CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net loss	$ (21,353)	$ (16,667)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	440	350
Non-cash interest expense	53	38
Equity-based compensation expense	2,029	794
Change in fair value of warrant and derivative liabilities		15
Changes in operating assets and liabilities:
Prepaid and other assets	336	153
Operating lease right-of-use asset	92	78
Accounts payable	(820)	(2,838)
Accrued expenses and other liabilities	(1,427)	(4,627)
Operating lease liability	(185)	(30)
Net cash used in operating activities	(20,835)	(22,734)
Cash flows from investing activities:
Purchases of property and equipment	(254)	(170)
Net cash used in investing activities	(254)	(170)
Cash flows from financing activities:
Payments of finance lease	(21)	(21)
Proceeds from issuance of convertible preferred stock, net of issuance costs		144,886
Proceeds from exercise of stock options	16	25
Net cash (used in) provided by financing activities	(5)	144,890
(Decrease) increase in cash, cash equivalents and restricted cash	(21,094)	121,986
Cash, cash equivalents and restricted cash, beginning of period	199,606	20,789
Cash, cash equivalents and restricted cash, end of period	178,512	142,775
Supplemental cash flow disclosure:
Cash paid for interest	$ 119	125
Supplemental disclosure of non-cash activities:
Capital expenditures included in accounts payable or accrued expenses		249
Deferred offering costs included in accounts payable or accrued expenses		$ 201