Condensed Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Initial Public Offering	Private Placement	Series E Redeemable Convertible Preferred Stock	Series E-2 Redeemable Convertible Preferred Stock	Common Stock	Common Stock Initial Public Offering	Common Stock Private Placement	Additional Paid-in Capital	Additional Paid-in Capital Initial Public Offering	Additional Paid-in Capital Private Placement	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment
Beginning Balance (in shares) at Dec. 31, 2020	102,074,703
Beginning Balance at Dec. 31, 2020	$ 664,791
Increase (Decrease) in Temporary Equity [Roll Forward]
Issuance of redeemable convertible preferred stock, net of issuance costs (in shares)					4,650,999
Issuance of redeemable convertible preferred stock, net of issuance costs					$ 61,631
Issuance of redeemable convertible preferred stock from the exercise of warrants (in shares)					9,477,073	4,331,644
Issuance of redeemable convertible preferred stock from the exercise of warrants					$ 379,084	$ 173,275
Accretion of redeemable convertible preferred stock to redemption value	$ 4,135
Ending Balance (in shares) at Mar. 31, 2021	120,534,419
Ending Balance at Mar. 31, 2021	$ 1,282,916
Beginning Balance (in shares) at Dec. 31, 2020							60,543,337
Beginning Balance at Dec. 31, 2020	(405,473)						$ 6			$ 0			$ (301)	$ (405,178)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock from exercise of options (in shares)							60,616
Issuance of common stock from exercise of options	1									1
Vesting of early exercised stock options	21									21
Accretion of redeemable convertible preferred stock to redemption value	(4,135)									(4,135)
Stock-based compensation	6,289									6,289
Foreign currency translation adjustment	911												911
Net loss	(385,160)													(385,160)
Ending Balance (in shares) at Mar. 31, 2021							60,603,953
Ending Balance at Mar. 31, 2021	$ (787,546)						$ 6			2,176			610	(790,338)
Beginning Balance (in shares) at Dec. 31, 2020	102,074,703
Beginning Balance at Dec. 31, 2020	$ 664,791
Ending Balance (in shares) at Sep. 30, 2021	0
Ending Balance at Sep. 30, 2021	$ 0
Beginning Balance (in shares) at Dec. 31, 2020							60,543,337
Beginning Balance at Dec. 31, 2020	(405,473)						$ 6			0			(301)	(405,178)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Unrealized loss on available-for-sale debt securities, net	0
Foreign currency translation adjustment	63
Net loss	(617,179)
Ending Balance (in shares) at Sep. 30, 2021							212,994,830
Ending Balance at Sep. 30, 2021	$ 1,410,039						$ 21			2,432,613			(238)	(1,022,357)
Beginning Balance (in shares) at Dec. 31, 2020	102,074,703
Beginning Balance at Dec. 31, 2020	$ 664,791
Beginning Balance (in shares) at Dec. 31, 2020							60,543,337
Beginning Balance at Dec. 31, 2020	(405,473)						$ 6			0			(301)	(405,178)
Ending Balance (in shares) at Dec. 31, 2021							221,833,195
Ending Balance at Dec. 31, 2021	$ 1,326,978	$ 191					$ 22			2,464,730			77	(1,137,851)	$ 191
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible Enumeration]	Accounting Standards Update 2016-02 [Member]
Beginning Balance (in shares) at Mar. 31, 2021	120,534,419
Beginning Balance at Mar. 31, 2021	$ 1,282,916
Increase (Decrease) in Temporary Equity [Roll Forward]
Conversion of redeemable convertible preferred stock in connection with initial public offering (in shares)			(120,534,419)
Conversion of redeemable convertible preferred stock in connection with initial public offering			$ (1,282,916)
Ending Balance (in shares) at Jun. 30, 2021	0
Ending Balance at Jun. 30, 2021	$ 0
Beginning Balance (in shares) at Mar. 31, 2021							60,603,953
Beginning Balance at Mar. 31, 2021	(787,546)						$ 6			2,176			610	(790,338)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Vesting of early exercised stock options	21									21
Conversion of redeemable convertible preferred stock to common stock in connection with initial public offering (in shares)								120,534,419
Conversion of redeemable convertible preferred stock to common stock in connection with initial public offering			1,282,916					$ 12			$ 1,282,904
Issuance of common stock (in shares)								27,027,027	874,999
