — $ 1.9 $ — $ 3.4 $ — The Company recorded an income tax benefit of $1.9 million and $0 for the three months ended September 30, 2020 and 2019, income tax benefit of $3.4 million and $0 for the nine months ended September 30, 2020 and 2019, respectively. For the period ended September 30, 2019, the Company was not in existence and therefore does not have a comparable period. The income tax benefit covers the period starting with the reverse recapitalization on February 14, 2020 through the period ended September 30, 2020. The income tax results from the period January 1, 2020 through the day prior to the reverse recapitalization will be recognized by the predecessor. The Company finalized the February 14, 2020 pre-tax pre-tax non-deductible As of September 30, 2020, the Company had $15.6 million of net deferred tax liabilities. As discussed above, this represents the GAAP to tax difference in the basis of the underlying partnership, Alta Enterprises, LLC. This basis difference mirrors the GAAP to tax differences within the partnership, which primarily relate to property and equipment assets and other temporary items where the tax basis differs from the GAAP carrying amounts. On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act (“CARES Act”) was enacted in response to the COVID-19 pre-tax	NOTE 6 — INCOME TAX The income tax provision consists of the following: December 31, December 31, Federal Current $ 309,000 $ — Deferred — — State Current — 800 Deferred — — Change in valuation allowance — — Income tax provision expense $ 309,000 $ 800 A reconciliation of the federal income tax rate to the Company’s effective tax rate at December 31, 2019 and 2018 is as follows: 2019 2018 Statutory federal income tax rate 21.0 % 21.0 % State taxes, net of federal tax benefit 0.0 % (254.9 )% Non-deductible 76.2 % 0 % Income tax provision expense 97.2 % (233.9 )% As of December 31, 2019 and 2018, the Company did not have any U.S. federal and state net operating loss carryovers available to offset future taxable income. In assessing the realization of the deferred tax assets, management considers whether it is more likely than not that some portion of all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which temporary differences representing net future deductible amounts become deductible. Management considers the scheduled reversal of deferred tax liabilities, projected future taxable income and tax planning strategies in making this assessment. At December 31, 2019 and 2018, the Company did not have any deferred taxes. The Company files income tax returns in the U.S. federal jurisdiction in various state and local jurisdictions and is subject to examination by the various taxing authorities. The Company’s tax returns since inception remain open and subject to examination. The Company considers Louisiana to be a significant state tax jurisdiction.

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	NOTE 17 — SUBSEQUENT EVENTS On October 30, 2020, the Company closed its acquisition of all the assets of Howell Tractor and Equipment, LLC. (“Howell”), a privately held heavy equipment dealer serving Northern Illinois and Northwest Indiana. The purchase price consisted of $23.3 million in cash paid at closing, subject to certain adjustments based upon Howell’s net working capital at closing. Additionally, the Company issued 507,143 shares of its common stock in connection with the purchase agreement, yielding a total enterprise value of approximately $23.8 million, excluding approximately $3.4 million of floorplan eligible new equipment inventories.	NOTE 7 — SUBSEQUENT EVENTS On December 12, 2019, the Company entered into the Agreement and Plan of Merger (the “Merger Agreement”) with BR Canyon Merger Sub Corp., a Delaware corporation and wholly owned subsidiary of the Company (“Merger Sub”), Alta Equipment Holdings Inc., a Michigan corporation (“Alta Holdings”) and Ryan Greenawalt (the “Business Combination”). On February 11, 2020, the Business Combination was approved by the stockholders of the Company at the special meeting of stockholders. In connection with the Business Combination, 1,049,036 shares of the Company’s Class A common stock were redeemed at a per share price of approximately $10.14. On February 14, 2020 (the “Closing Date”), the Company consummated the Business Combination, pursuant to which the Company acquired Alta Holdings. In connection with the closing of the business combination (the “Closing”), pursuant to the Merger Agreement, Merger Sub merged with and into Alta Holdings, with Alta Holdings surviving the merger in accordance with the Michigan General Corporation Law as a wholly owned subsidiary of the Company (the “Merger”). Immediately after the Closing, the Company had 29,511,359 shares of common stock outstanding, 16,884,213 of which were held by non-affiliates At the Closing, the Company also consummated the Forward Purchase Agreement and the private placement of 3,500,000 shares of common stock to certain accredited investors in connection with the subscription agreements entered into in connection with the Merger Agreement.

REVENUE RECOGNITION

REVENUE RECOGNITION	9 Months Ended
	Sep. 30, 2020
Revenue from Contract with Customer [Abstract]
REVENUE RECOGNITION	NOTE 3 — REVENUE RECOGNITION Revenues are recognized when control of promised goods or services is transferred to customers in an amount that reflects the consideration the business expects to be entitled to in exchange for those goods or services. Control is transferred when the customer has the ability to direct the use of and obtain the benefits from the goods or services. The majority of the Company’s sales agreements contain performance obligations satisfied at a point in time when control is transferred to the customer. For agreements with multiple performance obligations, which are rare, judgment is required to determine whether performance obligations specified in these agreements are distinct and should be accounted for as separate revenue transactions for recognition purposes. In these types of agreements, the Company generally allocates sales prices to each distinct performance obligation based on the observable selling price. The Company enters into various equipment sales transactions with certain customers, whereby customers purchase equipment from the Company and then lease the equipment to a third party. In some cases, the Company provides a guarantee to repurchase the equipment back at the end of the lease term between the customer and third party lessee at a set residual amount set forth in the initial sales contract or pay the customer for the deficiency, if any, between the sale proceeds received for the equipment and the guaranteed minimum resale value. The Company is precluded from recognizing a sale of equipment if it guarantees the repurchase of the sold equipment back or guarantees the resale value of the equipment to the customer for contracts determined to be operating leases. Rather, these transactions are accounted for in accordance with ASC 840, Lease Accounting The lease liability, with respect to the aforementioned sale transactions, represents the net proceeds upon the equipment’s initial transfer. These amounts, excluding the guaranteed residual value, are recognized into rental revenue on a pro-rata basis The Company also enters into various rental agreements whereby owned equipment is leased to customers. Revenue from the majority of rental agreements is recognized over the term of the agreement in accordance with Topic 840. A rental contract includes rates for daily, weekly or monthly use, and rental revenues are earned on a daily basis as rental contracts remain outstanding. Because the rental contracts can extend across multiple reporting periods, the Company records unbilled rental revenues and deferred rental revenues at the end of each reporting period. Unbilled rental revenues are included as a component of “Accounts receivable” on the Consolidated Balance Sheets. Rental equipment is also purchased outright (“rental conversions”). Rental revenue and revenue attributable to rental conversions, are recognized in “Rental revenue” and “Rental equipment sales” on the Consolidated Statements of Operations, respectively. The Company also enters into contracts with customer where it provides automated equipment installation and system integration services. Revenue from the installation services are recognized over time as the performance obligation is satisfied, determined using the cost-to-cost Deferred Revenue The Company recognizes deferred revenue with respect to service sales, rental agreements and automated equipment installation and system integration services. Deferred revenue with respect to service sales represents the unearned portion of fees related to guaranteed maintenance contracts for customers covering equipment purchased. These amounts are recognized based on an estimated rate at which the services are provided over the life of the contract. The Company also recognizes deferred revenue related to rental agreements. Total deferred revenue relating to service sales agreements, rental agreements and automated equipment installation and system integration services as of September 30, 2020 and December 31, 2019 was $9.8 million and $4.7 million, respectively. Disaggregation of Revenues The following table summarizes the Company’s disaggregated revenues as presented in the Consolidated Statement of Operations for the three months and nine months ended September 30, 2020 and 2019 by revenue type, and by the applicable accounting standard. Three months ended September 30, 2020 Three months ended September 30, 2019 Topic 840 Topic 606 Total Topic 840 Topic 606 Total Revenues: New and used equipment sales $ — $ 97.9 $ 97.9 $ — $ 61.1 $ 61.1 Parts sales — 35.5 35.5 — 22.9 22.9 Service revenue — 35.5 35.5 — 27.3 27.3 Rental revenue 32.2 — 32.2 27.8 — 27.8 Rental equipment sales — 19.5 19.5 — 10.7 10.7 Net revenue $ 32.2 $ 188.4 $ 220.6 $ 27.8 $ 122.0 $ 149.8 Nine months ended September 30, 2020 Nine months ended September 30, 2019 Topic 840 Topic 606 Total Topic 840 Topic 606 Total Revenues: New and used equipment sales $ — $ 275.2 $ 275.2 $ — $ 167.1 $ 167.1 Parts sales — 92.3 92.3 — 60.0 60.0 Service revenue — 94.1 94.1 — 67.2 67.2 Rental revenue 83.4 — 83.4 66.9 — 66.9 Rental equipment sales — 48.2 48.2 — 26.8 26.8 Net revenue $ 83.4 $ 509.8 $ 593.2 $ 66.9 $ 321.1 $ 388.0 The Company believes that the disaggregation of revenues from contracts to customers as summarized above, together with the discussion below, depicts how the nature, amount, timing and uncertainty of its revenues and cash flows are affected by economic factors. Leases revenues (Topic 840) New and used equipment sales: pro-rata basis Rental revenue: Revenues from contracts with customers (Topic 606) Accounting for the different types of revenues pursuant to Topic 606 are discussed below. Substantially all of the Company’s revenues under Topic 606 are recognized at a point in time rather than over time. New and used equipment sales: bill-and-hold arrangements, pick-up by, bill-and-hold arrangements, year-to-date cost-to-cost Parts sales: pick-up by Service revenue: year-to-date Rental equipment sales: pick-up by, Contract costs The Company does not recognize assets associated with the incremental costs of obtaining a contract with a customer that the Company expects to recover (for example, a sales commission). Most of the Company’s revenue is recognized at a point in time or over a period of one year or less, and the Company has used the practical expedient that allows it to recognize the incremental costs of obtaining a contract as an expense when incurred if the amortization period of the asset that the Company otherwise would have recognized is one year or less. The amount of the costs associated with the revenue recognized over a period of greater than one year is insignificant. Receivables and contract assets and liabilities The Company has contract assets associated with contracts with customers. Contracts with customers do not generally result in material amounts billed to customers in excess of recognizable revenue. Deferred revenue associated with service contracts represents the unearned portion of revenue related to guaranteed maintenance contracts for customers covering equipment purchased. These amounts are recognized based on an estimated rate at which the services are provided over the life of the contract. Payment terms The Company’s revenues do not include material amounts of variable consideration under Topic 606. Payment terms may vary by the type of customer, location, and the type of products or services offered. The time between invoicing and when payment is due is not significant, and contracts do not generally include a significant financing component. Contracts with customers do not generally result in significant obligations associated with returns, refunds or warranties. Contract estimates and judgments The Company’s revenues accounted for under Topic 606 generally do not require significant estimates or judgments as the transaction price is generally fixed and clearly stated in the customer contracts. Contracts generally do not include multiple performance obligations, and accordingly do not require estimates of the standalone selling price for each performance obligation. Substantially all of the Company’s revenues are recognized at a point in time and the timing of the satisfaction of the applicable performance obligations is readily determinable. The Company’s revenues under Topic 606 are generally recognized at the time of delivery to, or pick-up by,

INVENTORIES

INVENTORIES	9 Months Ended
	Sep. 30, 2020
Inventory Disclosure [Abstract]
INVENTORIES	NOTE 5 — INVENTORIES The components of inventories, net, consisted of the following (amounts in millions): September 30, December 31, 2020 2019 New equipment $ 153.3 $ 92.8 Used equipment 29.6 18.2 Work in process 4.2 3.3 Parts 37.1 24.8 Gross Inventory $ 224.2 $ 139.1 Inventory reserve (3.1 ) (1.9 ) $ 221.1 $ 137.2 Direct labor of $1.4 million and $1.2 million incurred for open service orders were capitalized and included in work in process at both September 30, 2020 and December 31, 2019. The remaining work in process balances as of September 30, 2020 and December 31, 2019 primarily represent parts applied to open service orders. Rental depreciation expense in connection with our new and used equipment was $0.9 and $2.4 million for the three and nine months ended September 30, 2020 and was $0.2 million and $1.5 million for the three and nine months ended September 30, 2019.

PROPERTY AND EQUIPMENT

PROPERTY AND EQUIPMENT	9 Months Ended
	Sep. 30, 2020
Property, Plant and Equipment [Abstract]
PROPERTY AND EQUIPMENT	NOTE 6 — PROPERTY AND EQUIPMENT Property and equipment, net, consisted of the following (amounts in millions): September 30, December 31, 2020 2019 Rental fleet $ 396.8 $ 285.1 Equipment and leasehold improvements: Machinery and equipment 5.1 3.4 Autos and trucks 6.1 4.6 Leasehold improvements 8.6 7.0 Office equipment 3.0 2.3 Computer equipment 9.2 6.2 Total Cost $ 428.8 $ 308.6 Less: accumulated depreciation and amortization Rental fleet (120.3 ) (100.0 ) Equipment and leasehold improvements and computer equipment (14.8 ) (12.1 ) Total accumulated depreciation and amortization (135.1 ) (112.1 ) $ 293.7 $ 196.5 Total depreciation and amortization on property and equipment was $47.8 million and $33.2 million for the nine months ended September 30, 2020 and 2019 and $19.4 million and $14.0 million for the three months ended September 30, 2020 and 2019, respectively. The Company had assets related to capital leases, which are included in the machinery and equipment balance above. Such assets had gross carrying values totaling $3.9 million and $3.5 million, and accumulated amortization balances totaling $2.1 million and $1.3 million, as of September 30, 2020 and December 31, 2019, respectively. Of the $396.8 million and $285.1 million of gross cost of rental fleet, $15.4 million and $18.4 million were represented by guaranteed purchase obligation (“GPO”) assets as of September 30, 2020 and December 31, 2019, respectively.

GOODWILL

GOODWILL	9 Months Ended
	Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL	NOTE 7 — GOODWILL The following table summarizes the changes in the carrying amount of goodwill in total and by reportable segment as of September 30, 2020 and December 31, 2019 (amounts in millions): Industrial Equipment Construction Equipment Total Balance, December 31, 2019 $ 4.8 $ 3.8 $ 8.6 Additions 6.0 8.2 14.2 Balance, September 30, 2020 $ 10.8 $ 12.0 $ 22.8 See Note 15, Business Combinations for further information.

