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Note 3 - Loans (Details Textual) Pure in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2025 USD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | $ 171,683,000 | $ 164,458,000 | $ 153,317,000 | $ 146,297,000
Financing Receivable, Modified, Subsequent Default, Number of Contracts | 0 |  |  |
Unfunded Loan Commitment [Member] |  |  |  |
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest | $ 572,000 | 608,000 |  |
Financing Receivable, Credit Loss, Expense (Reversal) | $ 36,000 | $ 32,000 |  |

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