Statements of Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income [Member]	Accumulated Deficit [Member]	Redeemable Convertible Preferred Stock [Member]	Series B Redeemable Convertible Preferred Stock [Member]	Series C Redeemable Convertible Preferred Stock [Member]
Temporary equity, Beginning balance at Dec. 31, 2019						$ 53,174
Temporary equity, Beginning balance, shares at Dec. 31, 2019						15,714,283
Beginning balance at Dec. 31, 2019	$ (58,777)		$ 5,010		$ (63,787)
Beginning balance, shares at Dec. 31, 2019		664,431
Issuance of redeemable convertible preferred stock for cash (Note 8)							$ 68,401
Issuance of redeemable convertible preferred stock for cash (Note 8), shares							31,760,528
Issuance of redeemable convertible preferred stock upon conversion of convertible notes							$ 10,095	$ 84,897
Issuance of redeemable convertible preferred stock upon conversion of convertible notes, shares							4,673,388	24,926,685
Redeemable convertible preferred stock converted into shares of common stock ,values	216,567	$ 2	216,565			$ (216,567)
Initial public offering of common stock, net of $22,386 in issuance costs , values	255,339	$ 1	255,338
Initial public offering of common stock, net of $22,386 in issuance costs, shares		13,225,000
Exercise of common stock options and vesting of early exercised common stock options	55		55
Exercise of common stock options and vesting of early exercised common stock options, shares		53,745
Stock-based compensation	2,640		2,640
Net loss and comprehensive loss	(32,947)				(32,947)
Ending balance at Dec. 31, 2020	$ 382,877	$ 3	479,608		(96,734)
Ending balance, shares at Dec. 31, 2020	34,701,274	34,701,274
Redeemable convertible preferred stock converted into shares of common stock, shares		20,758,098				77,074,884
Exercise of common stock options and vesting of early exercised common stock options, shares	261,567
Exercise of common stock options, shares issued under the employee stock purchase plan, and vesting of early exercised common stock options	$ 1,555	$ 1	1,554
Exercise of common stock options, shares issued under the employee stock purchase plan, and vesting of early exercised common stock options, shares		406,377
Stock-based compensation	19,187		19,187
Net loss and comprehensive loss	(89,804)			$ (326)	(89,478)
Ending balance at Dec. 31, 2021	$ 313,815	$ 4	$ 500,349	$ (326)	$ (186,212)
Ending balance, shares at Dec. 31, 2021	35,107,651	35,107,651