Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Operating activities:
Net income (loss)	$ 43,914	$ (22,230)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Stock-based compensation	2,390	663
Bad debt expense	204
Depreciation and amortization expense	1,074	474
Contingent consideration	(23)	679
Change in fair value of obligation to issue shares of common stock to sellers of World Energy	(18)
Fair value change of derivative liability	(81,960)	3,565
Loss on extinguishment of debt		1,038
Loss on disposal of assets	45
Change in operating right-of-use assets	7
Interest on finance leases	25
Debt discount	(40)	3,143
Changes in operating assets and liabilities:
Accounts receivable, net	10,883	(5,240)
Inventory, net	(13,248)	(2,313)
Prepaid expenses and other current assets	286	1
Other assets	(23)	(152)
Accounts payable	(2,269)	3,416
Accrued expenses and other current liabilities	4,420	3,869
Deferred revenue	118
Net cash used in operating activities	(34,215)	(13,087)
Investing activities:
Payments to acquire net assets of World Energy, net of cash acquired	(8,188)
Purchase of convertible note	(3,000)
Purchases of property and equipment	(2,917)	(162)
Net cash used in investing activities	(14,105)	(162)
Financing activities:
Proceeds from the issuance of subordinated convertible promissory notes		8,100
Proceeds from paycheck protection program		1,100
Repayments of revolving line of credit		(646)
Repayments of debt	(85)	(513)
Repayments under financing leases	(150)
Proceeds from revolving line of credit		2,500
Proceeds from the exercise of warrants		884
Proceeds from recapitalization of PIC shares	75
Proceeds from exercise of stock options	32	21
Proceeds from exercise of Public Warrants	85,555
Net cash provided by financing activities	85,427	11,446
Net increase in cash and cash equivalents and restricted cash:	37,107	(1,803)
Cash, cash equivalents, and restricted cash at beginning of period	329,791	3,536
Cash, cash equivalents, and restricted cash at end of period	366,898	1,733
Supplemental disclosure of cash flow information:
Cash paid for interest	35	156
Supplemental disclosures of noncash investing and financing information:
Settlement of warrant liability upon exercise of Public Warrants	47,162
Settlement of warrant liability upon call of warrants	591
Reduce derivative liability for extinguishment of convertible notes payable		(1,349)
Increase derivative liability for issuance of convertible notes payable		5,638
Equipment financing	$ 271