Acquisitions and Divestiture - Summary of Fair Value Allocation of Assets Acquired and Liabilities Assumed at the Acquisition Date (Details) - USD ($) $ in Thousands	Sep. 16, 2019	Jul. 19, 2019	Apr. 01, 2019	Feb. 01, 2019	Jun. 01, 2018	Dec. 31, 2019	Jan. 04, 2019	Dec. 31, 2018
Assets acquired
Goodwill						$ 23,837		$ 2,887
Sheehy [Member]
Assets acquired
Accounts receivable - trade			$ 376
Alternative fuels tax credit receivable			30
Due from related party			252
Prepaid expenses and other current assets			302
Property and equipment			3,091
Goodwill			4,051				$ 4,100
Right-of-use assets			5,878
Other long-term assets			3
Total assets acquired			15,043
Liabilities assumed
Accounts payable			(2,908)
Accrued expenses			(1,183)
Debt			(2,639)
Operating lease liabilities			(4,476)
Finance lease liabilities			(1,552)
Total liabilities assumed			(12,758)
Net assets acquired			2,285
Consideration paid
Fair value of shares of common stock			2,285
Total			2,285
Sheehy [Member] | Trade Names [Member]
Assets acquired
Finite lived intangibles			320
Sheehy [Member] | Customer Relationships [Member]
Assets acquired
Finite lived intangibles			650
Sheehy [Member] | Noncompete Agreements [Member]
Assets acquired
Finite lived intangibles			$ 90
Ursa and JB Lease [Member]
Assets acquired
Cash				$ 3,743
Accounts receivable - trade				579
Prepaid expenses and other current assets				1,646
Property and equipment				15,509
Goodwill				6,881
Right-of-use assets				2,180
Other long-term assets				32
Total assets acquired				32,150
Liabilities assumed
Accounts payable				(5,641)
Accrued expenses				(1,493)
Debt				(11,199)
Operating lease liabilities				(2,180)
Deferred tax liabilities				(1,891)
Total liabilities assumed				(22,404)
Net assets acquired				9,746
Consideration paid
Fair value of shares of common stock				816
Cash				2,500
Promissory note				6,430
Total				9,746
Ursa and JB Lease [Member] | Trade Names [Member]
Assets acquired
Finite lived intangibles				1,300
Ursa and JB Lease [Member] | Customer Relationships [Member]
Assets acquired
Finite lived intangibles				200
Ursa and JB Lease [Member] | Noncompete Agreements [Member]
Assets acquired
Finite lived intangibles				$ 80
Finkle and Courtlandt [Member]
Assets acquired
Cash		$ 2
Prepaid expenses and other current assets		113
Property and equipment		6,778
Goodwill		2,384
Right-of-use assets		2,172
Total assets acquired		12,214
Liabilities assumed
Accrued expenses		(199)
Debt		(5,049)
Operating lease liabilities		(2,105)
Finance lease liabilities		(113)
Deferred tax liabilities		(1,511)
Total liabilities assumed		(8,977)
Net assets acquired		3,237
Consideration paid
Fair value of shares of common stock		1,987
Cash		1,250
Total		3,237
Finkle and Courtlandt [Member] | Trade Names [Member]
Assets acquired
Finite lived intangibles		60
Finkle and Courtlandt [Member] | Customer Relationships [Member]
Assets acquired
Finite lived intangibles		700
Finkle and Courtlandt [Member] | Noncompete Agreements [Member]
Assets acquired
Finite lived intangibles		$ 5
Ritter Companies [Member]
Assets acquired
Cash	$ 1,134
Accounts receivable - trade	3,774
Prepaid expenses and other current assets	830
Property and equipment	13,650
Goodwill	8,704
Right-of-use assets	1,515
Other long-term assets	426
Total assets acquired	30,643
Liabilities assumed
Accounts payable and accrued expenses	(2,105)
Debt	(499)
Operating lease liabilities	(1,515)
Deferred tax liabilities	(2,447)
Total liabilities assumed	(6,566)
Net assets acquired	24,077
Consideration paid
Fair value of shares of common stock	3,466
Cash	20,611
Total	24,077
Ritter Companies [Member] | Trade Names [Member]
Assets acquired
Finite lived intangibles	190
Ritter Companies [Member] | Customer Relationships [Member]
Assets acquired
Finite lived intangibles	310
Ritter Companies [Member] | Noncompete Agreements [Member]
Assets acquired
Finite lived intangibles	$ 110
Thunder Ridge
Assets acquired
Accounts receivable - trade					$ 2,062
Prepaid expenses and other current assets					160
Property and equipment					208
Goodwill					2,887
Deposits and other long-term assets					205
Total assets acquired					8,352
Trade names					460
Non-competition agreement					40
Customer relationships					2,330
Liabilities assumed
Accounts payable					(1,027)
Accrued expenses					(1,573)
Factored receivable advance					(1,231)
Lines-of-credit					(422)
Debt					(187)
Fuel discount advance					(997)
Total liabilities assumed					(5,437)
Net assets acquired					2,915
Consideration paid
Fair value of shares of common stock					415
Promissory note					2,500
Total					$ 2,915