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Note 8 - Capital Shares - Schedule of Warrants (Details) - $ / shares | 12 Months Ended
--- | ---
Sep. 30, 2024 | Sep. 30, 2023
Balance, number of warrant shares (in shares) | 720,909 | 521,718
Class of Warrant or Right, Outstanding (in shares) | 609,717 | 720,909
Balance, warrants, weighted average exercise price (in dollars per share) | $ 19.51 | $ 28
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ 21.74 | $ 19.51
Issued, number of warrant shares (in shares) |  | 384,496
Issued, warrants, weighted average exercise price (in dollars per share) |  | $ 8.75
Exercised, number of warrant shares (in shares) |  | (100,760)
Exercised, warrants, weighted average exercise price (in dollars per share) |  | $ 7.65
Expired, number of warrant shares (in shares) | 111,192 | (84,545)
Expired, warrants, weighted average exercise price (in dollars per share) | $ 7.26 | $ 37.29
Expired, number of warrant shares (in shares) | 111,192 | (84,545)
Expired, warrants, weighted average exercise price (in dollars per share) | $ 7.26 | $ 37.29
Balance, number of warrant shares (in shares) | 609,717 | 720,909
Balance, warrants, weighted average exercise price (in dollars per share) | $ 21.74 | $ 19.51
Warrant One [Member] |  |
Class of Warrant or Right, Outstanding (in shares) | 1,687 |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ 22.4 |
Warrants and Rights Outstanding, Maturity Date | Jan. 31, 2025 |
Balance, number of warrant shares (in shares) | 1,687 |
Balance, warrants, weighted average exercise price (in dollars per share) | $ 22.4 |
Warrant Two [Member] |  |
Class of Warrant or Right, Outstanding (in shares) | 173,614 |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ 10.5 |
Warrants and Rights Outstanding, Maturity Date | Dec. 31, 2025 |
Balance, number of warrant shares (in shares) | 173,614 |
Balance, warrants, weighted average exercise price (in dollars per share) | $ 10.5 |
Warrant Three [Member] |  |
Class of Warrant or Right, Outstanding (in shares) | 15,627 |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ 56 |
Warrants and Rights Outstanding, Maturity Date | Feb. 28, 2026 |
Balance, number of warrant shares (in shares) | 15,627 |
Balance, warrants, weighted average exercise price (in dollars per share) | $ 56 |
Warrant Four [Member] |  |
Class of Warrant or Right, Outstanding (in shares) | 27,399 |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ 31.94 |
Warrants and Rights Outstanding, Maturity Date | Mar. 31, 2027 |
Balance, number of warrant shares (in shares) | 27,399 |
Balance, warrants, weighted average exercise price (in dollars per share) | $ 31.94 |
Warrant Five [Member] |  |
Class of Warrant or Right, Outstanding (in shares) | 391,390 |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ 24.64 |
Warrants and Rights Outstanding, Maturity Date | Sep. 30, 2027 |
Balance, number of warrant shares (in shares) | 391,390 |
Balance, warrants, weighted average exercise price (in dollars per share) | $ 24.64 |

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