Note 10 - Share-based Compensation - Schedule of Allocated Expense 2 (Details) - USD ($) |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Share-based compensation expense | $ 577,969 | $ 1,669,428 | $ 1,738,286 | $ 6,567,376 |
| Location, Statement of Income, Balance [Axis]: us-gaap:GeneralAndAdministrativeExpense | ||||
| Share-based compensation expense | 451,788 | 1,290,912 | 1,356,846 | 4,914,586 |
| Location, Statement of Income, Balance [Axis]: us-gaap:ResearchAndDevelopmentExpense | ||||
| Share-based compensation expense | $ 126,181 | $ 378,516 | $ 381,440 | $ 1,662,839 |