Common Stock and Preferred Stock - Schedule of Common Stock Reserved for Issuance (Detail) - shares	3 Months Ended	12 Months Ended
	Jun. 30, 2022	Mar. 31, 2022
Class Of Stock [Line Items]
Outstanding stock options	71,980,548	73,609,565
Total shares of common stock reserved	155,472,788	144,601,515
2021 Equity Incentive Plan
Class Of Stock [Line Items]
Shares available for future issuance under equity incentive plan	48,995,670	48,895,572
Employee Stock Purchase Plan
Class Of Stock [Line Items]
Shares available for future issuance under employee stock purchase plan	11,420,000	11,420,000
Restricted Stock Units [Member]
Class Of Stock [Line Items]
Outstanding restricted stock units	23,076,570	10,676,378