Condensed Consolidated Statements Of Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Total	Common Stock [Member]	Preferred Stock [Member] Redeemable Convertible Preferred Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income Loss	Accumulated Deficit [Member]
Beginning Balance at Mar. 31, 2020	$ (620,883)	$ 9	$ 755,083	$ 172,727		$ (793,619)
Beginning Balance, Shares at Mar. 31, 2020		101,652,799	198,274,933
Issuance of common stock upon exercise of stock options	29,092	$ 1		29,091
Issuance of common stock upon exercise of stock options, Shares		11,768,079
Issuance of common stock related to early exercise of stock options, shares		11,108,906
Issuance of Series F-1 redeemable convertible preferred stock at $7.56 per share, net of issuance costs of $232			$ 82,268
Issuance of Series F-1 redeemable convertible preferred stock at $7.56 per share, net of issuance costs of $232, Shares			10,906,922
Vesting Early Exercised Stock Options	91,046	$ 2		91,044
Stock-based compensation expense	88,745			88,745
Other comprehensive loss
Net loss	(183,619)					(183,619)
Ending Balance at Mar. 31, 2021	(595,619)	$ 12	$ 837,351	381,607		(977,238)
Ending Balance, Shares at Mar. 31, 2021		124,529,784	209,181,855
Preferred stock conversion	837,351	$ 21	$ (837,351)	837,330
Preferred stock conversion, shares		209,181,855	(209,181,855)
Issuance of common stock upon exercise of stock options	322,845	$ 3		322,842
Issuance of common stock upon exercise of stock options, Shares		30,572,268
Issuance of Common Stock for Class A Common Stock Warrant Exercise	42,356	$ 1		42,355
Issuance of Common Stock for Class A Common Stock Warrant Exercise, Shares		6,016,347
Issuance of common stock upon Merger	200,579	$ 5		200,574
Issuance of common stock upon Merger, Shares		46,901,747
Issuance of Private Investment in Public Equity ("PIPE") shares	250,000	$ 3		249,997
Issuance of Private Investment in Public Equity ("PIPE") shares, shares		25,000,000
Issuance of common stock related to early exercise of stock options	16,831			16,831
Issuance of common stock related to early exercise of stock options, shares		5,808,526
Issuance of common stock upon release of RSUs, shares		801,794
Vesting Early Exercised Stock Options
Stock-based compensation expense	58,624			58,624
Other comprehensive loss	179				$ 179
Net loss	(217,490)					(217,490)
Ending Balance at Mar. 31, 2022	915,656	$ 45		2,110,160	179	(1,194,728)
Ending Balance, Shares at Mar. 31, 2022		448,812,321
Issuance of common stock related to early exercise of stock options	$ 4,203			4,203
Issuance of common stock related to early exercise of stock options, shares	2,748,796	2,748,796
Issuance Of Common Stock Upon Release Of Rsus		$ 1		$ (1)
Issuance of common stock upon release of RSUs, shares		7,062,152
Net share settlements for stock-based minimum tax withholdings, value	(197)			(197)
Net share settlements for stock-based minimum tax withholdings, shares		$ (65,620)
Issuance of common stock under employee stock purchase plan, share		2,642,313
Issuance of common stock under employee stock purchase plan, value	$ 6,463			$ 6,463
Vesting Early Exercised Stock Options
Stock-based compensation expense	100,269			100,269
Other comprehensive loss	(799)				(799)
Net loss	(311,656)					(311,656)
Ending Balance at Mar. 31, 2023	$ 713,939	$ 46		$ 2,220,897	$ (620)	$ (1,506,384)
Ending Balance, Shares at Mar. 31, 2023		461,199,962