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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