Net Loss Per Share Attributable to Common Stockholders - Common Stock Equivalents Excluded from Calculation of Diluted Net Loss Per Share (Details) - Class A Common Stock - shares	3 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Earnings Per Share Basic [Line Items]
Antidilutive securities excluded from computation of diluted net loss per share (in shares)	135,491,235	114,127,969
ESPP
Earnings Per Share Basic [Line Items]
Antidilutive securities excluded from computation of diluted net loss per share (in shares)	2,380,043	2,776,927
Outstanding stock options
Earnings Per Share Basic [Line Items]
Antidilutive securities excluded from computation of diluted net loss per share (in shares)	64,832,199	68,386,690
Unvested restricted stock units
Earnings Per Share Basic [Line Items]
Antidilutive securities excluded from computation of diluted net loss per share (in shares)	68,278,993	42,629,558
Shares subject to vesting
Earnings Per Share Basic [Line Items]
Antidilutive securities excluded from computation of diluted net loss per share (in shares)	0	334,794