INTANGIBLE ASSETS

INTANGIBLE ASSETS	9 Months Ended
	Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
INTANGIBLE ASSETS	NOTE 8 — INTANGIBLE ASSETS The gross carrying amount of intangible assets and accumulated amortization as of September 30, 2020 and December 31, 2019 were as follows (amounts in millions): September 30, 2020 December 31, 2019 Gross carrying amount Accumulated amortization Net carrying amount Gross carrying amount Accumulated amortization Net carrying amount Customer relationships $ 24.5 $ (2.4 ) $ 22.1 $ 5.4 $ (2.8 ) $ 2.6 Non-compete 0.7 (0.1 ) 0.6 0.4 (0.3 ) 0.1 Tradenames 1.7 (0.2 ) 1.5 0.7 (0.4 ) 0.3 Total $ 26.9 $ (2.7 ) $ 24.2 $ 6.5 $ (3.5 ) $ 3.0 Amortization of intangible assets were $0.7 million and $1.4 million for the three and nine months ended September 30, 2020 and $0.1 million and $0.2 million for the three and nine months ended September 30, 2019, respectively. The Company concluded there was no triggering event that constitutes the need to perform finite-lived intangible assets for impairment for the period ended September 30, 2020.

LINES OF CREDIT AND FLOOR PLANS

LINES OF CREDIT AND FLOOR PLANS	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
LINES OF CREDIT AND FLOOR PLANS	NOTE 9 — LINES OF CREDIT AND FLOOR PLANS Effective February 14, 2020, the Company amended and restated its credit facility with its first lien lender by entering into the Fifth Amended and Restated ABL First Lien Credit Agreement (“Amended and Restated Credit Agreement”) and the facility thereunder, the “ABL Facility”) by and among Alta Equipment Group Inc. and the other credit parties named therein, the lenders named therein, JP Morgan Chase Bank, N.A., as Administrative Agent, and the syndication agents and documentation agent named therein. In connection with the Amended and Restated Credit Agreement, the Company amended and restated its floor plan facility with its first lien lender by entering into the Fifth Amended and Restated Floor Plan First Lien Credit Agreement (“Floor Plan Credit Agreement” and the facility thereunder, the “Floor Plan Facility”) by and among Alta Equipment Group Inc. and the other credit parties named therein, the lender JP Morgan Chase Bank, N.A., as Administrative Agent, Sole Bookrunner and Sole Lead Arranger. The Amended and Restated Credit Agreement, among other things, (i) moved the $85 million floor plan financing facility of the Fourth Amended and Restated First Lien Credit Agreement out of syndication and into the Floor Plan Credit Agreement, (ii) increased the total aggregate amount of indebtedness of all floor plans from $220 million to $225 million, (iii) increased the revolving line of credit borrowing capacity from $110 million to $300 million, and (iv) modified certain financial covenants. The Floor Plan Credit Agreement, among other things, (i) modified the floor plan financing facility with its first lien lender from $85 million to $40 million, and (ii) modified certain financial covenants. Line of Credit and Floor Plan — First Lien Lender The Company has an ABL Facility with its first lien holder with advances on the line being supported by eligible accounts receivable, parts, and otherwise unencumbered new and used equipment inventory and rental equipment. The ABL Facility has a maximum borrowing capacity of $300 million and interest cost is the London Interbank Offered Rate (“LIBOR”) plus an applicable margin or the CB Floating Rate, depending on the borrowing. As of September 30, 2020, the Company had an outstanding ABL Facility balance of $140.5 million, excluding unamortized debt issuance costs. The effective interest rate was 2.1% at September 30, 2020. The Company has Floor Plan Facility with its first lien lender to finance new and used inventory and rental fleet equipment. This Floor Plan Facility has a maximum borrowing capacity of $40 million. The interest cost for the first lien lender floor plan facility is LIBOR plus an applicable margin. The effective interest rate at September 30, 2020 was 2.9%. The floor plan is collateralized by substantially all assets of the Company. As of September 30, 2020, the Company had an outstanding balance on their first lien lender floor plan facility of $30.7 million, excluding unamortized debt issuance costs. In relation to information regarding to our former line of credit and floor plans as of December 31, 2019, please refer to the “Lines of Credit and Floor Plans” footnote in our Registration Statement on Form S-1, Original Equipment Manufacturer (“OEM”) Captive Lenders and Suppliers’ Floor Plans The Company has floor plan financing facilities with several OEM captive lenders and suppliers for new and used inventory and rental equipment, each with borrowing capacities ranging from $10 million to $82.0 million. Primarily, the Company utilizes the facilities for purchases of new equipment inventories. Certain floor plans provide for a five to twelve-month interest only or deferred payment periods. In addition, certain floor plans provide for interest and principal free terms at the suppliers’ discretion. The Company routinely sells equipment that is financed under OEM captive lender floor plans prior to the original maturity date of the financing agreement. When this occurs, the related OEM captive lender floor plan payable becomes due to be paid at the time the equipment being financed is sold. With the recent acquisitions, the Company’s floor plan financing facilities with its OEM capital lenders and suppliers were amended to include the new locations and new entities. The floor plan financing facilities are secured by the equipment being financed, and contain operating company guarantees. The interest is LIBOR plus an applicable margin. The effective rates, excluding the favorable effect of interest-subsidies, as of September 30, 2020 ranged from 3.0% to 4.2%. As of September 30, 2020, the Company had an outstanding balance on these floor plans of $124.3 million. The total aggregate amount of indebtedness related to floor plan financing activities (including the first lien lender floor plan) facility cannot exceed $225.0 million at any time. Total borrowings related to floorplan financing as of September 30, 2020 was $155.0 million excluding unamortized debt issuance costs. For the nine months ended and three months ended September 30, 2020 the Company recognized interest expense associated with new equipment financed under its floor plan facilities of $1.8 million and $0.5 million. Maximum borrowings under the floor plans and ABL Facility are limited to $525 million. The total amount outstanding as of September 30, 2020 was $295.5 million, exclusive of debt issuance and deferred financings costs of $1.6 million.

LONG-TERM DEBT

LONG-TERM DEBT	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
LONG-TERM DEBT	NOTE 10 — LONG-TERM In connection with the reverse recapitalization, the Company entered into a new Note Purchase Agreement (the “Term Loan”) dated as of February 3, 2020, for the purposes of, among other things, (i) financing the reverse recapitalization, (ii) financing the acquisitions of Flagler and Liftech; and (iii) providing for the repayment and refinance of a portion of the Company’s prior existing debt. Notes Payable — Senior Lien Holder On December 27, 2017, the Company entered into a Note Purchase Agreement (the “Prior Note Purchase Agreement”) with a lender with an initial note commitment of $40 million, plus an additional delayed draw note commitment of $20 million. On April 31, 2018 and July 31, 2018, the Company borrowed $3.5 million and $5 million, respectively, against the $20 million delayed draw commitment. On May 1, 2019, the Company borrowed an additional $11.5 million against the $20 million delayed draw commitment. The notes were subject to payment-in-kind (PIK) On February 14, 2020, in connection with the reverse recapitalization and in conjunction with entering into the Amended and Restated Credit Agreement and Term Loan, the Company repaid this note payable in full, completely discharging the Company of any obligations to the lender. Subordinated Debt On December 27, 2017, the Company entered into notes payable to former shareholders of Alta Equipment Company, Inc., the Company’s former parent Company. The notes were unsecured, were subject to interest at 5%, with rights subordinated to the first lien lender and second lien lender. During the term of the notes, the Company paid holders’ semi-annual installments of accrued interest but maintained the option to capitalize such accrued interest amounts into the principal sum of each note. The notes were to mature December 2027. On February 14, 2020, in connection with the reverse recapitalization, and in conjunction with entering into the Amended and Restated Credit Agreement and Term Loan, the Company repaid in full the subordinated debt to the former shareholders of Alta Equipment Company and terminated all commitments and discharged all guarantees related to those agreements. As of September 30, 2020, the Company has no subordinated debt on its Consolidated Balance Sheet. Term Loan On February 14, 2020, the Company entered into a Note Purchase Agreement which comprised of a term loan in an aggregate principal amount of $155.0 million with its second priority lien lender through syndication, with an initial maturity date of August 2025. In connection with the new Term Loan, the Company retired the Prior Note Purchase Agreement. The term loan is payable, at the lender’s option, in quarterly installments of $1.9 million plus interest at LIBOR plus 8%. As of September 30, 2020, the effective interest rate was 9.8%. The Term loan is collateralized by substantially all assets of the Company. As of September 30, 2020, outstanding borrowings under the term loan were $151.1 million, which included $6.9 million deferred financing costs and original issue discounts. Notes Payable — OEM Captive Lender On May 9, 2014, the Company entered into a Master Note Agreement with an OEM captive lender. These notes were payable in monthly installments, with interest ranging from 3.29% to 4.99%. The notes were secured by the specific assets financed and were to mature at various dates through October 2024. On February 14, 2020, in connection with the reverse recapitalization, the Company repaid in full the balance of the notes payable to the OEM captive lender. As of September 30, 2020, there were no notes payable to an OEM captive lender on our Consolidated Balance Sheet. Extinguishment of Debt In accordance with ASC Topic No. 470-50, “Debt – Modifications and Extinguishments” The Company’s long-term debt consists of the following (amounts in millions): September 30, December 31, 2020 2019 Term Loan $ 151.1 $ — Senior lien holder — 71.2 OEM captive lender — 14.8 Subordinated debt — 6.7 First lien lender — term loan — 4.3 Subtotal $ 151.1 $ 97.0 Unamortized debt issuance costs (2.0 ) (2.5 ) Debt discount (4.9 ) (0.9 ) Total debt $ 144.2 $ 93.6 Less: Current maturities of long-term debt, net (7.8 ) (7.1 ) Long-term debt, net $ 136.4 $ 86.5 As of September 30, 2020, the Company was in compliance with the financial covenants set forth in its debt agreements. Promissory Note On June 12, 2020, the Company entered into an unsecured promissory note for $1.0 million at an interest rate of 6.0% on the unpaid principal sum in connection with the PeakLogix acquisition. The promissory note is due one year from the date of the acquisition. Due to the short-term nature of the note, the liability was included in “Other current liabilities” on the Consolidated Balance Sheet as of September 30, 2020. Notes Payable — Non-Contingent The Company acquired all the assets of PeakLogix on June 12, 2020. Pursuant to the purchase agreement, Sellers are entitled to additional cash payments of a minimum of $2.0 million through-out 5-year earn-out non-contingent

CONTINGENCIES

CONTINGENCIES	9 Months Ended
	Sep. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
CONTINGENCIES	NOTE 11 — CONTINGENCIES Guarantees As of September 30, 2020, and December 31, 2019, the Company was party to certain contracts in which it guarantees the performance of agreements between various third-party financial institutions. The terms of the guarantees range from three to five years. In the event of a default by a third-party lessee, the Company would be required to pay all or a portion of the remaining unpaid obligations as specified in the contract. The estimated exposure related to these guarantees was $2.6 million and $3.3 million at September 30, 2020 and December 31, 2019, respectively. It is anticipated that the third parties will have the ability to repay the debt without the Company having to honor the guarantee; therefore, no amount has been accrued on the Consolidated Balance Sheets at September 30, 2020 and December 31, 2019. Legal Proceedings During the nine months ended September 30, 2020 and September 30, 2019, various claims and lawsuits, incidental to the ordinary course of business, were pending against the Company. In the opinion of management, after consultation with legal counsel, resolution of these matters is not expected to have a material effect on the Company’s consolidated financial statements.

SHARE BASED COMPENSATION

SHARE BASED COMPENSATION	9 Months Ended
	Sep. 30, 2020
Share-based Payment Arrangement [Abstract]
SHARE BASED COMPENSATION	NOTE 13 — SHARE BASED COMPENSATION During the third quarter 2020, the Compensation Committee of our Board of Directors approved the grant of 690,000 shares of Restricted Stock Units (“RSUs”) to certain directors, officers and employees of the Company under the 2020 Omnibus Incentive Plan. The Company’s plan is to have broad-based, long-term programs intended to attract and retain talented employees and align stockholder and employee interests. We calculated the fair value of the RSUs at grant date based on the closing market price of our common stock at the date of grant. The compensation expense is recognized on a straight-line basis over the requisite vesting period of the award. The Company recognized total compensation expense of $3.2 million for the three months and nine months ended September 30, 2020, respectively. On August 18, 2020, Robert T. Chiles, President of our Construction Group, passed away. Mr. Chiles was the holder of RSUs for 390,000 shares of common stock of the Company, and at his passing these RSU’s became fully vested and converted into 390,000 shares of our common stock. As a result of the immediate vesting of these RSUs, the Company incurred $3.0 million expense. As of September 30, 2020, the total unrecognized compensation expense related to the non-vested The following table shows the number of restricted stock awards that were granted and vested during 2020: Restricted Stock Awards Number of units Weighted average Granted 690,000 $ 7.60 Vested (390,000 ) $ 7.60 Forfeited — $ — As of September 30, 2020 300,000 $ 7.60

