Note 5 - Inventory (Details Textual) - USD ($) |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
Mar. 31, 2025 |
Mar. 31, 2024 |
|
| Inventory Consumed for Research and Development Activities | $ 900,000 | $ 100,000 | $ 2,000,000 | $ 900,000 |
| Inventory Write-down | $ 800,000 | $ 0 | $ 838,765 | $ 0 |