Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Cash flows from operating activities:
Net loss	$ (19,011)	$ (12,941)	$ (55,366)	$ (33,592)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization			1,029	435
Accretion and amortization of marketable securities, net			(621)	378
Amortization of right-of-use assets			580
Asset impairment			235
Stock-based compensation expense			8,084	2,784
Fair value adjustment of contingent stock liability				735
Changes in operating assets and liabilities:
Prepaid and other current assets			(1,634)	(2,229)
Other assets			(7)	(92)
Accounts payable			(215)	210
Accrued expenses			1,260	1,213
Operating lease liability			(423)
Other liabilities			91
Net cash used in operating activities			(46,987)	(30,158)	$ (40,000)
Cash flows from investing activities:
Purchases of property and equipment			(2,774)	(1,248)
Purchases of marketable securities			(140,588)	(210,789)
Maturities of marketable securities			190,021	114,929
Net cash provided by (used in) investing activities			46,659	(97,108)
Cash flows from financing activities:
Proceeds from isuance of common stock				139,523
Payment of partial settlement of contingent stock liability				(277)
Proceeds from exercise of stock options			105	111
Net cash provided by financing activities			182	136,988
Net increase (decrease) in cash and cash equivalents			(146)	9,722
Cash and cash equivalents at beginning of period			18,614	17,589	17,589
Cash and cash equivalents at end of period	$ 18,468	$ 27,311	18,468	27,311	$ 18,614
Supplemental disclosure of non-cash investing and financing activities:
Property and equipment additions included in accounts payable and accrued expenses			178	252
Deferred issuance costs included in accounts payable and accrued expenses			81
Issuance of shares of common stock in partial settlement of conttingent stock liability				831
2021 Employee Stock Purchase Plan
Cash flows from financing activities:
Proceeds from isuance of common stock			$ 77
Common Stock
Cash flows from financing activities:
Common stock issuance costs				$ (2,369)