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Stockholders' Equity - Schedule of Stock-based Compensation Expense (Details) - USD ($) | 3 Months Ended | 6 Months Ended
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Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |  |
Total stock-based compensation expense | $ 72,000 | $ 155,000 | $ 150,000 | $ 311,000
Research and development |  |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |  |
Total stock-based compensation expense | 13,000 | 25,000 | 26,000 | 51,000
General and administrative |  |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |  |
Total stock-based compensation expense | $ 59,000 | $ 130,000 | $ 124,000 | $ 260,000

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