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Stockholders' Equity - Stock-based Compensation Expense and Valuation Information - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Class Of Stock [Line Items] |  |  |  |  |
Total unrecognized compensation cost related to unvested stock option grants | $ 0.7 |  |  | $ 0.7 |
Expected term | 0 years | [1] | 6 years | 6 years | 6 years
Stock options [Member] |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Total unrecognized compensation cost related, weighted average period |  |  |  | 2 years 6 months 10 days |
Restricted stock units (RSUs) [Member] |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Total unrecognized compensation cost related, weighted average period |  |  |  | 1 year 2 months 12 days |
Restricted stock units (RSUs) [Member] | Maximum [Member] |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |
Unrecognized stock-based compensation expense | $ 0.1 |  |  | $ 0.1 |
[1] | There were no stock options granted during the three months ended September 30, 2023.

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