Note 11 - Share-based Compensation - Composition of Stock-based Compensation Expense (Details) - USD ($) |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Share-based Payment Arrangement, Expense | $ 24,744,792 | $ 13,564,762 | $ 67,016,811 | $ 29,174,038 |
| Chief Executive Officer [Member] | ||||
| Share-based Payment Arrangement, Expense | 330,763 | 1,415,059 | (212,691) | (4,650,599) |
| Employees and Directors [Member] | ||||
| Share-based Payment Arrangement, Expense | 7,733,896 | 4,868,990 | 24,457,277 | 10,342,631 |
| Consultants [Member] | Equity Classified Awards [Member] | ||||
| Share-based Payment Arrangement, Expense | 0 | 1,681,508 | 4,347,207 | 2,954,081 |
| Consultants [Member] | Liability Classified Awards [Member] | ||||
| Share-based Payment Arrangement, Expense | $ 16,680,133 | $ 5,599,205 | $ 38,425,018 | $ 20,527,925 |