BUSINESS COMBINATIONS

BUSINESS COMBINATIONS	9 Months Ended
	Sep. 30, 2020
Business Combinations [Abstract]
BUSINESS COMBINATIONS	NOTE 15 — BUSINESS COMBINATIONS The following table summarizes the net assets acquired from the acquisitions in 2020 (amounts in millions): Flagler Liftech Peak Hilo Martin Total Cash $ 0.4 $ — $ 3.0 $ 2.1 $ — $ 5.5 Accounts receivable 15.1 4.4 4.6 5.5 1.0 30.6 Inventory 37.5 9.6 0.4 4.7 13.2 65.4 Prepaid and other assets 0.5 1.0 0.2 0.2 — 1.9 Property, plant, and equipment 50.7 5.9 0.2 9.2 0.1 66.1 Intangible assets 14.0 0.7 4.6 3.1 — 22.4 Goodwill 6.0 2.0 1.9 2.1 2.2 14.2 Total Assets $ 124.2 $ 23.6 $ 14.9 $ 26.9 $ 16.5 $ 206.1 Floor plan payable (29.0 ) (3.5 ) — (4.4 ) — (36.9 ) Accounts payable (14.0 ) (1.6 ) (1.5 ) (2.8 ) (0.2 ) (20.1 ) Accrued expenses (4.1 ) — (0.1 ) (0.3 ) (0.1 ) (4.6 ) Other current liabilities — (0.1 ) (3.9 ) (0.4 ) — (4.4 ) Other liabilities (1.3 ) — — — — (1.3 ) Total Liabilities $ (48.4 ) $ (5.2 ) $ (5.5 ) $ (7.9 ) $ (0.3 ) $ (67.3 ) Net Assets Acquired $ 75.8 $ 18.4 $ 9.4 $ 19.0 $ 16.2 $ 138.8 Assets acquired net of cash $ 75.4 $ 18.4 $ 6.4 $ 16.9 $ 16.2 $ 133.3 Flagler On February 14, 2020, in connection with the reverse recapitalization, the Company consummated its acquisition of Flagler for a total purchase price of $75.8 million, which was paid out of funds from the closing of the reverse recapitalization. The acquisition has been accounted for as a purchase business combination. Under the purchase method of accounting, the assets acquired, and liabilities assumed have been recorded at the acquisition date at their respective fair values in our consolidated financial statements and may be subject to adjustment pending completion of final valuation. The fair value of accounts receivable was determined based on the acquisition date net book value and an evaluation of amounts deemed recoverable through subsequent collection. The fair value of inventory and property, plant, and equipment were estimated to approximate their respective acquisition date net book values. The Company expects the goodwill recognized to be 100% deductible for income tax purposes. Costs and expenses related to the acquisition have been expensed as incurred in operating expenses. It should be further noted that, upon the acquisition’s close, the Company established additional floorplan borrowings for new equipment on its Floor Plan Facility with its first lien lender in the amount of $1.2 million, for a total enterprise value of $74.2 million net of cash acquired. Liftech On February 14, 2020, in connection with the reverse recapitalization, the Company consummated its acquisition of Liftech for a total purchase price of $18.4 million, which was paid out of funds from the closing of the reverse recapitalization. The acquisition has been accounted for as a purchase business combination. Under the purchase method of accounting, the assets acquired, and liabilities assumed have been recorded at the acquisition date at their respective fair values in our consolidated financial statements and may be subject to adjustment pending completion of final valuation. The fair value of accounts receivable was determined based on the acquisition date net book value and an evaluation of amounts deemed recoverable through subsequent collection. The fair value of inventory and property, plant, and equipment were estimated to approximate their respective acquisition date net book values. The Company expects the goodwill recognized to be 100% deductible for income tax purposes. Costs and expenses related to the acquisition have been expensed as incurred in operating expenses. It should be further noted that, upon the acquisition’s close, the Company established additional floorplan borrowings for new equipment on its Floor Plan Facility with its first lien lender in the amount of $2.5 million, for a total enterprise value of $15.9 million. PeakLogix On June 12, 2020, the Company acquired all the assets of PeakLogix for a total purchase cash consideration of $5.7 million, which was paid out of available funds. Additional consideration includes $1.0 million in an unsecured one-year earn-out through-out 5-year earn-out See Note 10, Long-Term Debt and Note 14, Fair Value Instruments for further information. The acquisition has been accounted for as a purchase business combination. Under the purchase method of accounting, the assets acquired, and liabilities assumed have been recorded at the acquisition date at their respective fair values in our consolidated financial statements and may be subject to adjustment pending completion of final valuation. The fair value of accounts receivable was determined based on the acquisition date net book value and an evaluation of amounts deemed recoverable through subsequent collection. The fair value of property, plant, and equipment were estimated to approximate their respective acquisition date net book values. The Company expects the goodwill recognized to be 100% deductible for income tax purposes. Costs and expenses related to the acquisition have been expensed as incurred in operating expenses. The following table summarizes the components of the purchase price at June 12, 2020: Cash consideration paid* $ 5.7 Promissory Note 1.0 Present value of non-contingent earn-out 1.7 Earn-out 1.0 Total purchase price $ 9.4 * Includes $3.0 million cash acquired as part of the Business Combination Hilo On July 1, 2020, the Company acquired all the assets of Hilo for a total purchase cash consideration of $18.2 million which was paid out of available funds, and potential earn out payments of an additional $1.0 million. The acquisition has been accounted for as a purchase business combination. Under the purchase method of accounting, the assets acquired, and liabilities assumed have been recorded at the acquisition date at their respective fair values in our consolidated financial statements and may be subject to adjustment pending completion of final valuation. The fair value of accounts receivable was determined based on the acquisition date net book value and an evaluation of amounts deemed recoverable through subsequent collection. The fair value of inventory and property, plant, and equipment were estimated to approximate their respective acquisition date net book values. The Company expects the goodwill recognized to be 100% deductible for income tax purposes. Costs and expenses related to the acquisition have been expensed as incurred in operating expenses. It should be further noted that, upon the close of the acquisition, total enterprise value was $16.9 million net of cash acquired. The following table summarizes the component of the purchase price at July 1, 2020: Cash consideration paid* $ 18.2 Earn-out 0.8 Total purchase price $ 19.0 * Includes $2.1 million cash acquired as part of the Business Combination Martin Implement Sales, Inc. (“Martin”) On September 1, 2020, the Company acquired all the assets of Martin for a total purchase price of $16.2 million, which included floorplan eligible new equipment inventories that was paid out of available funds. The estimated fair values of assets acquired, and liabilities assumed are provisional and are based on the information that was available as of the balance sheet date. The Company expects to finalize the valuation and complete the purchase price allocation as soon as practical but no later than one year from the acquisition date. The Company expects the goodwill recognized to be 100% deductible for income tax purposes. Costs and expenses related to the acquisition have been expensed as incurred in operating expenses . It should be further noted that, upon the close of the acquisition, the Company established additional floorplan borrowings for new equipment on its Floor Plan Facility with its first lien lender in the amount of $2.1 million, for a total enterprise value of $14.1 million. Northland Industrial Truck Co., Inc. (“NITCO”) The following table summarizes the net assets acquired from the acquisition in 2019 (amounts in millions): NITCO Accounts receivable $ 13.9 Other current & non-current 0.5 Inventory 35.7 Guaranteed purchase obligation asset 9.7 Property, plant, and equipment 18.8 Identifiable intangible assets 3.3 Goodwill 1.0 Total Assets $ 82.9 Accounts payable (5.2 ) Guaranteed purchase obligation liability (9.7 ) Capital lease obligations (1.3 ) Other liabilities (1.1 ) Total Liabilities $ (17.3 ) Net Assets Acquired $ 65.6 On May 1, 2019, the Company purchased the assets of NITCO, for a total purchase price of $65.6 million. In connection with the purchase, NITCO, LLC was created. The goodwill of $1.0 million arising from the acquisition consists largely of an assembled workforce and is expected to be deductible for income tax purposes. The total balance of goodwill was allocated to the Industrial Equipment segment. The acquisition has been accounted for as a purchase business combination. Under the purchase method of accounting, the assets and liabilities assumed are recorded at the date of acquisition at their respective fair values. The fair value of accounts receivable was determined based on the acquisition date net book value and an evaluation of amounts deemed recoverable through subsequent collection. The fair value of inventory and property, plant, and equipment were estimated to approximate their respective acquisition date net book values. It should be further noted that, upon the close of the acquisition, the Company established additional floorplan borrowings for new equipment on its Floor Plan Facility with its first lien lender, and OEMs, in the amount of $23.5 million, for a total enterprise value of $42.1 million. Pro forma financial information — 2020 The Company completed the Flagler acquisition on February 14, 2020. Therefore, operating results of Flagler are included in the Company’s Consolidated Statement of Operations from February 14, 2020. Pursuant to ASC 805, pro forma disclosures should be reported whenever the year or interim period of the acquisition is presented. The pro forma information below gives effect to the Flagler acquisition as if the acquisition occurred on January 1, 2020. 9 Months ended September 30, 2020 1/1-9/30 1/1-2/14 The Company Flagler Total Total revenues $ 593.2 $ 25.8 $ 619.0 Net loss $ (20.8 ) $ (0.1 ) $ (20.9 ) Pro forma financial information — 2019 The Company completed the NITCO acquisition on May 1, 2019. Therefore, operating results of NITCO are included in the Company’s Consolidated Statement of Operations from May 1, 2019. Pursuant to ASC 805, pro forma disclosures should be reported whenever the year or interim period of the acquisition is presented. Since the NITCO acquisition was completed in the period ended December 31, 2019, the pro forma information below gives effect to the NITCO acquisition as if the acquisition occurred on January 1, 2019. The Company, for this presentation, prorated NITCO pro forma financial information presented in our Registration Statement on Form S-1, 9 Months ended September 30, 2019 3 Months ended September 30, 2019 1/1-9/30 1/1-4/30 1/1-9/30 6/30-9/30 6/30-9/30 The NITCO Flagler Total The Flagler Total Total revenues $ 388.0 $ 45.2 $ 139.8 $ 573.0 $ 149.8 $ 48.4 $ 198.2 Net (loss) income $ (29.6 ) $ 1.0 $ 0.8 $ (27.8 ) $ (27.4 ) $ 2.2 $ (25.2 ) The financial effect of the other acquisitions, individually and in the aggregate, was not material to the consolidated financial statements. As such, pro forma results of operations including other acquisitions have not been presented.

SEGMENTS

SEGMENTS	9 Months Ended
	Sep. 30, 2020
Segment Reporting [Abstract]
SEGMENTS	NOTE 16 — SEGMENTS The Company has two reportable segments: Industrial Equipment and Construction Equipment. The Company’s segments are determined based on management structure, which is organized based on types of products sold, as described in the following paragraph. The operating results for each segment are reported separately to the Company’s Chief Executive Officer to make decisions regarding the allocation of resources, to assess the Company’s operating performance and to make strategic decisions. The Industrial Equipment segment is principally engaged in operations related to the sale, service, and rental of lift trucks in Michigan, Illinois, Indiana and New York, as well as parts of the northeastern United States. As of September 30, 2020, the Industrial Equipment segment included the Liftech, PeakLogix and Hilo acquisitions. The Construction Equipment segment is principally engaged in operations related to the sale, service, and rental of construction equipment in Michigan, Illinois and Florida. As of September 30, 2020, the Construction Equipment segment included the Flagler and Martin acquisitions. The Company retains various unallocated expense items at the general corporate level, which the Company refers to as “Corporate” in the table below. Corporate holds corporate debt and has minor activity all together. For the nine months ended September 30, 2020, Corporate incurred $7.6 million in debt extinguishment fees, $7.6 million in transaction costs and other expenses associated with the reverse recapitalization. During the quarter, Corporate primarily incurred expenses associated with consulting and legal fees related to acquisition costs, shared based compensation expense and interest expense, which were offset with income tax benefit and $8.0 million in income from a life insurance policy on our Construction Group President. The following table presents the Company’s results of operations by reportable segment for the nine months ended September 30, 2020 (amounts in millions): Industrial Equipment Construction Equipment Corporate Total New and used equipment sales $ 152.7 $ 122.5 $ — $ 275.2 Parts sales 43.7 48.6 — 92.3 Service revenue 61.8 32.3 — 94.1 Rental revenue 34.2 49.2 — 83.4 Rental equipment sales 12.3 35.9 — 48.2 Total revenue $ 304.7 $ 288.5 $ — $ 593.2 Interest expense 4.3 7.8 5.6 17.7 Depreciation and amortization 17.0 34.6 — 51.6 Net income (loss) $ 7.9 $ (14.8 ) $ (13.9 ) $ (20.8 ) The following table presents the Company’s results of operations by reportable segment for the three months ended September 30, 2020 (amounts in millions): Industrial Equipment Construction Equipment Corporate Total New and used equipment sales $ 58.7 $ 39.2 $ — $ 97.9 Parts sales 16.7 18.8 — 35.5 Service revenue 23.4 12.1 — 35.5 Rental revenue 12.2 20.0 — 32.2 Rental equipment sales 4.0 15.5 — 19.5 Total revenue $ 115.0 $ 105.6 $ — $ 220.6 Interest expense 1.4 2.7 2.0 6.1 Depreciation and amortization 6.4 14.6 — 21.0 Net income (loss) $ 2.8 $ (8.6 ) 6.1 $ 0.3 The following table presents the Company’s results of operations by reportable segment for the nine months ended September 30, 2019 (amounts in millions): Industrial Equipment Construction Equipment Corporate Total New and used equipment sales $ 98.3 $ 68.8 $ — $ 167.1 Parts sales 35.7 24.3 — 60.0 Service revenue 48.4 18.8 — 67.2 Rental revenue 26.9 40.0 — 66.9 Rental equipment sales 2.5 24.3 — 26.8 Total revenue $ 211.8 $ 176.2 $ — $ 388.0 Interest expense 3.3 6.0 5.8 15.1 Depreciation and amortization 11.6 23.1 — 34.7 Net income (loss) $ 8.0 $ (2.3 ) $ (35.3 ) $ (29.6 ) The following table presents the Company’s results of operations by reportable segment for the three months ended September 30, 2019 (amounts in millions): Industrial Equipment Construction Equipment Corporate Total New and used equipment sales $ 41.5 $ 19.6 $ — $ 61.1 Parts sales 14.3 8.6 — 22.9 Service revenue 20.2 7.1 — 27.3 Rental revenue 12.0 15.8 — 27.8 Rental equipment sales 0.7 10.0 — 10.7 Total revenue $ 88.7 $ 61.1 $ — $ 149.8 Interest expense 1.3 2.1 2.2 5.6 Depreciation and amortization 4.9 9.3 — 14.2 Net income (loss) $ 4.9 $ (1.4 ) (30.9 ) $ (27.4 ) The following table presents the Company’s identified assets by reportable segment for the period ending September 30, 2020 and December 31, 2019 (amounts in millions): September 30, 2020 December 31, 2019 Segment assets: Industrial equipment $ 257.9 $ 207.5 Construction equipment 441.1 246.0 Corporate 0.8 0.7 Total assets $ 699.8 $ 454.2

