Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities
Net loss	$ (49,956)	$ (13,057)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation and amortization	215	222
Stock-based compensation expense	688	620
Warrant issuance costs	0
Warrant liability fair value adjustment	33,207	(1,228)
Changes in assets and liabilities
Prepaid expenses and other assets	1,142	95
Accounts payable	1,029	1,589
Deferred revenue	(1,425)	(1,092)
Accrued and other liabilities	(2,652)	(162)
Net cash used in operating activities	(17,752)	(12,890)
Cash flows from financing activities
Net cash provided by financing activities	0	19,291
Net change in cash, cash equivalents, and restricted cash	(17,752)	6,401
Cash, cash equivalents, and restricted cash at beginning of period	56,134	61,855
Cash, cash equivalents, and restricted cash at end of period	38,382	68,256
Direct Offering [Member]
Cash flows from financing activities
Proceeds from issuance of common stock and common stock warrants, net of issuance costs	0	19,168
At-the-market Offering [Member]
Cash flows from financing activities
Proceeds from issuance of common stock in at the market offering	$ 0	$ 123