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Note 5 - Fair Value Measurements (Details Textual) - USD ($) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2024 | Dec. 31, 2023
Estimated Selling Costs of Impaired Loans |  | $ 1,100,000 | $ 843,000
Mandatorily Redeemable Securities | $ 8,000,000 | 8,000,000 |
Notes Payable, Other Payables [Member] |  |  |
Debt Instrument, Basis Spread on Variable Rate | 1.67% |  |
Other Borrowings [Member] |  |  |
Notes Payable, Total | $ 8,200,000 | $ 8,200,000 |

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