Note 3 - Inventories - Summary of Inventory (Details) - USD ($) |
Mar. 31, 2025 |
Mar. 31, 2024 |
|---|---|---|
| Raw materials | $ 488,268 | $ 454,412 |
| Finished goods | 68,403 | 85,719 |
| Totals | 556,671 | 540,131 |
| Current [Member] | ||
| Raw materials | 279,223 | 238,227 |
| Finished goods | 57,047 | 75,182 |
| Totals | 336,270 | 313,409 |
| Long Term [Member | ||
| Raw materials | 209,045 | 216,185 |
| Finished goods | 11,356 | 10,537 |
| Totals | $ 220,401 | $ 226,722 |