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]
Basis of Presentation	Basis of Presentation The accompanying unaudited interim consolidated financial statements include the consolidated accounts of the Company and have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). All significant intercompany transactions and balances have been eliminated in the preparation of the consolidated financial statements. Certain amounts in the prior year have been reclassified to conform with the presentation in the current year. The interim financial information is unaudited, but reflects all normal recurring adjustments that are, in the opinion of management, necessary to fairly present the information set forth herein. Operating results for the nine months ended September 30, 2020 is not necessarily indicative of the results that may be expected for the year ending December 31, 2020, and therefore, the results and trends in these interim consolidated financial statements may not be the same for the entire year. These interim consolidated financial statements should be read in conjunction with the annual audited consolidated financial statements and related notes in our Registration Statement on Form S-1, There have been no material changes in the Company’s significant accounting policies as compared to the significant accounting policies described in the Registration Statement.	Basis of Presentation The financial statements of the Company are presented in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”).
Emerging Growth Company		Emerging Growth Company Section 102(b)(1) of the JOBS Act exempts emerging growth companies from being required to comply with new or revised financial accounting standards until private companies (that is, those that have not had a Securities Act registration statement declared effective or do not have a class of securities registered under the Exchange Act) are required to comply with the new or revised financial accounting standards. The JOBS Act provides that a company can elect to opt out of the extended transition period and comply with the requirements that apply to non-emerging
Income (Loss) Per Common Share		Income (Loss) Per Common Share Income (loss) per share is computed by dividing net income (loss) by the weighted average number of shares of common stock outstanding for the period. The Company applies the two-class
Reconciliation of Income (Loss) Per Common Share		Reconciliation of Income (Loss) Per Common Share The Company’s net income is adjusted for the portion of income that is attributable to shares of common stock subject to possible redemption, as these shares only participate in the earnings of the Trust Account and not the income or losses of the Company. Accordingly, basic and diluted income (loss) per share is calculated as follows: Year Ended December 31, 2019 2018 Net income (loss) $ 8,853 $ — Less: Income attributable to common stock subject to possible redemption (1,676,357 ) — Adjusted net loss $ (1,667,504 ) $ — Weighted average shares outstanding, basic and diluted 2,961,370 3,125,000 Basic and diluted loss per common share $ (0.56 ) $ (0.00 )
Cash and Cash Equivalents		Cash and Cash Equivalents Cash and cash equivalents include cash on hand and on deposit at banking institutions with original maturities of 90 days or less. The Company did not have any cash equivalents as of December 31, 2019 and December 31, 2018.
Cash and Marketable Securities held in Trust Account:		Cash and Marketable Securities held in Trust Account: The amounts held in the Trust Account represent proceeds from the Public Offering, the Private Placement, the Sponsor Loan, and accumulated earnings thereon totaling $2,252,652, of which $145,998,591 were invested in United States treasury obligations with original maturities of six months or less. The remaining $654,488 of proceeds were held in cash and money market mutual funds. These assets can only be used by the Company in connection with the consummation of an initial Business Combination, except that interest earned on the Trust Account can be released to the Company to pay its tax obligations. During the years ended December 31, 2019 and 2018, the Company did not withdraw any funds to pay its tax obligations.
Class A Common Stock Subject To Possible Redemption		Class A Common Stock Subject To Possible Redemption At discussed in Note 1, all of the 14,375,000 shares of Class A common stock sold as part of the Units in the Public Offering contain a redemption feature. In accordance with FASB ASC 480, “Distinguishing Liabilities From Equity,” redemption provisions not solely within the control of the Company require the security to be classified outside of permanent equity. Ordinary liquidation events, which involve the redemption and liquidation of all of the entity’s equity instruments, are excluded from the provisions of FASB ASC 480. Although the Company has not specified a maximum redemption threshold, its amended and restated certificate of incorporation provides that in no event will the Company redeem its public shares in an amount that would cause its net tangible assets to be less than $5,000,001.
Concentration of Credit Risk		Concentration of Credit Risk Financial instruments that potentially subject the Company to concentrations of credit risk consist of cash accounts in a financial institution, which, at times, may exceed the Federal Depository Insurance Coverage of $250,000. The Company has not experienced losses on these accounts and management believes the Company is not exposed to significant risks on such accounts.
Financial Instruments		Financial Instruments The fair value of the Company’s assets and liabilities, which qualify as financial instruments under the FASB ASC 820, “Fair Value Measurements and Disclosures,” approximates the carrying amounts represented in the balance sheets, primary due to their short- term nature.
Use of Estimates	Use of Estimates The COVID-19 COVID-19 The nature of our business requires that we make estimates and assumptions in accordance with GAAP. These estimates and assumptions affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements, as well as the reported amounts of revenue and expenses during the reporting period. The COVID-19 The Company assessed certain accounting matters that generally require consideration of forecasted financial information in context with the information reasonably available to the Company and the unknown future impacts COVID-19 COVID-19,	Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires the Company’s management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Deferred Offering Costs		Deferred Offering Costs The Company complies with the requirements of the FASB ASC 340-10-S99-1
Income Taxes	Income Taxes The Company is a newly formed corporation for the income tax purposes. Alta Enterprises, LLC was historically and remains a partnership for federal income tax purposes, with each partner being separately taxed on its share of taxable income (loss). There is no federal income tax expense (benefit) reflected in the Company’s financial statements for any period prior to the reverse recapitalization on February 14, 2020. As the activity resides in Alta Enterprises, LLC, the income tax impact to the Company represents the current income tax calculated at the Consolidated Return level, (“Alta Equipment Group, Inc and Subsidiaries”), and the deferred impact of the interest in the lower tier partnership. When looking at the Consolidated Return filer, and considering the operating entity is a 100% owned partnership, the Company uses the guidance in FASB ASC Topic 740 — Income Taxes, asset and liability method of accounting for income taxes, under which deferred tax assets and liabilities are recognized for the future tax consequences of (i) temporary differences between the financial statement carrying amounts and the tax bases of existing assets and liabilities and (ii) operating loss and tax credit carryforwards. Deferred income tax assets and liabilities are based on enacted tax rates applicable to the future period when those temporary differences are expected to be recovered or settled. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income in the period the rate change is enacted. Deferred income tax assets are subject to valuation allowance considerations to recognize only amounts that are more likely than not to be ultimately realized.	Income Taxes The Company is currently taxed as a corporation for U.S. federal income tax purposes. As a corporation, for tax purposes, the Company is subject to U.S. federal and various state and local income taxes on its earnings. For periods prior to April 11, 2019, the date of the Public Offering, the Company was included in the consolidated tax return of B. Riley Financial (the “Parent”). During this period, the Company calculated its tax liability and provision for income taxes by using a “separate return” method. Under this method the Company was assumed to file a separate return with the tax authority, thereby reporting its taxable income or loss and paying the applicable tax to, or receiving the appropriate refund from, the Parent. Following changes in ownership on April 11, 2019, the Company deconsolidated from the Parent for tax purposes. Beginning April 11, 2019, the Company files separate corporate federal and state and local income tax returns. The Company complies with the accounting and reporting requirements of ASC Topic 740 “Income Taxes,” which requires an asset and liability approach to financial accounting and reporting for income taxes. Deferred income tax assets and liabilities are computed for differences between the financial statement and tax bases of assets and liabilities that will result in future taxable or deductible amounts, based on enacted tax laws and rates applicable to the periods in which the differences are expected to affect taxable income. Valuation allowances are established, when necessary, to reduce deferred tax assets to the amount expected to be realized. ASC Topic 740 prescribes a recognition threshold and a measurement attribute for the financial statement recognition and measurement of tax positions taken or expected to be taken in a tax return. For those benefits to be recognized, a tax position must be more-likely-than-not The Company may be subject to potential examination by federal, state and city taxing authorities in the areas of income taxes. These potential examinations may include questioning the timing and amount of deductions, the nexus of income among various tax jurisdictions and compliance with federal, state and city tax laws. The Company’s management does not expect that the total amount of unrecognized tax benefits will materially change over the next twelve months. For the year ended December 31, 2019, the Company recorded income tax expense of $309,000 primarily related to interest income earned on the Trust Account. For the year ended December 31, 2018, the Company recorded income tax expense of $800 related to state income taxes.
Unrecognized Tax Benefits		Unrecognized Tax Benefits The Company recognizes tax positions in the financial statements only when it is more likely than not that the position will be sustained on examination by the relevant taxing authority based on the technical merits of the position. A position that meets this standard is measured at the largest amount of benefit that will more likely than not be realized on settlement. A liability is established for differences between positions taken in a tax return and amounts recognized in the financial statements. There were no unrecognized tax benefits as of December 31, 2019 and December 31, 2018. The Company recognizes accrued interest and penalties related to unrecognized tax benefits as income tax expense. No amounts were accrued for interest expense and penalties related to income tax matters as of December 31, 2019 and December 31, 2018. The Company is subject to income tax examinations by major taxing authorities since inception.
New Accounting Pronouncements	New Accounting Pronouncements Recent Accounting Pronouncements Adopted in 2020 Fair Value Measurement — Disclosure Framework (Topic 820) In August 2018, the FASB issued ASU No. 2018-13, Pronouncements Not Yet Adopted Leases (Topic 842) In February 2016, the FASB issued ASU No. 2016-02, Leases right-of-use (“ROU”) The Company is still assessing the impact Topic 842 will have on its future revenue and expenses. The new accounting standard is effective for the annual reporting period ended December 31, 2022 with an effective date of January 1, 2022, and the interim reporting periods beginning January 1, 2023. Early adoption is permitted. Management is currently assessing the impact the adoption of this standard will have on the Company’s consolidated financial statements as well as the available transition methods. Financial Instruments — Credit Losses (Topic 326) In June 2016, the FASB issued ASU 2016-13, Financial Instruments — Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments 2016-13”). Measurement of expected credit losses is to be based on relevant forecasts that affect collectability. The scope of financial assets within the CECL methodology is broad and includes trade receivables from certain revenue transactions and certain off-balance sheet 2019-10, 2016-13 is 2016-13 will 2016-13 does non-operating lease	Recent Accounting Pronouncements Management does not believe that any recently issued, but not yet effective, accounting pronouncements, if currently adopted, would have a material effect on the Company’s financial statements.
COVID-19 Pandemic	COVID-19 On March 11, 2020, the World Health Organization characterized the outbreak of COVID-19 COVID-19. “stay-at-home” The Company’s response to the global COVID-19 mid-March COVID-19. Despite the Company remaining operational since the second quarter of 2020, certain segments of our customer base were negatively impacted by COVID-19 pre-COVID pre-COVID in-turn, COVID-19’s COVID-19. We believe we have sufficient liquidity to fund our operations as we work through the COVID-19
Impairment of Long-lived Assets	Impairment of Long-lived Assets The Company evaluates long-lived assets, such as property and equipment and intangible assets subject to amortization, for impairment annually and whenever events or changes in circumstances indicate that the carrying value of any asset group may not be recoverable. If the estimated future cash flow (undiscounted and without interest charges) from the use of an asset are less than the carrying value, a write-down would be recorded to reduce the related asset to its estimated fair value. When reviewing long-lived assets for impairment, the Company groups long-lived assets with other assets and liabilities at the lowest level for which identifiable cash flows are largely independent of the cash flows of other assets and liabilities. After evaluating and weighing all relevant events and circumstances, the Company concluded that it was not necessary to perform an interim impairment test for the long-lived assets as of and for the period ended September 30, 2020.
Goodwill	Goodwill Pursuant to the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification Topic 350, Intangibles-Goodwill and Other non-controlling interest The Company evaluates goodwill for impairment at least annually, or more frequently if triggering events occur or other impairment indicators arise which might impair recoverability. Impairment of goodwill is evaluated at the reporting unit level. A reporting unit is defined as an operating segment (i.e. before aggregation or combination), or one level below an operating segment (i.e. a component). A component of an operating segment is a reporting unit if the component constitutes a business for which discrete financial information is available and segment management regularly reviews the operating results of that component. After evaluating and weighing all relevant events and circumstances, the Company concluded there was no triggering event that constitutes the need to perform a goodwill impairment test for the period ended September 30, 2020. It should be noted that at March 31, 2020, the Company’s share price reduction as a result of the ongoing COVID-19
Offering Costs and Transaction Expenses	Offering Costs and Transaction Expenses The Company incurred costs directly attributable to its initial public offering, such as underwriter, registration and filing fees along with direct incremental legal, accounting, and professional fees relating to the Business Combination. The Company evaluated all the fees and approximately $2.6 million of expenses were recorded as an offset against proceeds of the reverse recapitalization. As of December 31, 2019, there were $0.7 million deferred as prepaid expenses and other current assets in our accompanying Consolidated Balance Sheets. These were deferred until completion of the reverse recapitalization, at which time $0.4 million were reclassified to additional paid-in
Equity and Warrants	Equity and Warrants In conjunction with the reverse recapitalization, the Company made changes to its capital stock. The Company’s Amended and Restated Certificate of Incorporation authorizes the issuance of 201,000,000 shares of capital stock, consisting of (i) 200,000,000 shares of common stock, (the “Common Stock”) and (ii) 1,000,000 shares of preferred stock, par value $0.0001 per share. As of September 30, 2020, no shares of preferred stock authorized have been issued. As a result of the reverse recapitalization, the shares issued to Alta Equipment Holdings, Inc. shareholders in connection with the transaction are reflected as if they were issued and outstanding beginning on January 1, 2019. As of September 30, 2020, there were warrants outstanding to acquire 8,668,750 shares of the Company’s Common Stock. These warrants were issued in connection with the equity infusion related to reverse recapitalization. The Warrants entitle the registered holder to purchase one share of our Class A Common Stock at a price of $11.50 per share, subject to certain adjustments. The warrants will expire five years after the completion of our initial reverse recapitalization or earlier upon redemption or liquidation.
Share Based Compensation	Share Based Compensation The Board of Directors approved the Company’s 2020 Omnibus Incentive Plan, which enables the Company to grant stock options, stock appreciation rights, restricted stock, restricted stock units, unrestricted stock, other share based awards and cash awards to directors, employees and consultants to improve the ability of the Company to attract, retain, and motivate individuals upon whom the Company’s sustained growth and financial success depend, by providing such persons with an opportunity to acquire or increase their proprietary interest in the Company. We measure the employee stock-based awards at grant-date fair value using provisions of ASC 718 — Stock Compensation and record compensation expense over the vesting period of the award. The Company made an accounting election upon adoption of Accounting Standard Update (“ASU”) 2016-09 non-employee 2018-07.

