Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders’ Equity (Deficit) - USD ($) $ in Thousands	Total	Series E	Series F	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment
Redeemable convertible preferred stock, beginning balance (in shares) at Dec. 31, 2018	79,472,483
Redeemable convertible preferred stock, beginning balance at Dec. 31, 2018	$ 155,645
Redeemable convertible preferred stock, ending balance balance (in shares) at Dec. 31, 2019	79,472,483
Redeemable convertible preferred stock, ending balance at Dec. 31, 2019	$ 155,645
Beginning balance (in shares) at Dec. 31, 2018					26,595,462
Beginning balance at Dec. 31, 2018	(183,568)			$ 6,733	$ 0	$ 54,399	$ (54)	$ (237,913)	$ 6,733
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	9,208					9,208
Unrealized gain on investments	54						54
Exercise of stock options (in shares)					4,024,143
Exercise of stock options	11,265					11,265
Vesting of early-exercised stock options	421					421
Cumulative translation adjustment	0
Net loss	(69,703)							(69,703)
Ending balance (in shares) at Dec. 31, 2019					30,619,605
Ending balance at Dec. 31, 2019	$ (225,590)				$ 0	75,293	0	(300,883)
Increase (Decrease) in Temporary Equity [Roll Forward]
Issuance of convertible preferred stock, net of issuance costs (in shares)		2,569,043	3,349,812
Issuance of Convertible Preferred Stock, net of issuance costs		$ 39,948	$ 78,511
Redeemable convertible preferred stock, ending balance balance (in shares) at Dec. 31, 2020	85,391,338	2,569,043	3,349,812
Redeemable convertible preferred stock, ending balance at Dec. 31, 2020	$ 274,104	$ 39,948	$ 78,511
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	32,135					32,135
Unrealized gain on investments	0
Exercise of stock options (in shares)					5,007,898
Exercise of stock options	10,383					10,383
Vesting of early-exercised stock options	7					7
Cumulative translation adjustment	0
Net loss	(77,620)							(77,620)
Ending balance (in shares) at Dec. 31, 2020					35,627,503
Ending balance at Dec. 31, 2020	$ (260,685)				$ 0	117,818	0	(378,503)
Increase (Decrease) in Temporary Equity [Roll Forward]
Exercise of Series A-1 redeemable convertible preferred stock warrants (in shares)	12,595
Exercise of Series A-1 redeemable convertible preferred stock warrants	$ 163
Conversion of redeemable convertible preferred stock to common stock upon initial public offering (in shares)	(85,403,933)
Conversion of redeemable convertible preferred stock to common stock upon initial public offering	$ (274,267)
Redeemable convertible preferred stock, ending balance balance (in shares) at Dec. 31, 2021	0
Redeemable convertible preferred stock, ending balance at Dec. 31, 2021	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of redeemable convertible preferred stock to common stock upon initial public offering (in shares)					85,403,933
Conversion of redeemable convertible preferred stock to common stock upon initial public offering	274,267				$ 1	274,266
Issuance of common stock in connection with initial public offering, net of issuance costs and underwriting discount (in shares)					15,150,000
Issuance of common stock in connection with initial public offering, net of issuance costs and underwriting discount	408,416					408,416
Stock-based compensation	36,701					36,701
Unrealized gain on investments	0
Exercise of stock options (in shares)					2,921,957
Exercise of stock options	11,028					11,028
Restricted stock issued for business combination (in shares)					61,300
Cumulative translation adjustment	(1)						(1)
Net loss	(80,026)							(80,026)
Ending balance (in shares) at Dec. 31, 2021					139,164,693
Ending balance at Dec. 31, 2021	$ 389,700				$ 1	$ 848,229	$ (1)	$ (458,529)