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 [Member] - shares	3 Months Ended		6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share Basic [Line Items]
Outstanding stock options	122,326,485	100,715,527	122,326,485	100,715,527
ESPP
Earnings Per Share Basic [Line Items]
Outstanding stock options	5,662,218	2,863,702	5,662,218	2,863,702
Employee Stock Option
Earnings Per Share Basic [Line Items]
Outstanding stock options	75,637,943	69,845,695	75,637,943	69,845,695
Restricted Stock Units
Earnings Per Share Basic [Line Items]
Outstanding stock options	40,725,010	24,961,669	40,725,010	24,961,669
Shares Subject to Vesting
Earnings Per Share Basic [Line Items]
Outstanding stock options	301,314	3,044,461	301,314	3,044,461