SUMMARY OF SIGNIFICANT ACCOUN_3

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Schedule of basic and diluted income (loss) per share	Accordingly, basic and diluted income (loss) per share is calculated as follows: Year Ended December 31, 2019 2018 Net income (loss) $ 8,853 $ — Less: Income attributable to common stock subject to possible redemption (1,676,357 ) — Adjusted net loss $ (1,667,504 ) $ — Weighted average shares outstanding, basic and diluted 2,961,370 3,125,000 Basic and diluted loss per common share $ (0.56 ) $ (0.00 )

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Schedule of Income Tax Benefit	The income tax benefit for the three and nine months ended September 30, 2020 and 2019 consisted of the following: Three Months Ended September 30, Nine Months Ended September 30, 2020 2019 2020 2019 Federal taxes-current $ — $ — $ — $ — Federal taxes-deferred 1.4 — 2.6 — State taxes-current — — — — State taxes-deferred 0.5 — 0.8 — $ 1.9 $ — $ 3.4 $ —	The income tax provision consists of the following: December 31, December 31, Federal Current $ 309,000 $ — Deferred — — State Current — 800 Deferred — — Change in valuation allowance — — Income tax provision expense $ 309,000 $ 800
Schedule of Federal Income Tax Rate		A reconciliation of the federal income tax rate to the Company’s effective tax rate at December 31, 2019 and 2018 is as follows: 2019 2018 Statutory federal income tax rate 21.0 % 21.0 % State taxes, net of federal tax benefit 0.0 % (254.9 )% Non-deductible 76.2 % 0 % Income tax provision expense 97.2 % (233.9 )%

REVENUE RECOGNITION (Tables)

REVENUE RECOGNITION (Tables)	9 Months Ended
	Sep. 30, 2020
Revenue from Contract with Customer [Abstract]
Summary of Disaggregated Revenues	The following table summarizes the Company’s disaggregated revenues as presented in the Consolidated Statement of Operations for the three months and nine months ended September 30, 2020 and 2019 by revenue type, and by the applicable accounting standard. Three months ended September 30, 2020 Three months ended September 30, 2019 Topic 840 Topic 606 Total Topic 840 Topic 606 Total Revenues: New and used equipment sales $ — $ 97.9 $ 97.9 $ — $ 61.1 $ 61.1 Parts sales — 35.5 35.5 — 22.9 22.9 Service revenue — 35.5 35.5 — 27.3 27.3 Rental revenue 32.2 — 32.2 27.8 — 27.8 Rental equipment sales — 19.5 19.5 — 10.7 10.7 Net revenue $ 32.2 $ 188.4 $ 220.6 $ 27.8 $ 122.0 $ 149.8 Nine months ended September 30, 2020 Nine months ended September 30, 2019 Topic 840 Topic 606 Total Topic 840 Topic 606 Total Revenues: New and used equipment sales $ — $ 275.2 $ 275.2 $ — $ 167.1 $ 167.1 Parts sales — 92.3 92.3 — 60.0 60.0 Service revenue — 94.1 94.1 — 67.2 67.2 Rental revenue 83.4 — 83.4 66.9 — 66.9 Rental equipment sales — 48.2 48.2 — 26.8 26.8 Net revenue $ 83.4 $ 509.8 $ 593.2 $ 66.9 $ 321.1 $ 388.0

INVENTORIES (Tables)

INVENTORIES (Tables)	9 Months Ended
	Sep. 30, 2020
Inventory Disclosure [Abstract]
Summary of Components of Inventories, Net	The components of inventories, net, consisted of the following (amounts in millions): September 30, December 31, 2020 2019 New equipment $ 153.3 $ 92.8 Used equipment 29.6 18.2 Work in process 4.2 3.3 Parts 37.1 24.8 Gross Inventory $ 224.2 $ 139.1 Inventory reserve (3.1 ) (1.9 ) $ 221.1 $ 137.2

PROPERTY AND EQUIPMENT (Tables)

PROPERTY AND EQUIPMENT (Tables)	9 Months Ended
	Sep. 30, 2020
Property, Plant and Equipment [Abstract]
Schedule of Property and Equipment, Net	Property and equipment, net, consisted of the following (amounts in millions): September 30, December 31, 2020 2019 Rental fleet $ 396.8 $ 285.1 Equipment and leasehold improvements: Machinery and equipment 5.1 3.4 Autos and trucks 6.1 4.6 Leasehold improvements 8.6 7.0 Office equipment 3.0 2.3 Computer equipment 9.2 6.2 Total Cost $ 428.8 $ 308.6 Less: accumulated depreciation and amortization Rental fleet (120.3 ) (100.0 ) Equipment and leasehold improvements and computer equipment (14.8 ) (12.1 ) Total accumulated depreciation and amortization (135.1 ) (112.1 ) $ 293.7 $ 196.5

GOODWILL (Tables)

GOODWILL (Tables)	9 Months Ended
	Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Carrying Amount of Goodwill in Total and by Reportable Segment	The following table summarizes the changes in the carrying amount of goodwill in total and by reportable segment as of September 30, 2020 and December 31, 2019 (amounts in millions): Industrial Equipment Construction Equipment Total Balance, December 31, 2019 $ 4.8 $ 3.8 $ 8.6 Additions 6.0 8.2 14.2 Balance, September 30, 2020 $ 10.8 $ 12.0 $ 22.8

INTANGIBLE ASSETS (Tables)

INTANGIBLE ASSETS (Tables)	9 Months Ended
	Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Gross Carrying Amount of Intangible Assets and Accumulated Amortization	The gross carrying amount of intangible assets and accumulated amortization as of September 30, 2020 and December 31, 2019 were as follows (amounts in millions): September 30, 2020 December 31, 2019 Gross carrying amount Accumulated amortization Net carrying amount Gross carrying amount Accumulated amortization Net carrying amount Customer relationships $ 24.5 $ (2.4 ) $ 22.1 $ 5.4 $ (2.8 ) $ 2.6 Non-compete 0.7 (0.1 ) 0.6 0.4 (0.3 ) 0.1 Tradenames 1.7 (0.2 ) 1.5 0.7 (0.4 ) 0.3 Total $ 26.9 $ (2.7 ) $ 24.2 $ 6.5 $ (3.5 ) $ 3.0

LONG-TERM DEBT (Tables)

LONG-TERM DEBT (Tables)	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Schedule of Long-term Debt	The Company’s long-term debt consists of the following (amounts in millions): September 30, December 31, 2020 2019 Term Loan $ 151.1 $ — Senior lien holder — 71.2 OEM captive lender — 14.8 Subordinated debt — 6.7 First lien lender — term loan — 4.3 Subtotal $ 151.1 $ 97.0 Unamortized debt issuance costs (2.0 ) (2.5 ) Debt discount (4.9 ) (0.9 ) Total debt $ 144.2 $ 93.6 Less: Current maturities of long-term debt, net (7.8 ) (7.1 ) Long-term debt, net $ 136.4 $ 86.5

SHARE BASED COMPENSATION (Table

SHARE BASED COMPENSATION (Tables)	9 Months Ended
	Sep. 30, 2020
Share-based Payment Arrangement [Abstract]
Summary of Share Based Compensation Restricted Stock Awards	The following table shows the number of restricted stock awards that were granted and vested during 2020: Restricted Stock Awards Number of units Weighted average Granted 690,000 $ 7.60 Vested (390,000 ) $ 7.60 Forfeited — $ — As of September 30, 2020 300,000 $ 7.60

FAIR VALUE INSTRUMENTS (Tables)

FAIR VALUE INSTRUMENTS (Tables)	9 Months Ended
	Sep. 30, 2020
Fair Value Disclosures [Abstract]
Summary of Provisional Fair Value of Contingent Liability for Earn-out Consideration at Net Present Value by Level of Hierarchy	The following table sets forth, by level of hierarchy, the provisional fair value of contingent liability for the earn-out September 30, 2020 Level 1 Level 2 Level 3 Liabilities: Contingent consideration $ — $ — $ 1.8

BUSINESS COMBINATIONS (Tables)

BUSINESS COMBINATIONS (Tables)	9 Months Ended
	Sep. 30, 2020
Summary of Net Assets Acquired from Acquisition	The following table summarizes the net assets acquired from the acquisitions in 2020 (amounts in millions): Flagler Liftech Peak Hilo Martin Total Cash $ 0.4 $ — $ 3.0 $ 2.1 $ — $ 5.5 Accounts receivable 15.1 4.4 4.6 5.5 1.0 30.6 Inventory 37.5 9.6 0.4 4.7 13.2 65.4 Prepaid and other assets 0.5 1.0 0.2 0.2 — 1.9 Property, plant, and equipment 50.7 5.9 0.2 9.2 0.1 66.1 Intangible assets 14.0 0.7 4.6 3.1 — 22.4 Goodwill 6.0 2.0 1.9 2.1 2.2 14.2 Total Assets $ 124.2 $ 23.6 $ 14.9 $ 26.9 $ 16.5 $ 206.1 Floor plan payable (29.0 ) (3.5 ) — (4.4 ) — (36.9 ) Accounts payable (14.0 ) (1.6 ) (1.5 ) (2.8 ) (0.2 ) (20.1 ) Accrued expenses (4.1 ) — (0.1 ) (0.3 ) (0.1 ) (4.6 ) Other current liabilities — (0.1 ) (3.9 ) (0.4 ) — (4.4 ) Other liabilities (1.3 ) — — — — (1.3 ) Total Liabilities $ (48.4 ) $ (5.2 ) $ (5.5 ) $ (7.9 ) $ (0.3 ) $ (67.3 ) Net Assets Acquired $ 75.8 $ 18.4 $ 9.4 $ 19.0 $ 16.2 $ 138.8 Assets acquired net of cash $ 75.4 $ 18.4 $ 6.4 $ 16.9 $ 16.2 $ 133.3
Peak Logix LLC
Summary of Purchase Price Allocation	The following table summarizes the components of the purchase price at June 12, 2020: Cash consideration paid* $ 5.7 Promissory Note 1.0 Present value of non-contingent earn-out 1.7 Earn-out 1.0 Total purchase price $ 9.4
Hilo Equipment & Services
Summary of Purchase Price Allocation	The following table summarizes the component of the purchase price at July 1, 2020: Cash consideration paid* $ 18.2 Earn-out 0.8 Total purchase price $ 19.0
Northland Industrial Truck Co., Inc
Summary of Net Assets Acquired from Acquisition	The following table summarizes the net assets acquired from the acquisition in 2019 (amounts in millions): NITCO Accounts receivable $ 13.9 Other current & non-current 0.5 Inventory 35.7 Guaranteed purchase obligation asset 9.7 Property, plant, and equipment 18.8 Identifiable intangible assets 3.3 Goodwill 1.0 Total Assets $ 82.9 Accounts payable (5.2 ) Guaranteed purchase obligation liability (9.7 ) Capital lease obligations (1.3 ) Other liabilities (1.1 ) Total Liabilities $ (17.3 ) Net Assets Acquired $ 65.6
Summary of Pro Forma Information	The Company, for this presentation, prorated NITCO pro forma financial information presented in our Registration Statement on Form S-1, 9 Months ended September 30, 2019 3 Months ended September 30, 2019 1/1-9/30 1/1-4/30 1/1-9/30 6/30-9/30 6/30-9/30 The NITCO Flagler Total The Flagler Total Total revenues $ 388.0 $ 45.2 $ 139.8 $ 573.0 $ 149.8 $ 48.4 $ 198.2 Net (loss) income $ (29.6 ) $ 1.0 $ 0.8 $ (27.8 ) $ (27.4 ) $ 2.2 $ (25.2 )
FlaglerCE Holdings LLC
Summary of Pro Forma Information	9 Months ended September 30, 2020 1/1-9/30 1/1-2/14 The Company Flagler Total Total revenues $ 593.2 $ 25.8 $ 619.0 Net loss $ (20.8 ) $ (0.1 ) $ (20.9 )

SEGMENTS (Tables)

SEGMENTS (Tables)	9 Months Ended
	Sep. 30, 2020
Segment Reporting [Abstract]
Schedule of Results of Operations by Reportable Segment	The following table presents the Company’s results of operations by reportable segment for the nine months ended September 30, 2020 (amounts in millions): Industrial Equipment Construction Equipment Corporate Total New and used equipment sales $ 152.7 $ 122.5 $ — $ 275.2 Parts sales 43.7 48.6 — 92.3 Service revenue 61.8 32.3 — 94.1 Rental revenue 34.2 49.2 — 83.4 Rental equipment sales 12.3 35.9 — 48.2 Total revenue $ 304.7 $ 288.5 $ — $ 593.2 Interest expense 4.3 7.8 5.6 17.7 Depreciation and amortization 17.0 34.6 — 51.6 Net income (loss) $ 7.9 $ (14.8 ) $ (13.9 ) $ (20.8 ) The following table presents the Company’s results of operations by reportable segment for the three months ended September 30, 2020 (amounts in millions): Industrial Equipment Construction Equipment Corporate Total New and used equipment sales $ 58.7 $ 39.2 $ — $ 97.9 Parts sales 16.7 18.8 — 35.5 Service revenue 23.4 12.1 — 35.5 Rental revenue 12.2 20.0 — 32.2 Rental equipment sales 4.0 15.5 — 19.5 Total revenue $ 115.0 $ 105.6 $ — $ 220.6 Interest expense 1.4 2.7 2.0 6.1 Depreciation and amortization 6.4 14.6 — 21.0 Net income (loss) $ 2.8 $ (8.6 ) 6.1 $ 0.3 The following table presents the Company’s results of operations by reportable segment for the nine months ended September 30, 2019 (amounts in millions): Industrial Equipment Construction Equipment Corporate Total New and used equipment sales $ 98.3 $ 68.8 $ — $ 167.1 Parts sales 35.7 24.3 — 60.0 Service revenue 48.4 18.8 — 67.2 Rental revenue 26.9 40.0 — 66.9 Rental equipment sales 2.5 24.3 — 26.8 Total revenue $ 211.8 $ 176.2 $ — $ 388.0 Interest expense 3.3 6.0 5.8 15.1 Depreciation and amortization 11.6 23.1 — 34.7 Net income (loss) $ 8.0 $ (2.3 ) $ (35.3 ) $ (29.6 ) The following table presents the Company’s results of operations by reportable segment for the three months ended September 30, 2019 (amounts in millions): Industrial Equipment Construction Equipment Corporate Total New and used equipment sales $ 41.5 $ 19.6 $ — $ 61.1 Parts sales 14.3 8.6 — 22.9 Service revenue 20.2 7.1 — 27.3 Rental revenue 12.0 15.8 — 27.8 Rental equipment sales 0.7 10.0 — 10.7 Total revenue $ 88.7 $ 61.1 $ — $ 149.8 Interest expense 1.3 2.1 2.2 5.6 Depreciation and amortization 4.9 9.3 — 14.2 Net income (loss) $ 4.9 $ (1.4 ) (30.9 ) $ (27.4 )
Summary of Identified Assets by Reportable Segment	The following table presents the Company’s identified assets by reportable segment for the period ending September 30, 2020 and December 31, 2019 (amounts in millions): September 30, 2020 December 31, 2019 Segment assets: Industrial equipment $ 257.9 $ 207.5 Construction equipment 441.1 246.0 Corporate 0.8 0.7 Total assets $ 699.8 $ 454.2

