Net Loss per Share Attributable to Common Stockholders - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Details) - Common Stock Class A - shares	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Earnings Per Share Basic [Line Items]
Antidilutive securities excluded from computation of diluted net loss per share (in shares)	4,923,452	6,523,718	5,429,372
ESPP
Earnings Per Share Basic [Line Items]
Antidilutive securities excluded from computation of diluted net loss per share (in shares)	0	128,075	146,860
Outstanding stock options
Earnings Per Share Basic [Line Items]
Antidilutive securities excluded from computation of diluted net loss per share (in shares)	2,856,385	3,536,989	3,402,538
Unvested restricted stock units
Earnings Per Share Basic [Line Items]
Antidilutive securities excluded from computation of diluted net loss per share (in shares)	2,067,067	2,202,834	1,328,128
Shares subject to vesting
Earnings Per Share Basic [Line Items]
Antidilutive securities excluded from computation of diluted net loss per share (in shares)	0	0	128,804
AIP RSUs
Earnings Per Share Basic [Line Items]
Antidilutive securities excluded from computation of diluted net loss per share (in shares)	0	655,820	423,042