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Business Segment Information - Summary of Disaggregated Expense (Parenthetical) (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Segment Reporting Information [Line Items] |  |  |  |
Stock-based compensation | $ 72,000 | $ 155,000 | $ 150,000 | $ 311,000
Research and Development Expense [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Stock-based compensation | 13,000 | 25,000 | 26,000 | 51,000
Depreciation and amortization expense | 55,000 | 57,000 | 111,000 | 115,000
Selling, General and Administrative Expenses [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Stock-based compensation | 59,000 | 130,000 | 124,000 | 260,000
Depreciation and amortization expense | $ 4,000 | $ 12,000 | $ 9,000 | $ 23,000

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