Organization and Nature of Bu_2

Organization and Nature of Business Operations - Additional Information (Detail) - USD ($)	Apr. 12, 2019	Apr. 11, 2019	Dec. 31, 2019	Sep. 30, 2020	Dec. 31, 2018	Nov. 16, 2018	Dec. 27, 2017
Organization and Nature of Business Operations (Textual)
Sale of units			12,500,000
Proceeds form sale of units issued			$ 12,500,000
Gross proceeds from private placement			4,625,000
Underwriting commissions			2,500,000
Payment of offering costs			$ 639,723
Percentage of gross proceeds			2.00%
Common stock at par value			$ 0.0001	$ 0.0001
Common stock price			$ 0.01				$ 0.01
Note payable - related party					$ 50,000
Gross proceeds from public offering			$ 143,750,000
Net asset value per share			$ 1
Trust account balance			$ 145,998,591
Assets held in Trust Account, percentage			80.00%
Class A Common Stock
Organization and Nature of Business Operations (Textual)
Common stock at par value			$ 0.0001		$ 0.0001
Forward Purchase Agreement [Member]
Organization and Nature of Business Operations (Textual)
Number of unit sold			2,500,000
Sponsor
Organization and Nature of Business Operations (Textual)
Note payable - related party					$ 50,000	$ 300,000
IPO
Organization and Nature of Business Operations (Textual)
Public placements shares			12,500,000
Offering price (per unit)			$ 10
Number of unit sold			1,875,000
Description of initial business combination			Initial Business Combination, provided its public stockholders with the opportunity to redeem all or a portion of their shares upon the completion of the Initial Business Combination, either (i) in connection with a stockholder meeting called to approve the business combination or (ii) by means of a tender offer. However, in no event would the Company have redeemed its public shares in an amount that would have caused its net tangible assets to be less than $5,000,001.
Description of letter agreement founder shares			(a) to waive their redemption rights with respect to any Founder Shares, Private Placement Shares and any Public Shares held by them in connection with the completion of the Initial Business Combination, (b) to waive their redemption rights with respect to their Founder Shares, Private Placement Shares and public shares in connection with a stockholder vote to approve an amendment to the Company's amended and restated certificate of incorporation to modify the substance or timing of its obligation to redeem 100% of its public shares if it does not complete an Initial Business Combination within 18 months from the closing of the Public Offering and (c) to vote their Founder Shares and any public shares purchased during or after the Public Offering (including in open market and privately negotiated transactions) in favor of the Initial Business Combination.
Private Placement
Organization and Nature of Business Operations (Textual)
Offering price (per unit)			$ 10
Gross proceeds from private placement			$ 4,250,000
Number of unit sold	37,500		2,500,000
Common stock price			$ 11.50
Gross proceeds from sale of units	$ 375,000
Aggregate price			$ 25,000,000
Over-Allotment Option [Member]
Organization and Nature of Business Operations (Textual)
Payment of offering costs	$ 375,000
Number of unit sold	1,875,000
Percentage of gross proceeds	2.00%
Gross proceeds from sale of units	$ 18,750,000
B. Riley Principal Sponsor Co LLC [Member] | Private Placement
Organization and Nature of Business Operations (Textual)
Offering price (per unit)		$ 10
Number of unit sold		425,000

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	Nov. 14, 2018	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Feb. 14, 2020	Nov. 30, 2018	Dec. 27, 2017
Summary Of Significant Accounting Policies [Line Items]
Sponsor Loan, and accumulated earnings							$ 2,252,652
Trust account invested							145,998,591
Held in cash							654,488
Net tangible assets		$ 24,200,000			$ 24,200,000		3,000,000
Amount of federal depository insurance coverage							250,000
Deferred offering costs								$ 162,500
Payment of cost and underwriting discounts							2,875,000
Payment of offering costs							639,723
Income tax expense		(1,900,000)		$ 0	(3,400,000)	$ 0	309,000	$ 800
Goodwill impairment			$ 0		0
Offering costs offset from proceeds of reverse capitalization					2,600,000
Deferred as prepaid expenses and other current assets		$ 7,600,000			7,600,000		$ 700,000
Offering costs reclassified as additional paid-in-capital					$ 400,000
Partnership owned percentage in operating entity		100.00%			100.00%
Preferred stock, shares authorized		1,000,000			1,000,000		1,000,000	1,000,000
Preferred stock, par value		$ 0.0001			$ 0.0001		$ 0.0001	$ 0.0001
Preferred stock, shares issued		0			0
Class of Warrant or Right, Outstanding		8,668,750			8,668,750						33,333.33
Warrants expire term		5 years			5 years		5 years
Warrant
Summary Of Significant Accounting Policies [Line Items]
Share Price		$ 11.50			$ 11.50
Accounting Standards Update Topic840
Summary Of Significant Accounting Policies [Line Items]
Each warrant exercisable for common stock		1			1
Class B Common Stock
Summary Of Significant Accounting Policies [Line Items]
Class A common stock shares sold										3,593,750
Common stock, shares authorized							25,000,000	25,000,000
Class A Common Stock
Summary Of Significant Accounting Policies [Line Items]
Common stock, shares authorized							100,000,000	100,000,000
Class A Common Stock | Warrant
Summary Of Significant Accounting Policies [Line Items]
Share Price							$ 9.20
GA International Services Corp | Class B Common Stock
Summary Of Significant Accounting Policies [Line Items]
Stock split	1 to 3,593,750
Class A common stock shares sold										3,593,750
Private Placement | Class B Common Stock
Summary Of Significant Accounting Policies [Line Items]
Warrants to purchase shares of common stock							7,418,750
IPO
Summary Of Significant Accounting Policies [Line Items]
Deferred offering costs							$ 162,500
IPO | Class A Common Stock
Summary Of Significant Accounting Policies [Line Items]
Class A common stock shares sold							14,375,000
Net tangible assets							$ 5,000,001
Reverse Recapitalization | Alta Equipment Holdings, Inc.
Summary Of Significant Accounting Policies [Line Items]
Capital stock, shares authorized									201,000,000
Common stock, shares authorized									200,000,000
Preferred stock, shares authorized									1,000,000
Preferred stock, par value									$ 0.0001
Preferred stock, shares issued		0			0

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Schedule of basic and diluted income (loss) per share (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		Dec. 31, 2018
Accounting Policies [Abstract]
Net income (loss)	$ 300,000	$ (27,400,000)	$ (20,800,000)	$ (29,600,000)	$ 8,853		$ (1,142)
Less: Income attributable to common stock subject to possible redemption					(1,676,357)
Adjusted net loss					$ (1,667,504)
Weighted average shares outstanding, basic and diluted	29,221,460	7,300,000	25,689,145	7,300,000	2,961,370	[1]	3,125,000	[1]
Basic and diluted loss per common share	$ 0.01	$ (3.74)	$ (0.81)	$ (4.05)	$ (0.56)	[2]	$ 0	[2]
[1]	Excludes an aggregate of 13,820,208 shares of common stock subject to possible redemption at December 31, 2019.
[2]	Loss per common share - basic and diluted excludes income attributable to common stock subject to possible redemption of $1,676,357 for the year ended December 31, 2019.

Related Party Transactions - Ad

Related Party Transactions - Additional Information (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	Mar. 16, 2020	Apr. 12, 2019	Dec. 31, 2018	Nov. 30, 2018	Nov. 16, 2018
Related Party Transaction [Line Items]
Administrative fees					$ 10,000
Note payable - related party								$ 50,000
Class B Common Stock
Related Party Transaction [Line Items]
Number of share issued									3,593,750
Related Party Lease Agreements
Related Party Transaction [Line Items]
Operating lease, Rent expense	$ 1,200,000	$ 1,200,000	$ 3,600,000	$ 3,600,000
Sponsor
Related Party Transaction [Line Items]
Administrative fees					86,333
Note payable - related party								50,000		$ 300,000
Payable to related party					91,362		$ 67,950	50,000
Sponsor | Subsequent Event
Related Party Transaction [Line Items]
Payable to related party						$ 91,362
Great American
Related Party Transaction [Line Items]
Payable to related party					$ 8,279			$ 8,279
GA International Services Corp
Related Party Transaction [Line Items]
Description of business term					The Company's initial stockholders, officers and directors have agreed, not to transfer, assign or sell any Founder Shares held by them until the earlier to occur of (i) one year after the completion of the Initial Business Combination, (ii) the last sale price of Class A common stock equals or exceeds $12.00 per share (as adjusted for stock splits
GA International Services Corp | Class B Common Stock
Related Party Transaction [Line Items]
Number of share issued									3,593,750
GA International Services Corp | Business Combination Marketing Agreement [Member]
Related Party Transaction [Line Items]
Cash fee					3.50%
Business combination marketing agreement, description					Pursuant to the terms of the business combination marketing agreement, the Company paid the cash fee of $5,031,250 and expenses of $102,413 on February 14, 2020, the closing date of the Initial Business Combination.
GA International Services Corp | Common Stock
Related Party Transaction [Line Items]
Percentage of founder shares					20.00%

Stockholders Equity - Additiona

Stockholders Equity - Additional Information (Detail)	Nov. 14, 2018	Dec. 31, 2019$ / sharesshares	Sep. 30, 2020$ / sharesshares	Dec. 31, 2018shares	Dec. 27, 2017$ / shares
Stockholders' Equity (Textual)
Common stock, issued		7,300,000	29,511,359
Common stock, outstanding		7,300,000	29,511,359
Preferred stock, authorized		1,000,000	1,000,000	1,000,000
Warrant term		5 years	5 years
Warrant price, shares | $ / shares		$ 0.01			$ 0.01
Warrant
Stockholders' Equity (Textual)
Share price, shares | $ / shares			$ 11.50
Class A Common Stock
Stockholders' Equity (Textual)
Common stock, authorized		100,000,000		100,000,000
Common stock, issued		1,017,292		1,017,292
Common stock, outstanding		1,017,292		1,017,291
Description of warrants		The last sale price of the Class A common stock equals or exceeds $18.00 per share (as adjusted for stock splits, stock dividends, reorganizations, recapitalizations and the like) for any 20 trading days within a 30-trading day period ending on the third trading day prior to the date on which the Company sends the notice of redemption to the warrant holders.
Trading period, Number		20
Class A Common Stock | Warrant
Stockholders' Equity (Textual)
Share price, shares | $ / shares		$ 9.20
Gross proceeds from stock issuances		60.00%
Class A Common Stock | Warrant | Minimum
Stockholders' Equity (Textual)
Share price, shares | $ / shares		$ 9.20
Exercise price of the warrants		115.00%
Class A Common Stock | Warrant | Maximum
Stockholders' Equity (Textual)
Share price, shares | $ / shares		$ 18
Exercise price of the warrants		180.00%
Class B Common Stock
Stockholders' Equity (Textual)
Common stock, authorized		25,000,000		25,000,000
Common stock, issued		3,593,750		3,593,750
Common stock, outstanding		3,593,750		3,593,750
Class B Common Stock | GA International Services Corp
Stockholders' Equity (Textual)
Description of stock split	1 to 3,593,750

Fair Value Instruments - Additi

Fair Value Instruments - Additional Information (Detail) - USD ($)	Jul. 01, 2020	Jun. 12, 2020	Dec. 27, 2017	Sep. 30, 2020	Dec. 31, 2019
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities					$ 145,998,591
Granted warrants to purchase common stock			33,333.33	8,668,750
Warrants exercise price			$ 0.01		$ 0.01
Purchase of outstanding warrants upon repayment of senior indebtedness percentage			75.00%
Warrants expiration date			Dec. 27, 2027
Warrant liability				$ 0	$ 29,600,000
Peak Logix LLC
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Earn-out payment		$ 1,700,000
Fair value of incremental earn-out payment		1,700,000
Present value of non-contingent earn-out liability		$ 1,700,000
Earn-out payment period		5 years
Peak Logix LLC | Non-Contingent Consideration
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Non-contingent liability		$ 2,000,000
Hilo Equipment & Services
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Additional earn-out payment	$ 1,000,000
Other Liabilities | Peak Logix LLC
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Earn-out payment		1,000,000
Minimum | Peak Logix LLC
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Earn-out payment		2,000,000
Maximum | Peak Logix LLC
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Earn-out payment		$ 3,700,000

Income Tax - Summary of Income

Income Tax - Summary of Income Tax Benefit (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	Dec. 31, 2018
Federal
Current					$ 309,000
Deferred	$ 1,400,000		$ 2,600,000
State
Current						$ 800
Deferred	500,000		800,000
Change in valuation allowance					0	0
Income tax provision expense	$ (1,900,000)	$ 0	$ (3,400,000)	$ 0	$ 309,000	$ 800

Income Tax - Schedule of Federa

Income Tax - Schedule of Federal Income Tax Rate (Detail)	8 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Statutory federal income tax rate		21.00%	21.00%
State taxes, net of federal tax benefit		(0.00%)	(254.90%)
Non-deductible Business Combination expenses		76.20%	0.00%
Income tax provision expense	24.10%	97.20%	(233.90%)

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	Oct. 30, 2020	Jul. 01, 2020	Jun. 12, 2020	Feb. 14, 2020	Feb. 11, 2020	Sep. 30, 2020	Sep. 30, 2019
Subsequent Event [Line Items]
Floorplan eligible new equipment inventories, purchased value		$ 2.1	$ 3			$ 128.8	$ 65.6
Subsequent Event
Subsequent Event [Line Items]
Subsequent events, description					Immediately after the Closing, the Company had 29,511,359 shares of common stock outstanding, 16,884,213 of which were held by non-affiliates of the Company.
Howell Tractor and Equipment, LLC
Subsequent Event [Line Items]
Name of acquired entity						Howell Tractor and Equipment, LLC
Description of acquired entity						Howell Tractor and Equipment, LLC. ("Howell"), a privately held heavy equipment dealer serving Northern Illinois and Northwest Indiana.
Howell Tractor and Equipment, LLC | Subsequent Event
Subsequent Event [Line Items]
Business acquisition, shares issued	507,143
Business acquisition, consideration paid in cash	$ 23.3
Floorplan eligible new equipment inventories, purchased value	3.4
Total enterprise value	$ 23.8
Private Placement | Subsequent Event
Subsequent Event [Line Items]
Business acquisition, shares issued				3,500,000
Class A Common Stock | Subsequent Event
Subsequent Event [Line Items]
Business acquisition, shares issued					1,049,036
Redeemed per share price					$ 10.14

Revenue Recognition - Additiona

Revenue Recognition - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Disaggregation Of Revenue [Line Items]
Lease liability	$ 4.1		$ 4.1		$ 5.5
Liability for its guarantee to repurchase the equipment at residual amount	10.6		10.6		12.5
Net revenue	220.6	$ 149.8	593.2	$ 388
Revenue recognized from guaranteed maintenance contracts			12	$ 12.1
Service Sales Agreements, Rental Agreements and Automated Equipment Installation and System Integration Services
Disaggregation Of Revenue [Line Items]
Deferred revenue	$ 9.8		9.8		$ 4.7
Automated Equipment Installation and System Integration Services
Disaggregation Of Revenue [Line Items]
Net revenue			$ 7.1

Revenue Recognition - Summary o

Revenue Recognition - Summary of Disaggregated Revenues (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues:
Net revenue	$ 220.6	$ 149.8	$ 593.2	$ 388
Accounting Standards Update Topic840
Revenues:
Net revenue	32.2	27.8	83.4	66.9
Topic 606
Revenues:
Net revenue	188.4	122	509.8	321.1
New and Used Equipment Sales
Revenues:
Net revenue	97.9	61.1	275.2	167.1
New and Used Equipment Sales | Topic 606
Revenues:
Net revenue	97.9	61.1	275.2	167.1
Parts Sales
Revenues:
Net revenue	35.5	22.9	92.3	60
Parts Sales | Topic 606
Revenues:
Net revenue	35.5	22.9	92.3	60
Service Revenue
Revenues:
Net revenue	35.5	27.3	94.1	67.2
Service Revenue | Topic 606
Revenues:
Net revenue	35.5	27.3	94.1	67.2
Rental Revenue
Revenues:
Net revenue	32.2	27.8	83.4	66.9
Rental Revenue | Accounting Standards Update Topic840
Revenues:
Net revenue	32.2	27.8	83.4	66.9
Rental Equipment Sales
Revenues:
Net revenue	19.5	10.7	48.2	26.8
Rental Equipment Sales | Topic 606
Revenues:
Net revenue	$ 19.5	$ 10.7	$ 48.2	$ 26.8

