Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities
Net loss	$ (24,210)	$ (14,445)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation and amortization	7,115	2,758
Non-cash lease expense	2,066	1,300
Gain on sale of assets	(8)	(6)
Amortization of debt discount and debt issuance costs	1,425	516
Deferred income taxes	(189)
Stock option and warrant-based compensation	399	200
Non-cash interest expense	1,347	51
Change in fair value of embedded derivative liability	(154)
Bad debt expense		27
Change in fair value of warrant liabilities	(7,260)
Change in fair value of contingent consideration	296
Loss on extinguishment of debt	10,056
Realized gain on derivative liability		(11)
Gain on conversion of accounts payable to common stock		(12)
Common stock issued for services - related party		25
Common stock issued for interest		14
Changes in assets and liabilities
Accounts receivable - trade	370	(150)
Accounts receivable - related party		41
Alternative fuels tax credit receivable	976	298
Due from related party	(1)
Other assets	(1,640)	462
Accounts payable	(5,471)	(4,164)
Accounts payable - related party		(45)
Accrued expenses and other current liabilities	(2,122)	(521)
Accrued interest - related party	476	308
Operating lease liabilities	(2,160)	(1,250)
Net cash used in operating activities	(18,381)	(14,604)
Cash flows from investing activities
Cash paid for acquisition of JB Lease		(2,500)
Cash acquired from acquisition of Ursa and JB Lease		3,743
Right-of-use asset deposit		(400)
Purchases of equipment	(61)	(26)
Proceeds from sale of assets	8	186
Net cash provided by (used in) investing activities	(53)	1,003
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	4,902
Payments of principal on debt	(3,230)	(5,692)
Line of credit, net		(317)
Proceeds from issuance of debt - related party	6,150	400
Payments of principal on debt - related party	(171)	(365)
Payments on fuel advance		(2)
Advances from factoring arrangements, net	3,424	9,428
Debt issuance costs	(296)
Payments on finance lease liability	(1,388)	(219)
Net cash provided by financing activities	20,639	19,535
Net increase in cash	2,205	5,934
Cash - beginning of period	3,274	1,630
Cash - end of period	5,479	7,564
Supplemental disclosure of cash flow information:
Interest paid	2,670	1,472
Supplemental schedule of non-cash investing and financing activities:
Right-of-use assets obtained in exchange for finance lease liabilities	16,991
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		3,101
Debt issued to sellers for acquisitions		6,430
Fixed assets acquired from the issuance of debt		234
Common stock for settlement of accounts payable - related party		293
Common stock for settlement of accounts payable		$ 10