Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash flows from operating activities
Net loss	$ (47,197)	$ (26,195)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation and amortization	664	746
Stock-based compensation expense	1,984	1,672
Warrant issuance costs	123
Warrant liability fair value adjustment	(1,410)	(0)
Changes in assets and liabilities
Accounts receivable	(6,000)	0
Prepaid expenses and other assets	(622)	(2,859)
Accounts payable	6,164	(512)
Deferred revenue	(1,663)	2,598
Accrued and other liabilities	(2,886)	716
Net cash used in operating activities	(50,843)	(23,834)
Cash flows from financing activities
Proceeds from issuance of common stock in connection with employee benefit plans	26	71
Proceeds from issuance of common stock in connection with exercise of options	0	285
Proceeds from issuance of common stock and common stock warrants in direct offering, net of issuance costs	19,171	20,866
Net cash provided by financing activities	19,320	30,804
Net change in cash, cash equivalents, and restricted cash	(31,523)	6,970
Cash, cash equivalents, and restricted cash at beginning of period	61,855	62,971
Cash, cash equivalents, and restricted cash at end of period	30,332	69,941
Supplemental disclosure of noncash items
Reclass to additional paid-in-capital upon exercise	8,590	0
At-the-market Offering [Member]
Cash flows from financing activities
Proceeds from issuance of common stock in at the market offering	$ 123	$ 9,582