Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment
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 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]
Unrealized gain (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 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 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 gain (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)
Beginning balance (in shares) at Dec. 31, 2022			225,707,557
Beginning balance at Dec. 31, 2022	954,481		$ 22	2,567,723	(3,559)	(1,609,705)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock from exercise of options (in shares)			22,230
Issuance of common stock release of RSU and SVAs (in shares)			654,949
Stock-based compensation	16,805			16,805
Unrealized gain (loss) on available-for-sale debt securities, net	403				403
Foreign currency translation adjustment	919				919
Net loss	(81,212)					(81,212)
Ending balance (in shares) at Mar. 31, 2023			226,384,736
Ending balance at Mar. 31, 2023	891,396		$ 22	2,584,528	(2,237)	(1,690,917)
Beginning balance (in shares) at Dec. 31, 2022			225,707,557
Beginning balance at Dec. 31, 2022	954,481		$ 22	2,567,723	(3,559)	(1,609,705)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Unrealized gain (loss) on available-for-sale debt securities, net	(1,422)
Foreign currency translation adjustment	517
Net loss	(220,687)
Ending balance (in shares) at Sep. 30, 2023			229,577,178
Ending balance at Sep. 30, 2023	771,370		$ 22	2,606,204	(4,464)	(1,830,392)
Beginning balance (in shares) at Mar. 31, 2023			226,384,736
Beginning balance at Mar. 31, 2023	891,396		$ 22	2,584,528	(2,237)	(1,690,917)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock from exercise of options (in shares)			31,626
Issuance of common stock from exercise of options	30			30
Issuance of common stock release of RSU and SVAs (in shares)			1,744,091
Compensatory stock issuances (in shares)			175,816
Stock-based compensation	10,959			10,959
Unrealized gain (loss) on available-for-sale debt securities, net	(2,337)				(2,337)
Foreign currency translation adjustment	(1,864)				(1,864)
Net loss	(78,039)					(78,039)
Ending balance (in shares) at Jun. 30, 2023			228,336,269
Ending balance at Jun. 30, 2023	820,145		$ 22	2,595,517	(6,438)	(1,768,956)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock from exercise of options (in shares)			2,535
Issuance of common stock from exercise of options	3			3
Issuance of common stock release of RSU and SVAs (in shares)			1,263,374
Repurchase of common stock (in shares)			(25,000)
Repurchase of common stock	(67)			(67)
Stock-based compensation	10,751			10,751
Unrealized gain (loss) on available-for-sale debt securities, net	512				512
Foreign currency translation adjustment	1,462				1,462
Net loss	(61,436)					(61,436)
Ending balance (in shares) at Sep. 30, 2023			229,577,178
Ending balance at Sep. 30, 2023	$ 771,370		$ 22	$ 2,606,204	$ (4,464)	$ (1,830,392)