Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (90,133)	$ (48,457)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization expense	4,120	2,302
Gain (loss) on disposal of property and equipment	28	(5)
Stock-based compensation expense	3,821	755
Non-cash interest expense		422
Change in fair value of warrant liabilities	(956)	200
Amortization of deferred finance costs	423
Changes in operating assets and liabilities:
Accounts receivable	(10,000)
Prepaid expenses and other assets	(7,521)	(1,909)
Accounts payable	(2,979)	3,967
Accrued expenses and other liabilities	21,680	1,289
Deferred rent	1,376	(46)
Deferred revenue	7,976	(818)
Net cash used in operating activities	(72,165)	(42,300)
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from sale of property and equipment	37
Purchases of property and equipment	(12,870)	(6,786)
Net cash used in investing activities	(12,833)	(6,786)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from business combination, net of of transaction costs	78,543
Proceeds from issuance of convertible debt - PIPE Investors	21,750
Proceeds from stock option exercises	336	30
Proceeds from secured debt, net of issuance costs and security deposits		7,084
Principal payments on debt	(2,732)	(265)
Exercise of public warrants	1,209
Repayments of tenant improvement allowance	(136)	(79)
Principal payments on capital lease obligations	(327)	(325)
Net cash provided by financing activities	98,643	6,445
NET INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	13,645	(42,641)
Cash, cash equivalents and restricted cash, beginning of period	31,808	95,148
Cash, cash equivalents and restricted cash, end of period	45,453	52,507
SUPPLEMENTAL DISCLOSURE OF CASH-FLOW INFORMATION
Cash paid for interest	1,303	203
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES
Property and equipment included in accrued expenses and accounts payable	1,218	2,930
Conversion of convertible debt to equity	53,541
Legacy GreenLight cashless warrant exercises	1,643
Warrant liabilities assumed in the Business Combination	$ 1,341
Deferred financing costs in accrued expenses and accounts payable		559
Non-cash equipment financing issuance costs		$ 138