Stockholders' Equity - Schedule of Common Stock Reserved for Issuance (Detail) - shares	3 Months Ended	12 Months Ended
	Jun. 30, 2023	Mar. 31, 2023
Class Of Stock [Line Items]
Outstanding stock options	68,386,690	68,050,752
Total shares of common stock reserved	156,005,891	166,884,802
2021 Equity Incentive Plan
Class Of Stock [Line Items]
Remaining shares available for future issuance under 2021 Incentive Equity Plan	28,640,341	55,922,182
Employee Stock Purchase Plan
Class Of Stock [Line Items]
Remaining shares available for future issuance under Employee Stock Purchase Plan	16,349,302	16,349,302
Restricted Stock Units [Member]
Class Of Stock [Line Items]
Outstanding restricted stock units	42,629,558	26,562,566