Inventories - Summary of Compon

Inventories - Summary of Components of Inventories, Net (Detail) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Inventory Disclosure [Abstract]
New equipment	$ 153.3	$ 92.8
Used equipment	29.6	18.2
Work in process	4.2	3.3
Parts	37.1	24.8
Inventory, Gross	224.2	139.1
Inventory reserve	(3.1)	(1.9)
Inventory, Net	$ 221.1	$ 137.2

Inventories - Additional Inform

Inventories - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Inventory Disclosure [Abstract]
Capitalized direct labor expense included in work in process	$ 1.4		$ 1.4		$ 1.2
Rental depreciation expense	$ 0.9	$ 0.2	$ 2.4	$ 1.5

Property and Equipment - Schedu

Property and Equipment - Schedule of Property and Equipment, Net (Detail) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Property Plant and Equipment [Line Items]
Total Cost	$ 428.8	$ 308.6
Total accumulated depreciation and amortization	(135.1)	(112.1)
Property and equipment, net	293.7	196.5
Rental Fleet
Property Plant and Equipment [Line Items]
Total Cost	396.8	285.1
Total accumulated depreciation and amortization	(120.3)	(100)
Machinery and Equipment
Property Plant and Equipment [Line Items]
Total Cost	5.1	3.4
Autos and Trucks
Property Plant and Equipment [Line Items]
Total Cost	6.1	4.6
Leasehold Improvements
Property Plant and Equipment [Line Items]
Total Cost	8.6	7
Office Equipment
Property Plant and Equipment [Line Items]
Total Cost	3	2.3
Computer Equipment
Property Plant and Equipment [Line Items]
Total Cost	9.2	6.2
Equipment and Leasehold Improvements and Computer Equipment
Property Plant and Equipment [Line Items]
Total accumulated depreciation and amortization	$ (14.8)	$ (12.1)

Property and Equipment - Additi

Property and Equipment - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Property Plant and Equipment [Line Items]
Depreciation and amortization on property and equipment	$ 21	$ 14.2	$ 51.6	$ 34.7
Capital leases assets, gross carrying values	3.9		3.9		$ 3.5
Capital leases assets, accumulated amortization balances	2.1		2.1		1.3
GPO Assets	15.4		15.4		18.4
Property and Equipment
Property Plant and Equipment [Line Items]
Depreciation and amortization on property and equipment	19.4	$ 14	47.8	$ 33.2
Rental Fleet
Property Plant and Equipment [Line Items]
Capital leases assets, accumulated amortization balances	$ 396.8		$ 396.8		$ 285.1

Goodwill - Schedule of Carrying

Goodwill - Schedule of Carrying Amount of Goodwill in Total and by Reportable Segment (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2020USD ($)
Goodwill [Line Items]
Beginning balance	$ 8.6
Additions	14.2
Ending balance	22.8
Industrial Equipment
Goodwill [Line Items]
Beginning balance	4.8
Additions	6
Ending balance	10.8
Construction Equipment
Goodwill [Line Items]
Beginning balance	3.8
Additions	8.2
Ending balance	$ 12

Intangible Assets - Schedule of

Intangible Assets - Schedule of Gross Carrying Amount of Intangible Assets and Accumulated Amortization (Detail) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	$ 26.9	$ 6.5
Accumulated amortization	(2.7)	(3.5)
Net carrying amount	24.2	3
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	24.5	5.4
Accumulated amortization	(2.4)	(2.8)
Net carrying amount	22.1	2.6
Non-compete Agreements
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	0.7	0.4
Accumulated amortization	(0.1)	(0.3)
Net carrying amount	0.6	0.1
Tradenames
Finite Lived Intangible Assets [Line Items]
Gross carrying amount	1.7	0.7
Accumulated amortization	(0.2)	(0.4)
Net carrying amount	$ 1.5	$ 0.3

Intangible Assets - Additional

Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of intangible assets	$ 0.7	$ 0.1	$ 1.4	$ 0.2

Lines of Credit and Floor Pla_2

Lines of Credit and Floor Plans - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Feb. 14, 2020
Line Of Credit Facility [Line Items]
Recognized interest expense	$ 6,100,000	$ 5,600,000	$ 17,700,000	$ 15,100,000
Amended and Restated Credit Agreement | JP Morgan Chase Bank | Floor Plans
Line Of Credit Facility [Line Items]
Floor plan financing facility	155,000,000		155,000,000		$ 85,000,000
Amended and Restated Credit Agreement | JP Morgan Chase Bank | Aggregate Indebtedness
Line Of Credit Facility [Line Items]
Floor plan financing facility					220,000,000
Maximum borrowing capacity	225,000,000		225,000,000
Recognized interest expense	500,000		1,800,000
Amended and Restated Credit Agreement | JP Morgan Chase Bank | Revolving Line of Credit
Line Of Credit Facility [Line Items]
Floor plan financing facility	300,000,000		300,000,000		110,000,000
First Lien Lender | Floor Plans
Line Of Credit Facility [Line Items]
Floor plan financing facility	40,000,000		40,000,000		$ 85,000,000
First Lien Lender | JP Morgan Chase Bank | Floor Plans
Line Of Credit Facility [Line Items]
Floor plan financing facility	30,700,000		30,700,000
Maximum borrowing capacity	$ 40,000,000		$ 40,000,000
Effective interest rate	2.90%		2.90%
First Lien Lender | JP Morgan Chase Bank | ABL Facility
Line Of Credit Facility [Line Items]
Floor plan financing facility	$ 140,500,000		$ 140,500,000
Maximum borrowing capacity	$ 300,000,000		$ 300,000,000
Effective interest rate	2.10%		2.10%
First Lien Lender | JP Morgan Chase Bank | Floor Plans and ABL Facility
Line Of Credit Facility [Line Items]
Floor plan financing facility	$ 295,500,000		$ 295,500,000
Maximum borrowing capacity	525,000,000		525,000,000
Debt issuance costs	1,600,000		$ 1,600,000
Original Equipment Manufacturer ("OEM") Captive Lenders and Suppliers | JP Morgan Chase Bank | Minimum
Line Of Credit Facility [Line Items]
Interest only or deferred payment period			5 months
Original Equipment Manufacturer ("OEM") Captive Lenders and Suppliers | JP Morgan Chase Bank | Maximum
Line Of Credit Facility [Line Items]
Interest only or deferred payment period			12 months
Original Equipment Manufacturer ("OEM") Captive Lenders and Suppliers | JP Morgan Chase Bank | Floor Plans
Line Of Credit Facility [Line Items]
Floor plan financing facility	124,300,000		$ 124,300,000
Original Equipment Manufacturer ("OEM") Captive Lenders and Suppliers | JP Morgan Chase Bank | Floor Plans | Minimum
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	$ 10,000,000		$ 10,000,000
Effective interest rate	3.00%		3.00%
Original Equipment Manufacturer ("OEM") Captive Lenders and Suppliers | JP Morgan Chase Bank | Floor Plans | Maximum
Line Of Credit Facility [Line Items]
Maximum borrowing capacity	$ 82,000,000		$ 82,000,000
Effective interest rate	4.20%		4.20%

Long-term Debt - Additional Inf

Long-term Debt - Additional Information (Detail) - USD ($)	Jun. 12, 2020	Dec. 31, 2019	May 01, 2019	Dec. 27, 2017	May 09, 2014	Jul. 31, 2018	Apr. 30, 2018	Sep. 30, 2020
Debt Instrument [Line Items]
Debt instrument, description								In connection with the reverse recapitalization, the Company entered into a new Note Purchase Agreement (the "Term Loan") dated as of February 3, 2020, for the purposes of, among other things, (i) financing the reverse recapitalization, (ii) financing the acquisitions of Flagler and Liftech; and (iii) providing for the repayment and refinance of a portion of the Company's prior existing debt.
Warrants exercise price		$ 0.01		$ 0.01
Subordinated debt								$ 0
Loss on the extinguishment of debt								$ 7,600,000
Peak Logix LLC
Debt Instrument [Line Items]
Earn-out payment period	5 years
Present value of non-contingent earn-out liability	$ 1,700,000
Commercial Paper | Peak Logix LLC
Debt Instrument [Line Items]
Debt instrument, interest rate	6.00%
Unsecured promissory note	$ 1,000,000
Subordinated Debt
Debt Instrument [Line Items]
Debt Instrument, Payment Terms								On February 14, 2020, in connection with the reverse recapitalization, and in conjunction with entering into the Amended and Restated Credit Agreement and Term Loan, the Company repaid in full the subordinated debt to the former shareholders of Alta Equipment Company and terminated all commitments and discharged all guarantees related to those agreements.
Term Loan
Debt Instrument [Line Items]
Floor plan financing facility								$ 151,100,000
Debt issuance costs								6,900,000
Senior Lien Notes and OEM Captive Lender
Debt Instrument [Line Items]
Early call premiums paid to holders								3,900,000
Notes Payable | Non-Contingent Consideration | Peak Logix LLC
Debt Instrument [Line Items]
Earn-out payment period	5 years
Notes Payable | Non-Contingent Consideration | Other Liabilities | Peak Logix LLC
Debt Instrument [Line Items]
Present value of non-contingent earn-out liability								1,700,000
Notes Payable | Minimum | Non-Contingent Consideration | Peak Logix LLC
Debt Instrument [Line Items]
Additional earn-out payment	$ 2,000,000
Senior Lien Holder | Note Purchase Agreement
Debt Instrument [Line Items]
Note payable		$ 40,000,000
Additional delayed note payable		20,000,000		$ 20,000,000
Borrowed against delayed draw commitment			$ 11,500,000			$ 5,000,000	$ 3,500,000
Percentage of payment-in-kind interest on unpaid principal amount				10.00%
Paid-in-kind interest		$ 11,200,000
Debt instrument, maturity date				Jun. 27, 2023
Warrants issued to purchase percentage of common units outstanding				25.00%
Warrants exercise price				$ 0.01
First Lien and Second Lien Lender | Subordinated Debt
Debt Instrument [Line Items]
Debt instrument, maturity date				Dec. 31, 2027
Debt instrument, interest rate				5.00%
Second Lien Lender | Term Loan
Debt Instrument [Line Items]
Debt instrument, face amount				$ 155,000,000
Debt instrument, maturity period				2025-08
Payable in monthly installments								$ 1,900,000
Effective interest rate								9.80%
Second Lien Lender | Term Loan | LIBOR
Debt Instrument [Line Items]
Debt Instrument, variable rate								8.00%
OEM Captive Lender
Debt Instrument [Line Items]
Note payable								$ 0
OEM Captive Lender | Master Note Agreement
Debt Instrument [Line Items]
Debt instrument, maturity period					2024-10
OEM Captive Lender | Master Note Agreement | Minimum
Debt Instrument [Line Items]
Debt instrument, interest rate					3.29%
OEM Captive Lender | Master Note Agreement | Maximum
Debt Instrument [Line Items]
Debt instrument, interest rate					4.99%

Long-term Debt - Schedule of Lo

Long-term Debt - Schedule of Long-term Debt (Detail) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Subtotal	$ 151.1	$ 97
Unamortized debt issuance costs	(2)	(2.5)
Debt discount	(4.9)	(0.9)
Total debt	144.2	93.6
Less: Current maturities of long-term debt, net	(7.8)	(7.1)
Long-term debt, net of current portion	136.4	86.5
Senior Lien Holder
Debt Instrument [Line Items]
Subtotal		71.2
OEM Captive Lender
Debt Instrument [Line Items]
Subtotal		14.8
Subordinated Debt
Debt Instrument [Line Items]
Subtotal		6.7
Term Loan
Debt Instrument [Line Items]
Subtotal	$ 151.1	$ 4.3

Contingencies - Additional Info

Contingencies - Additional Information (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Commitments And Contingencies [Line Items]
Estimated exposure of guarantees	$ 2,600,000	$ 3,300,000
Guarantees accrued	$ 0	$ 0
Minimum
Commitments And Contingencies [Line Items]
Term of guarantees	3 years
Maximum
Commitments And Contingencies [Line Items]
Term of guarantees	5 years

Income Tax - Additional Informa

Income Tax - Additional Information (Detail) - USD ($)	3 Months Ended		8 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income tax benefit (expense)	$ 1,900,000	$ 0		$ 3,400,000	$ 0	$ (309,000)	$ (800)
Pre-tax loss	(1,600,000)	$ (27,400,000)	$ (14,100,000)	(24,200,000)	$ (29,600,000)	$ 317,853	$ (342)
Effective income tax rate			24.10%			97.20%	(233.90%)
Net deferred tax liabilities related to property and equipment assets and other temporary items	$ 15,600,000		$ 15,600,000	$ 15,600,000

Share Based Compensation - Addi

Share Based Compensation - Additional Information (Detail) - USD ($) $ in Millions	Aug. 18, 2020	Sep. 30, 2020	Sep. 30, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Compensation expense		$ 3.2	$ 3.2
Number of shares, vested			390,000
RSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Compensation expense	$ 3
RSUs | Directors, Officers and Employees | 2020 Omnibus Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares approved for grant		690,000	690,000
RSUs | Robert T.Chiles | Construction Group | Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares, vested	390,000
Number of shares converted	390,000
Restricted Stock Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares, vested			390,000
Unrecognized compensation expense		$ 2	$ 2
Unrecognized compensation expense, weighted average recognition period			3 years

Share Based Compensation - Summ

Share Based Compensation - Summary of Share Based Compensation Restricted Stock Awards (Detail)	9 Months Ended
	Sep. 30, 2020$ / sharesshares
Number of units
Number of units, Granted | shares	690,000
Number of units, Vested | shares	(390,000)
Number of units, Ending balance | shares	300,000
Weighted average grant date fair value
Weighted average grant date fair value, Granted | $ / shares	$ 7.60
Weighted average grant date fair value, Vested | $ / shares	7.60
Weighted average grant date fair value, Ending balance | $ / shares	$ 7.60

Fair value instruments - Summar

Fair value instruments - Summary of provisional fair value of contingent liability (Detail) $ in Millions	Sep. 30, 2020USD ($)
Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liabilities: Contingent consideration	$ 1.8

