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Note 2 - Securities Available for Sale (Details Textual) - USD ($) | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Jan. 01, 2024 | Dec. 31, 2023
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss |  |  | $ 297,000 | $ 351,000
Debt Securities, Available-for-sale, Total | $ 79,799,000 |  |  | 82,135,000
Proceeds from Sale of Debt Securities, Available-for-Sale | $ 0 | $ 0 |  |
Asset Pledged as Collateral [Member] |  |  |  |
Debt Securities, Available-for-sale, Total |  |  | $ 0 | $ 0

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