Note 3 - Inventories (Details Textual) - USD ($) |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2025 |
Sep. 30, 2024 |
Sep. 30, 2025 |
Sep. 30, 2024 |
|
| Inventory Abnormal Production Costs | $ 56,000 | $ 53,000 | ||
| Non Inventoriable Fixed Costs | $ 0 | $ 15,000 | $ 0 | $ 83,000 |