Note 4 - Inventories - Schedule of Inventory (Details) - USD ($) |
Aug. 31, 2026 |
Feb. 28, 2026 |
|---|---|---|
| Inventory, Gross | $ 10,395,000 | $ 9,166,000 |
| Inventory, Valuation Reserves | (5,066,000) | (5,034,000) |
| Inventory, Net | 5,329,000 | 4,132,000 |
| Raw Materials [Member] | ||
| Inventory, Gross | 4,122,000 | 3,275,000 |
| Inventory, Valuation Reserves | (558,000) | (534,000) |
| Inventory, Net | 3,564,000 | 2,741,000 |
| Work-in-process [Member] | ||
| Inventory, Gross | 5,498,000 | 5,245,000 |
| Inventory, Valuation Reserves | (4,022,000) | (4,017,000) |
| Inventory, Net | 1,476,000 | 1,228,000 |
| Finished Goods [Member] | ||
| Inventory, Gross | 775,000 | 646,000 |
| Inventory, Valuation Reserves | (486,000) | (483,000) |
| Inventory, Net | $ 289,000 | $ 163,000 |