Stock-Based Compensation - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Options
Outstanding at beginning of period (in shares)	3,239,642
Granted (in shares)	1,831,827
Exercised (in shares)	(2,330)
Forfeited (in shares)	(482,103)
Expired (in shares)	(129,668)
Outstanding at end of period (in shares)	4,457,368	3,239,642
Weighted-Average Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 10.32
Granted (in dollars per share)	2.31
Exercised (in dollars per share)	3.32
Forfeited (in dollars per share)	2.81
Expired (in dollars per share)	12.26
Outstanding at end of period (in dollars per share)	$ 7.78	$ 10.32
Exercisable (in shares)	2,419,193
Exercisable (in dollars per share)	$ 12.96
Exercisable, Weighted Average Remaining Contractual Term	6 years 9 months 18 days
Vested and Expected to Vest
Outstanding (in shares)	4,457,368
Weighted Average Exercise Price (in dollars per share)	$ 7.78
Weighted-Average Remaining Contractual Term (Years)	7 years 9 months 18 days
Aggregate Intrinsic Value	$ 0
Outstanding, weighted average remaining contractual term	7 years 9 months 18 days	8 years 4 months 24 days
Outstanding, Aggregate Intrinsic Value	$ 0	$ 0
Exercisable, Aggregate Intrinsic Value	$ 0

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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Period Type:	instant

- 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.