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Note 7 - Income Taxes (Details Textual) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Income Tax Expense (Benefit) | $ 680 | $ 57
Effective Income Tax Rate Reconciliation, Percent | 14.80% | 6.00%
Supplemental Executive Retirement Plan (SERP) [Member] |  |
Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount |  | $ 200
Put Option [Member] |  |
Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount |  | $ 400

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