STATEMENTS OF CHANGES IN CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Thousands	Total	Series A Convertible Preferred Stock	Series B Convertible Preferred Stock	Series C Convertible Preferred Stock	Common Stock Voting Common Stock	Common Stock Non-voting Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Convertible preferred stock, Beginning balance at Dec. 31, 2019		$ 36,595	$ 29,848
Convertible preferred stock, Beginning balance (shares) at Dec. 31, 2019		11,736,119	7,628,846
Beginning balance at Dec. 31, 2019	$ (49,412)						$ 1,085		$ (50,497)
Beginning balance (shares) at Dec. 31, 2019					3,161,653
Issuance of common stock upon exercise of stock options	$ 100						100
Issuance of common stock upon exercise of stock options, (shares)	100,545				100,545
Sale of stock, net of offering costs	$ 166,630				$ 1		166,629
Sale of stock, net of offering costs, (shares)					9,573,750
Sale of convertible preferred stock, net of issuance costs			$ 29,942	$ 49,826
Sale of convertible preferred stock, net of issuance costs (shares)			7,628,846	3,443,612
Conversion of convertible preferred stock upon initial public offering	146,211	$ (36,595)	$ (59,790)	$ (49,826)	$ 2	$ 1	146,208
Conversion of convertible preferred stock upon initial public offering (shares)		(11,736,119)	(15,257,692)	(3,443,612)	19,327,052	11,110,371
Stock-based compensation expense, including issuance of RSAs	5,583						5,583
Stock-based compensation expense, including issuance of RSAs (shares)					432,301
Net loss	(56,929)								(56,929)
Ending balance at Dec. 31, 2020	212,183				$ 3	$ 1	319,605		(107,426)
Ending balance (shares) at Dec. 31, 2020					32,595,301	11,110,371
Issuance of common stock upon exercise of stock options	$ 3,504						3,504
Issuance of common stock upon exercise of stock options, (shares)	995,950				995,950
Sale of stock, net of offering costs	$ 161,412				$ 1		161,411
Sale of stock, net of offering costs, (shares)					2,583,334	291,666
Issuance of common stock under ESPP	272						272
Issuance of common stock under ESPP, (shares)					25,714
Unrealized gain (loss) on marketable securities, net of tax	(711)							$ (711)
Stock-based compensation expense, including issuance of RSAs	20,931						20,931
Net loss	(111,694)								(111,694)
Ending balance at Dec. 31, 2021	$ 285,897				$ 4	$ 1	$ 505,723	$ (711)	$ (219,120)
Ending balance (shares) at Dec. 31, 2021					36,200,299	11,402,037