Statements of Changes in Convertible Preferred Stock and Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Total	Series A Convertible Preferred Stock [Member]	Series A-1 Convertible Preferred Stock [Member]	Series B Convertible Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss
Opening balance at Dec. 31, 2019		$ 1,067	$ 16,333	$ 0
Opening balance at Dec. 31, 2019	$ (11,420)				$ 0	$ 8,220	$ (19,640)	$ 0
Opening balance (Shares) at Dec. 31, 2019		477,297	7,537,879	0	419,124
Issuance of milestone shares for cash, net of issuance costs				$ 39,253
Issuance of milestone shares for cash, net of issuance costs (Shares)				11,862,043
Reclassification of warrant liability upon exercise of preferred stock warrant	0
Share-based compensation	154					154		0
Net loss	(7,325)						(7,325)	0
Closing balance at Dec. 31, 2020		$ 1,067	$ 16,333	$ 39,253
Closing balance at Dec. 31, 2020	(18,591)				$ 0	8,374	(26,965)	0
Closing balance (Shares) at Dec. 31, 2020		477,297	7,537,879	11,862,043	419,124
Issuance of milestone shares for cash, net of issuance costs				$ 30,031
Issuance of milestone shares for cash, net of issuance costs (Shares)				7,908,027
Exercise of preferred stock warrant			$ 1,250
Exercise of preferred stock warrant (shares)			447,426
Reclassification of preferred stock tranche rights liability upon issuance of milestone shares				$ 81,190
Reclassification of warrant liability upon exercise of preferred stock warrant	5,380		$ 5,380
Exercise of common stock warrants	614					614
Exercise of common stock warrants (Shares)					137,446
Conversion of convertible preferred stock into common stock upon initial public offering	174,504	$ (1,067)	$ (22,963)	$ (150,474)	$ 3	174,501
Conversion of convertible preferred stock into common stock upon initial public offering, Shares		(477,297)	(7,985,305)	(19,770,070)	28,232,672
Issuance of common stock for cash, net of issuance costs of $15,445	168,556				$ 1	168,555
Issuance of common stock for cash, net of issuance costs of $15,445, Shares					11,499,998
Cashless exercise of common stock warrants					178,847
Stock options exercised	$ 15					15
Stock options exercised, Shares	5,183				5,183
Unrealized loss on marketable securities	$ (231)							(231)
Share-based compensation	922					922
Net loss	(100,606)						(100,606)
Closing balance at Dec. 31, 2021		$ 0	$ 0	$ 0
Closing balance at Dec. 31, 2021	$ 225,183				$ 4	$ 352,981	$ (127,571)	$ (231)
Closing balance (Shares) at Dec. 31, 2021		0	0	0	40,473,270