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Note 9 - Stock Based Compensation (Tables) | 12 Months Ended
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Sep. 30, 2024
Notes Tables |
Share-Based Payment Arrangement, Option, Activity [Table Text Block] |
|  |  |  |  |  |  |  |  |  | Weighted-average |  |  |  |  |
|  |  |  |  |  |  |  |  |  | remaining |  |  | Aggregate |
|  |  |  |  |  | Weighted-average |  |  | contractual term |  |  | intrinsic value |
|  | Number of shares |  |  | exercise price |  |  | (in years) |  |  | (in thousands) |
Outstanding at September 30, 2022 |  |  | 55,656 |  |  | $ | 151.10 |  |  |  | 4.55 |  |  | $ | - |
Granted |  |  | 7,233 |  |  |  | 11.51 |  |  |  | - |  |  |  |  |
Exercised |  |  | - |  |  |  | - |  |  |  |  |  |  |  |  |
Forfeited |  |  | (21,124 | ) |  |  | 88.12 |  |  |  |  |  |  |  |  |
Outstanding at September 30, 2023 |  |  | 41,765 |  |  |  | 144.43 |  |  |  | 3.65 |  |  |  | - |
Granted |  |  | 8,000 |  |  |  | 0.86 |  |  |  | - |  |  |  |  |
Exercised |  |  | - |  |  |  | - |  |  |  |  |  |  |  |  |
Forfeited |  |  | (5,730 | ) |  |  | 117.35 |  |  |  |  |  |  |  |  |
Outstanding at September 30, 2024 |  |  | 44,035 |  |  |  | 123.58 |  |  |  | 3.14 |  |  |  | - |
Exercisable at September 30, 2024 |  |  | 44,035 |  |  | $ | 123.58 |  |  |  | 3.14 |  |  | $ | - |

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