Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Total	2022 Annual Incentive Plan	A and R Plan	Preferred Stock Redeemable Convertible Preferred Stock	Common Stock	Common Stock 2022 Annual Incentive Plan	Common Stock A and R Plan	Additional Paid-In Capital	Additional Paid-In Capital 2022 Annual Incentive Plan	Additional Paid-In Capital A and R Plan	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning Balance, Shares (in shares) at Mar. 31, 2021				209,181,855	124,529,784
Beginning Balance at Mar. 31, 2021	$ (595,619)			$ 837,351	$ 12			$ 381,607			$ 0	$ (977,238)
Preferred stock conversion (in shares)				(209,181,855)	209,181,855
Preferred stock conversion	837,351			$ (837,351)	$ 21			837,330
Issuance of common stock upon Merger( in shares)					46,901,747
Issuance of common stock upon Merger (net of transaction costs of $33,726)	200,579				$ 5			200,574
Issuance of PIPE shares (related party amount of $25,000) (in shares)					25,000,000
Issuance of PIPE shares (related party amount of $25,000)	250,000				$ 3			249,997
Issuance of common stock upon exercise of stock options (in shares)					5,808,526
Issuance of common stock upon exercise of stock options	16,831							16,831
Issuance of common stock for acquisition of business (in shares)					30,572,268
Issuance of common stock for acquisition of business	322,845				$ 3			322,842
Issuance of common stock for Class A common stock warrant exercise (in shares)					6,016,347
Issuance of common stock for Class A common stock warrant exercise	42,356				$ 1			42,355
Issuance of common stock upon release of RSUs (in shares)					801,794
Stock-based compensation expense	58,624							58,624
Other comprehensive income (loss)	179										179
Net loss	(217,490)											(217,490)
Ending Balance, Shares (in shares) at Mar. 31, 2022				0	448,812,321
Ending Balance at Mar. 31, 2022	915,656			$ 0	$ 45			2,110,160			179	(1,194,728)
Issuance of common stock upon exercise of stock options (in shares)					2,748,796
Issuance of common stock upon exercise of stock options	4,203							4,203
Issuance of common stock upon release of RSUs (in shares)					7,062,152
Issuance of common stock upon release of RSUs	0				$ 1			(1)
Net share settlements for stock-based minimum tax withholdings (in shares)					(65,620)
Net share settlements for stock-based minimum tax withholdings	(197)							(197)
Issuance of common stock under employee stock purchase plan (in shares)					2,642,313
Issuance of common stock under employee stock purchase plan	6,463							6,463
Stock-based compensation expense	100,269							100,269
Other comprehensive income (loss)	(799)										(799)
Net loss	(311,656)											(311,656)
Ending Balance, Shares (in shares) at Mar. 31, 2023					461,199,962
Ending Balance at Mar. 31, 2023	$ 713,939				$ 46			2,220,897			(620)	(1,506,384)
Issuance of common stock upon exercise of stock options (in shares)	2,082,713				2,082,713
Issuance of common stock upon exercise of stock options	$ 909							909
Issuance of common stock upon release of RSUs (in shares)						9,019,049	12,684,049
Issuance of common stock upon release of RSUs		$ 18,730	$ 0			$ 1	$ 1		$ 18,729	$ (1)
Net share settlements for stock-based minimum tax withholdings (in shares)					(195,951)
Net share settlements for stock-based minimum tax withholdings	(230)							(230)
Issuance of common stock under employee stock purchase plan (in shares)					5,329,571
Issuance of common stock under employee stock purchase plan	3,263				$ 1			3,262
Stock-based compensation expense	117,993							117,993
Other comprehensive income (loss)	620										620
Net loss	(666,704)											(666,704)
Ending Balance, Shares (in shares) at Mar. 31, 2024					490,119,393
Ending Balance at Mar. 31, 2024	$ 188,520				$ 49			$ 2,361,559			$ 0	$ (2,173,088)