Net Loss Per Share Attributable to Common Stockholders - Common Stock Equivalents Excluded from Calculation of Diluted Net Loss Per Share (Details) - shares	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Liability RSU awards
Earnings Per Share Basic [Line Items]
Antidilutive securities excluded from computation of diluted net loss per share (in shares)	0	724,506	0	724,506
Class A Common Stock
Earnings Per Share Basic [Line Items]
Antidilutive securities excluded from computation of diluted net loss per share (in shares)	120,665,018	104,083,018	120,665,018	104,083,018
Class A Common Stock | ESPP
Earnings Per Share Basic [Line Items]
Antidilutive securities excluded from computation of diluted net loss per share (in shares)	5,670,804	3,713,166	5,670,804	3,713,166
Class A Common Stock | Outstanding stock options
Earnings Per Share Basic [Line Items]
Antidilutive securities excluded from computation of diluted net loss per share (in shares)	73,646,882	69,089,621	73,646,882	69,089,621
Class A Common Stock | Unvested restricted stock units
Earnings Per Share Basic [Line Items]
Antidilutive securities excluded from computation of diluted net loss per share (in shares)	41,347,332	27,745,454	41,347,332	27,745,454
Class A Common Stock | Shares subject to vesting
Earnings Per Share Basic [Line Items]
Antidilutive securities excluded from computation of diluted net loss per share (in shares)	0	2,810,271	0	2,810,271