Stock-Based Compensation - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Options
Outstanding at beginning of period (in shares)	815,357
Granted (in shares)	2,493,700
Exercised (in shares)	0
Forfeited (in shares)	(69,415)
Expired (in shares)	0
Outstanding at end of period (in shares)	3,239,642	815,357
Weighted-Average Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 33.07
Granted (in dollars per share)	3.59
Exercised (in dollars per share)	0
Forfeited (in dollars per share)	36.09
Expired (in dollars per share)	0
Outstanding at end of period (in dollars per share)	$ 10.32	$ 33.07
Exercisable (in shares)	1,370,909
Exercisable (in dollars per share)	$ 19.26
Exercisable, Weighted Average Remaining Contractual Term	7 years 4 months 24 days
Vested and Expected to Vest
Outstanding (in shares)	3,239,642
Weighted Average Exercise Price (in dollars per share)	$ 10.32
Weighted-Average Remaining Contractual Term (Years)	8 years 4 months 24 days
Aggregate Intrinsic Value	$ 8
Outstanding, weighted average remaining contractual term	8 years 4 months 24 days	6 years 8 months 12 days
Outstanding, Aggregate Intrinsic Value	$ 8	$ 165
Exercisable, Aggregate Intrinsic Value	$ 8

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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- Definition

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.