Business Combinations - Summary

Business Combinations - Summary of Net Assets Acquired from Acquisition (Detail) - USD ($) $ in Millions	Sep. 01, 2020	Jul. 01, 2020	Jun. 12, 2020	Feb. 14, 2020	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	May 01, 2019
Business Acquisition [Line Items]
Goodwill					$ 22.8		$ 8.6
Assets acquired net of cash		$ 2.1	$ 3		128.8	$ 65.6
FlaglerCE Holdings LLC
Business Acquisition [Line Items]
Cash				$ 0.4
Accounts receivable				15.1
Inventory				37.5
Prepaid and other assets				0.5
Property, plant, and equipment				50.7
Intangible assets				14
Goodwill				6
Total Assets				124.2
Floor plan payable				(29)
Accounts payable				(14)
Accrued expenses				(4.1)
Other liabilities				(1.3)
Total Liabilities				(48.4)
Net Assets Acquired				75.8
Assets acquired net of cash				75.4
Liftech Equipment Companies, Inc.
Business Acquisition [Line Items]
Accounts receivable				4.4
Inventory				9.6
Prepaid and other assets				1
Property, plant, and equipment				5.9
Intangible assets				0.7
Goodwill				2
Total Assets				23.6
Floor plan payable				(3.5)
Accounts payable				(1.6)
Other current liabilities				(0.1)
Total Liabilities				(5.2)
Net Assets Acquired				18.4
Assets acquired net of cash				$ 18.4
Peak Logix LLC
Business Acquisition [Line Items]
Cash			3
Accounts receivable			4.6
Inventory			0.4
Prepaid and other assets			0.2
Property, plant, and equipment			0.2
Intangible assets			4.6
Goodwill			1.9
Total Assets			14.9
Accounts payable			(1.5)
Accrued expenses			(0.1)
Other current liabilities			(3.9)
Total Liabilities			(5.5)
Net Assets Acquired			9.4
Assets acquired net of cash			$ 6.4
Hilo Equipment & Services
Business Acquisition [Line Items]
Cash		2.1
Accounts receivable		5.5
Inventory		4.7
Prepaid and other assets		0.2
Property, plant, and equipment		9.2
Intangible assets		3.1
Goodwill		2.1
Total Assets		26.9
Floor plan payable		(4.4)
Accounts payable		(2.8)
Accrued expenses		(0.3)
Other current liabilities		(0.4)
Total Liabilities		(7.9)
Net Assets Acquired		19
Assets acquired net of cash		$ 16.9
Martin Implement Sales, Inc.
Business Acquisition [Line Items]
Accounts receivable	$ 1
Inventory	13.2
Property, plant, and equipment	0.1
Goodwill	2.2
Total Assets	16.5
Accounts payable	(0.2)
Accrued expenses	(0.1)
Total Liabilities	(0.3)
Net Assets Acquired	16.2
Assets acquired net of cash	$ 16.2
Flagler, Liftech, Peak, Hilo and Martin
Business Acquisition [Line Items]
Cash					5.5
Accounts receivable					30.6
Inventory					65.4
Prepaid and other assets					1.9
Property, plant, and equipment					66.1
Intangible assets					22.4
Goodwill					14.2
Total Assets					206.1
Floor plan payable					(36.9)
Accounts payable					(20.1)
Accrued expenses					(4.6)
Other current liabilities					(4.4)
Other liabilities					(1.3)
Total Liabilities					(67.3)
Net Assets Acquired					138.8
Assets acquired net of cash					$ 133.3
Northland Industrial Truck Co., Inc
Business Acquisition [Line Items]
Accounts receivable								$ 13.9
Other current & non-current assets								0.5
Inventory								35.7
Guaranteed purchase obligation asset								9.7
Property, plant, and equipment								18.8
Identifiable intangible assets								3.3
Goodwill								1
Total Assets								82.9
Accounts payable								(5.2)
Guaranteed purchase obligation liability								(9.7)
Capital lease obligations								(1.3)
Other liabilities								(1.1)
Total Liabilities								(17.3)
Net Assets Acquired								$ 65.6

Business Combinations - Additio

Business Combinations - Additional Information (Detail) - USD ($) $ in Millions		Sep. 01, 2020	Jul. 01, 2020	Jun. 12, 2020	Feb. 14, 2020	May 01, 2019	Sep. 30, 2020	Sep. 30, 2019
Business Acquisition [Line Items]
Enterprise value, net of cash acquired			$ 2.1	$ 3			$ 128.8	$ 65.6
FlaglerCE Holdings LLC
Business Acquisition [Line Items]
Total consideration paid					$ 75.8
Percentage of goodwill expected to be deductible for income tax purposes					100.00%
Enterprise value, net of cash acquired					$ 75.4
FlaglerCE Holdings LLC | New Equipment
Business Acquisition [Line Items]
Additional floorplan borrowings					1.2
Enterprise value, net of cash acquired					74.2
Liftech Equipment Companies, Inc.
Business Acquisition [Line Items]
Total consideration paid					$ 18.4
Percentage of goodwill expected to be deductible for income tax purposes					100.00%
Enterprise value, net of cash acquired					$ 18.4
Liftech Equipment Companies, Inc. | New Equipment
Business Acquisition [Line Items]
Total consideration paid					15.9
Additional floorplan borrowings					$ 2.5
Peak Logix LLC
Business Acquisition [Line Items]
Total consideration paid				$ 9.4
Percentage of goodwill expected to be deductible for income tax purposes				100.00%
Enterprise value, net of cash acquired				$ 6.4
Cash Consideration paid	[1]			5.7
Additional consideration				$ 1
Earn-out payment period				5 years
Earn-out payment				$ 1.7
Peak Logix LLC | Commercial Paper
Business Acquisition [Line Items]
Additional consideration				$ 1
Debt instrument, interest rate				6.00%
Peak Logix LLC | Minimum
Business Acquisition [Line Items]
Earn-out payment				$ 2
Peak Logix LLC | Maximum
Business Acquisition [Line Items]
Earn-out payment				$ 3.7
Hilo Equipment & Services
Business Acquisition [Line Items]
Total consideration paid			$ 19
Percentage of goodwill expected to be deductible for income tax purposes			100.00%
Enterprise value, net of cash acquired			$ 16.9
Cash Consideration paid	[2]		18.2
Additional earn-out payment			1
Hilo Equipment & Services | New Equipment
Business Acquisition [Line Items]
Enterprise value, net of cash acquired			$ 16.9
Martin Implement Sales, Inc.
Business Acquisition [Line Items]
Percentage of goodwill expected to be deductible for income tax purposes		100.00%
Enterprise value, net of cash acquired		$ 16.2
Martin Implement Sales, Inc. | Industrial Equipment
Business Acquisition [Line Items]
Total consideration paid		16.2
Martin Implement Sales, Inc. | New Equipment
Business Acquisition [Line Items]
Total consideration paid		14.1
Additional floorplan borrowings		$ 2.1
Northland Industrial Truck Co., Inc
Business Acquisition [Line Items]
Total consideration paid						$ 65.6
Northland Industrial Truck Co., Inc | Industrial Equipment
Business Acquisition [Line Items]
Goodwill expected to be deductible for income tax purposes						1
Northland Industrial Truck Co., Inc | New Equipment
Business Acquisition [Line Items]
Total consideration paid						42.1
Additional floorplan borrowings						$ 23.5
[1]	Includes $3.0 million cash acquired as part of the Business Combination
[2]	Includes $2.1 million cash acquired as part of the Business Combination

Business Combinations - Summa_2

Business Combinations - Summary of Components of Purchase Price (Detail) - USD ($) $ in Millions		Jul. 01, 2020	Jun. 12, 2020
Peak Logix LLC
Business Acquisition [Line Items]
Cash Consideration paid	[1]		$ 5.7
Promissory Note			1
Present value of non-contingent earn-out liability			1.7
Earn-out liability			1
Total purchase price			$ 9.4
Hilo Equipment & Services
Business Acquisition [Line Items]
Cash Consideration paid	[2]	$ 18.2
Earn-out liability		0.8
Total purchase price		$ 19
[1]	Includes $3.0 million cash acquired as part of the Business Combination
[2]	Includes $2.1 million cash acquired as part of the Business Combination

Business Combinations - Summa_3

Business Combinations - Summary of Components of Purchase Price (Parenthetical) (Detail) - USD ($) $ in Millions	Jul. 01, 2020	Jun. 12, 2020	Sep. 30, 2020	Sep. 30, 2019
Business Combination, Consideration Transferred [Abstract]
Business combination, Cash acquired	$ 2.1	$ 3	$ 128.8	$ 65.6

Business Combinations - Summa_4

Business Combinations - Summary of Pro Forma Information (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	Dec. 31, 2018
Business Acquisition Pro Forma Information Nonrecurring Adjustment [Line Items]
Total revenues	$ 220,600,000	$ 149,800,000	$ 593,200,000	$ 388,000,000
Net (loss) income	$ 300,000	(27,400,000)	(20,800,000)	(29,600,000)	$ 8,853	$ (1,142)
FlaglerCE Holdings LLC
Business Acquisition Pro Forma Information Nonrecurring Adjustment [Line Items]
Total revenues		48,400,000	25,800,000	139,800,000
Net (loss) income		2,200,000	(100,000)	800,000
Northland Industrial Truck Co., Inc
Business Acquisition Pro Forma Information Nonrecurring Adjustment [Line Items]
Total revenues				45,200,000
Net (loss) income				1,000,000
Consolidate Entities And Flagler C E Holdings L L C
Business Acquisition Pro Forma Information Nonrecurring Adjustment [Line Items]
Total revenues		198,200,000	619,000,000
Net (loss) income		$ (25,200,000)	$ (20,900,000)
Consolidated Entities, NITCO and Flagler
Business Acquisition Pro Forma Information Nonrecurring Adjustment [Line Items]
Total revenues				573,000,000
Net (loss) income				$ (27,800,000)

Segments - Additional Informati

Segments - Additional Information (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2020USD ($)Segment	Dec. 31, 2019USD ($)
Segment Reporting [Abstract]
Number of reportable segments | Segment	2
Loss on debt extinguishment	$ 7.6
Transaction costs	7.6	$ 0.7
Proceeds from life insurance policy	$ 8

Segments - Schedule of Results

Segments - Schedule of Results of Operations by Reportable Segment (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	Dec. 31, 2018
Segment Reporting Information [Line Items]
Total revenue	$ 220,600,000	$ 149,800,000	$ 593,200,000	$ 388,000,000
Interest expense	6,100,000	5,600,000	17,700,000	15,100,000
Depreciation and amortization	21,000,000	14,200,000	51,600,000	34,700,000
Net income (loss)	300,000	(27,400,000)	(20,800,000)	(29,600,000)	$ 8,853	$ (1,142)
New and Used Equipment Sales
Segment Reporting Information [Line Items]
Total revenue	97,900,000	61,100,000	275,200,000	167,100,000
Parts Sales
Segment Reporting Information [Line Items]
Total revenue	35,500,000	22,900,000	92,300,000	60,000,000
Service Revenue
Segment Reporting Information [Line Items]
Total revenue	35,500,000	27,300,000	94,100,000	67,200,000
Rental Revenue
Segment Reporting Information [Line Items]
Total revenue	32,200,000	27,800,000	83,400,000	66,900,000
Rental Equipment Sales
Segment Reporting Information [Line Items]
Total revenue	19,500,000	10,700,000	48,200,000	26,800,000
Operating Segments | Industrial Equipment
Segment Reporting Information [Line Items]
Total revenue	115,000,000	88,700,000	304,700,000	211,800,000
Interest expense	1,400,000	1,300,000	4,300,000	3,300,000
Depreciation and amortization	6,400,000	4,900,000	17,000,000	11,600,000
Net income (loss)	2,800,000	4,900,000	7,900,000	8,000,000
Operating Segments | Construction Equipment
Segment Reporting Information [Line Items]
Total revenue	105,600,000	61,100,000	288,500,000	176,200,000
Interest expense	2,700,000	2,100,000	7,800,000	6,000,000
Depreciation and amortization	14,600,000	9,300,000	34,600,000	23,100,000
Net income (loss)	(8,600,000)	(1,400,000)	(14,800,000)	(2,300,000)
Operating Segments | New and Used Equipment Sales | Industrial Equipment
Segment Reporting Information [Line Items]
Total revenue	58,700,000	41,500,000	152,700,000	98,300,000
Operating Segments | New and Used Equipment Sales | Construction Equipment
Segment Reporting Information [Line Items]
Total revenue	39,200,000	19,600,000	122,500,000	68,800,000
Operating Segments | Parts Sales | Industrial Equipment
Segment Reporting Information [Line Items]
Total revenue	16,700,000	14,300,000	43,700,000	35,700,000
Operating Segments | Parts Sales | Construction Equipment
Segment Reporting Information [Line Items]
Total revenue	18,800,000	8,600,000	48,600,000	24,300,000
Operating Segments | Service Revenue | Industrial Equipment
Segment Reporting Information [Line Items]
Total revenue	23,400,000	20,200,000	61,800,000	48,400,000
Operating Segments | Service Revenue | Construction Equipment
Segment Reporting Information [Line Items]
Total revenue	12,100,000	7,100,000	32,300,000	18,800,000
Operating Segments | Rental Revenue | Industrial Equipment
Segment Reporting Information [Line Items]
Total revenue	12,200,000	12,000,000	34,200,000	26,900,000
Operating Segments | Rental Revenue | Construction Equipment
Segment Reporting Information [Line Items]
Total revenue	20,000,000	15,800,000	49,200,000	40,000,000
Operating Segments | Rental Equipment Sales | Industrial Equipment
Segment Reporting Information [Line Items]
Total revenue	4,000,000	700,000	12,300,000	2,500,000
Operating Segments | Rental Equipment Sales | Construction Equipment
Segment Reporting Information [Line Items]
Total revenue	15,500,000	10,000,000	35,900,000	24,300,000
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Interest expense	2,000,000	2,200,000	5,600,000	5,800,000
Net income (loss)	$ 6,100,000	$ (30,900,000)	$ (13,900,000)	$ (35,300,000)

Segments - Summary of Identifie

Segments - Summary of Identified Assets by Reportable Segment (Detail) - USD ($)	Sep. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of Depreciation by Segment [Line Items]
TOTAL ASSETS	$ 699,800,000	$ 454,200,000	$ 212,158
Operating Segments | Industrial Equipment
Reconciliation of Depreciation by Segment [Line Items]
TOTAL ASSETS	257,900,000	207,500,000
Operating Segments | Construction Equipment
Reconciliation of Depreciation by Segment [Line Items]
TOTAL ASSETS	441,100,000	246,000,000
Corporate, Non-Segment
Reconciliation of Depreciation by Segment [Line Items]
TOTAL ASSETS	$ 800,000	$ 700,000