Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities
Net loss	$ (32,645)	$ (18,661)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation and amortization	10,931	4,794
Non-cash lease expense	3,042	2,145
Loss on sale of assets	206	191
Amortization of debt discount and debt issuance costs	1,819	847
Deferred income taxes	(255)	(5,610)
Stock option and warrant-based compensation	428	1,129
Non-cash interest expense	2,758	2,219
Change in fair value of embedded derivative liability	(661)
Bad debt expense	57
Change in fair value of warrant liabilities	(5,534)
Change in fair value of contingent consideration	296
Loss on extinguishment of debt	10,010
Realized gain on derivative liability		(11)
Gain on conversion of accounts payable to common stock		(186)
Common stock issued for services - related party		25
Common stock issued for interest		14
Changes in assets and liabilities
Accounts receivable - trade	(4,705)	702
Accounts receivable - related party		41
Alternative fuels tax credit receivable	1,460	(1,178)
Due from related party		(145)
Other assets	(2,303)	(3,258)
Accounts payable	(7,048)	(1,008)
Accounts payable - related party		(45)
Accrued expenses and other current liabilities	3,534	(240)
Accrued interest - related party	844	482
Operating lease liabilities	(3,253)	(2,399)
Net cash used in operating activities	(21,019)	(20,152)
Cash flows from investing activities
Acquisitions, net of cash acquired		(19,482)
Purchases of equipment	(61)	(1,736)
Proceeds from sale of assets	430	192
Net cash provided by (used in) investing activities	369	(21,026)
Cash flows from financing activities
Proceeds from sale of common stock, preferred stock and warrants	6,150	11,400
Proceeds from issuance of debt	10,000	26,768
Payments of principal on debt	(4,430)	(8,336)
Proceeds from sale-leaseback		1,889
Proceeds from issuance of debt - related party	6,150	400
Payments of principal on debt - related party	(266)	(362)
Payments on fuel advance		(38)
Advances from factoring arrangements	132,294	114,101
Payments on factoring arrangements	(122,461)	(102,641)
Debt issuance costs	(296)	(678)
Payments on finance lease liability	(2,487)	(664)
Payments on related party advances		(324)
Net cash provided by financing activities	24,654	41,515
Net increase in cash	4,004	337
Cash - beginning of period	3,274	1,630
Cash - end of period	7,278	1,967
Supplemental disclosure of cash flow information:
Income tax paid	1	7
Interest paid	3,046	3,271
Supplemental schedule of non-cash investing and financing activities:
Right-of-use assets obtained in exchange for finance lease liabilities	18,490
Right-of-use assets obtained in exchange for operating lease liabilities	3,379
Held-for-sale assets sold for noncash consideration	$ 450
Fair value of common stock and redeemable common stock issued for acquisitions		8,553
Debt issued to sellers for acquisitions		6,430
Common stock for settlement of accounts payable - related party		120
Common stock for settlement of accounts payable		10
Fair value of warrants and common stock issued in connection with financing arrangements		$ 7,775