Issuance of common stock			$ 1,027,374	$ 35,000				$ 3			$ 1,027,371	$ 35,000
Stock-based compensation	52,509									52,509
Foreign currency translation adjustment	(775)												(775)
Net loss	(116,529)													(116,529)
Ending Balance (in shares) at Jun. 30, 2021							209,040,398
Ending Balance at Jun. 30, 2021	$ 1,492,970						$ 21			2,399,981			(165)	(906,867)
Ending Balance (in shares) at Sep. 30, 2021	0
Ending Balance at Sep. 30, 2021	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock from exercise of options (in shares)							183,648
Issuance of common stock from exercise of options	529									529
Issuance of common stock related to release of RSU and SVAs (in shares)							3,770,784
Vesting of early exercised stock options	21									21
Stock-based compensation	32,082									32,082
Unrealized loss on available-for-sale debt securities, net	0
Foreign currency translation adjustment	(73)												(73)
Net loss	(115,490)													(115,490)
Ending Balance (in shares) at Sep. 30, 2021							212,994,830
Ending Balance at Sep. 30, 2021	1,410,039						$ 21			2,432,613			(238)	(1,022,357)
Beginning Balance (in shares) at Dec. 31, 2021							221,833,195
Beginning Balance at Dec. 31, 2021	1,326,978	191					$ 22			2,464,730			77	(1,137,851)	191
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock from exercise of options (in shares)							534,019
Issuance of common stock from exercise of options	871									871
Issuance of common stock related to release of RSU and SVAs (in shares)							537,980
Issuance of common stock under the Employee Stock Purchase Plan (in shares)							87,215
Issuance of common stock under the Employee Stock Purchase Plan	1,292									1,292
Vesting of early exercised stock options	21									21
Stock-based compensation	27,527									27,527
Foreign currency translation adjustment	199												199
Net loss	(111,903)													(111,903)
Ending Balance (in shares) at Mar. 31, 2022							222,992,409
Ending Balance at Mar. 31, 2022	1,245,176						$ 22			2,494,441			276	(1,249,563)
Beginning Balance (in shares) at Dec. 31, 2021							221,833,195
Beginning Balance at Dec. 31, 2021	$ 1,326,978	$ 191					$ 22			2,464,730			77	(1,137,851)	$ 191
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under the Employee Stock Purchase Plan (in shares)	249,831
Unrealized loss on available-for-sale debt securities, net	$ (2,086)
Foreign currency translation adjustment	(2,427)
Net loss	(333,659)
Ending Balance (in shares) at Sep. 30, 2022							225,096,947
Ending Balance at Sep. 30, 2022	1,068,766						$ 22			2,544,499			(4,436)	(1,471,319)
Beginning Balance (in shares) at Mar. 31, 2022							222,992,409
Beginning Balance at Mar. 31, 2022	1,245,176						$ 22			2,494,441			276	(1,249,563)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock from exercise of options (in shares)							262,548
Issuance of common stock from exercise of options	687									687
Issuance of common stock related to release of RSU and SVAs (in shares)							937,573
Vesting of early exercised stock options	21									21
Stock-based compensation	25,151									25,151
Foreign currency translation adjustment	(1,345)												(1,345)
Net loss	(108,595)													(108,595)
Ending Balance (in shares) at Jun. 30, 2022							224,192,530
Ending Balance at Jun. 30, 2022	1,161,095						$ 22			2,520,300			(1,069)	(1,358,158)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock from exercise of options (in shares)							125,175
Issuance of common stock from exercise of options	152									152
Issuance of common stock related to release of RSU and SVAs (in shares)							616,626
Issuance of common stock under the Employee Stock Purchase Plan (in shares)							162,616
Issuance of common stock under the Employee Stock Purchase Plan	994									994
Vesting of early exercised stock options	21									21
Stock-based compensation	23,032									23,032
Unrealized loss on available-for-sale debt securities, net	(2,086)												(2,086)
Foreign currency translation adjustment	(1,281)												(1,281)
Net loss	(113,161)													(113,161)
Ending Balance (in shares) at Sep. 30, 2022							225,096,947
Ending Balance at Sep. 30, 2022	$ 1,068,766						$ 22			$ 2,544,499			$ (4,436)	$ (1,471,319)