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Note 13 - Related Party Transactions (Details Textual) - USD ($) $ in Thousands |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jun. 08, 2023 | May 01, 2023 | Dec. 31, 2023 | Dec. 31, 2022 | Sep. 30, 2024 | Sep. 30, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures (in shares) | 327,421 |  |  |  |  |
Director [Member] |  |  |  |  |  |
Long-Term Debt |  |  | $ 175 | $ 175 | $ 175 | $ 175
Accounts Payable |  |  | 0 | 2 |  |
Executive Officer [Member] | Consulting Fees [Member] |  |  |  |  |  |
Accounts Payable |  |  | 106 | 56 |  |
Related Party Transaction, Amounts of Transaction |  |  | $ 222 | 420 |  |
Stock Issued During Period, Shares, Issued for Services (in shares) |  | 29,636 |  |  |  |
Related Party [Member] |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Net of Forfeitures (in shares) | 288,794 |  |  |  |  |
Related Party [Member] | Consulting Fees [Member] |  |  |  |  |  |
Stock Issued During Period, Shares, Issued for Services (in shares) |  | 29,636 |  |  |  |
Conversion of Director Notes Into Common Stock [Member] |  |  |  |  |  |
Debt Conversion, Original Debt, Amount |  |  |  | $ 320 |  |
Debt Conversion, Converted Instrument, Shares Issued (in shares) |  |  |  | 11,088 |  |

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