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Note 8 - Capital Shares (Details Textual) - USD ($) $ / shares in Units, Pure in Thousands |  |  |  | 1 Months Ended | 7 Months Ended | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 04, 2024 | Sep. 30, 2024 | Nov. 02, 2022 | Nov. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Oct. 31, 2024 | Aug. 31, 2024 | Mar. 31, 2023 | Mar. 27, 2023 | Sep. 30, 2022 | Aug. 31, 2022
Stock Issued During Period, Value, New Issues |  |  |  |  |  | $ 729,387 |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights |  | $ 21.74 |  |  | $ 19.51 | $ 21.74 | $ 19.51 |  |  |  |  | $ 28 |
Equity Offering, Maximum Amount |  |  |  |  |  |  |  |  |  |  |  |  | $ 150,000,000
Class of Warrant or Right, Outstanding, Weighted Average Remaining Contractual Term |  |  |  |  |  | 29 months |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period |  |  |  |  |  | 0 | 0 |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value |  | $ 200 |  |  |  | $ 200 |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term |  |  |  |  |  | 80 months |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price |  | $ 27.55 |  |  |  | $ 27.55 |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value Per Share |  | $ 66 |  |  |  | $ 66 |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term |  |  |  |  |  | 76 months |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Number of Shares |  | 54,652 |  |  |  | 54,652 |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Option, Nonvested, Weighted Average Exercise Price |  | $ 9.24 |  |  |  | $ 9.24 |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Intrinsic Value Per Share |  | $ 134 |  |  |  | $ 134 |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Weighted Average Remaining Contractual Term |  |  |  |  |  | 102 months |  |  |  |  |  |  |
Share-Based Payment Arrangement, Expense |  |  |  |  |  | $ 500,000 | $ 1,200,000 |  |  |  |  |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount |  | $ 100,000 |  |  |  | $ 100,000 |  |  |  |  |  |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition |  |  |  |  |  | 24 months |  |  |  |  |  |  |
The 2019 Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized |  | 642,737 |  |  |  | 642,737 |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant |  | 141,099 |  |  |  | 141,099 |  |  |  |  |  |  |
Share-Based Payment Arrangement, Option [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term |  |  |  |  |  | 5 years | 5 years |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period |  |  |  |  |  | 10 years |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate |  |  |  |  |  | 0.00% | 0.00% |  |  |  |  |  |
Share-Based Payment Arrangement, Option [Member] | The 2019 Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period |  | 10 years |  |  |  |  |  |  |  |  |  |  |
Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period |  |  |  |  |  | 10 years |  |  |  |  |  |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount |  | $ 0 |  |  |  | $ 0 |  |  |  |  |  |  |
Canaccord [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues |  |  |  |  | 171,916 |  |  |  |  |  |  |  |
Stock Issued During Period, Value, New Issues |  |  |  |  | $ 700,000 |  |  |  |  |  |  |  |
Equity Offering, Maximum Amount |  |  |  |  |  |  |  |  | $ 20,000,000 | $ 20,000,000 |  |  |
Equity Offering, Limitation Amount |  |  |  |  |  |  |  |  | $ 8,400,000 | $ 8,400,000 |  |  |
Class A Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |  |  | 192,248 |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights |  |  | $ 10.5 |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Maturity Date |  |  | Dec. 23, 2025 |  |  |  |  |  |  |  |  |  |
Class B Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |  |  | 192,248 |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights |  |  | $ 7 |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Maturity Date |  |  | Dec. 23, 2023 |  |  |  |  |  |  |  |  |  |
Warrants Issued in Private Placement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding |  |  | $ 1,200,000 |  |  |  |  |  |  |  |  |  |
Private Placement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues |  |  | 384,475 | 384,475 |  |  |  |  |  |  |  |  |
Proceeds from Issuance or Sale of Equity |  |  | $ 2,900,000 | $ 3,000,000 |  |  |  |  |  |  |  |  |
Stock Issued During Period, Value, New Issues |  |  | $ 2,700,000 |  |  |  |  |  |  |  |  |  |
Equity Distribution Agreement [Member] | Canaccord [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues |  |  |  |  |  | 171,916 | 196,401 |  |  |  |  |  |
Stock Issued During Period, Value, New Issues |  |  |  |  |  | $ 700,000 | $ 1,300,000 |  |  |  |  |  |
Equity Offering, Maximum Amount |  |  |  |  |  |  |  |  |  |  | $ 20,000,000 |  |
Equity Offering, Limitation Amount |  |  |  |  |  |  |  |  |  |  | $ 8,400,000 |  |
At The Market Offering Agreement [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues | 220,269 |  |  |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Value, New Issues | $ 600,000 |  |  |  |  |  |  |  |  |  |  |  |
Equity Offering, Maximum Amount | $ 3,870,000 |  |  |  |  |  |  | $ 3,870,000 |  |  |  |  |

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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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