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Note 4 - Allowance for Credit Losses (Details Textual) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023 | Jun. 30, 2023 | Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss | $ 12,704 | $ 8,896 | $ 11,974 |  | $ 7,446
Financing Receivable, Modified, Accumulated | 0 |  | 0 |  |
Financing Receivable, Modified, Subsequent Default | 0 |  | 0 |  |
Off-Balance-Sheet, Credit Loss, Liability, Credit Loss Expense (Reversal) | 42 | 36 |  |  |
Other Liabilities [Member] |  |  |  |  |
Off-Balance-Sheet, Credit Loss, Liability | 371 | $ 189 |  |  |
TDR Loans [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | 0 |  |  | $ 0 |
Collateral Pledged [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss | $ 0 |  | $ 0 |  |

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