Note 3 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
Sep. 30, 2024 |
|
| Accounts Receivable, Allowance for Credit Loss | $ 0 | $ 0 | $ 0 | ||
| Advertising Expense | 400 | $ 2,600 | 1,200 | $ 16,200 | |
| Cash, Uninsured Amount | $ 100 | $ 100 | $ 10,000 | ||
| Chief Executive Officer [Member] | Minimum [Member] | |||||
| Share-Based Compensation Arrangement by Share-Based Payment Award, Percentage of Outstanding Stock Maximum | 1.00% | ||||
| Chief Executive Officer [Member] | Maximum [Member] | |||||
| Share-Based Compensation Arrangement by Share-Based Payment Award, Percentage of Outstanding Stock Maximum | 3.00% | ||||