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Note 15 - Fair Value Measurements - Assets and Liabilities at Fair Value on Recurring Basis (Details) $ in Thousands | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
--- | --- | ---
Securities available for sale |  | $ 618,601 | $ 656,852
Interest Rate Loan Contract [Member] | Fair Value, Recurring [Member] |  |  |
Derivative Asset |  | $ 3 |
Forward Sale Commitment [Member] | Valuation, Market Approach [Member] | Measurement Input, Current Reference Price [Member] | Minimum [Member] |  |  |
Derivative Liability, Measurement Input | [1] | 1.016 |
Forward Sale Commitment [Member] | Valuation, Market Approach [Member] | Measurement Input, Current Reference Price [Member] | Maximum [Member] |  |  |
Derivative Liability, Measurement Input | [1] | 1.0264 |
Forward Sale Commitment [Member] | Fair Value, Recurring [Member] |  |  |
Derivative Liability |  | $ (4) |
Fair Value, Inputs, Level 1 [Member] |  |  |
Securities available for sale |  | 0 | 0
Fair Value, Inputs, Level 2 [Member] |  |  |
Securities available for sale |  | 618,601 | 656,852
Fair Value, Inputs, Level 3 [Member] |  |  |
Securities available for sale |  | 0 | 0
Fair Value, Inputs, Level 3 [Member] | Interest Rate Loan Contract [Member] | Fair Value, Recurring [Member] |  |  |
Derivative Asset |  | 3 |
Fair Value, Inputs, Level 3 [Member] | Forward Sale Commitment [Member] | Fair Value, Recurring [Member] |  |  |
Derivative Liability |  | (4) |
US Government Agencies Debt Securities [Member] |  |  |
Securities available for sale |  | 311,844 | 336,575
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Securities available for sale |  | 0 | 0
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Securities available for sale |  | 311,844 | 336,575
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Securities available for sale |  | 0 | 0
US States and Political Subdivisions Debt Securities [Member] |  |  |
Securities available for sale |  | 149,893 | 152,200
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Securities available for sale |  | 0 | 0
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Securities available for sale |  | 149,893 | 152,200
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Securities available for sale |  | 0 | 0
Collateralized Mortgage-Backed Securities [Member] |  |  |
Securities available for sale |  | 150,151 | 161,477
Collateralized Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Securities available for sale |  | 0 | 0
Collateralized Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Securities available for sale |  | 150,151 | 161,477
Collateralized Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Securities available for sale |  | 0 | 0
Corporate Debt Securities [Member] |  |  |
Securities available for sale |  | 5,750 | 5,664
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Securities available for sale |  | 0 | 0
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Securities available for sale |  | 5,750 | 5,664
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Securities available for sale |  | 0 | 0
US Treasury Securities [Member] |  |  |
Securities available for sale |  | 963 | 936
US Treasury Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |
Securities available for sale |  |  | 0
US Treasury Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |
Securities available for sale |  | 963 | 936
US Treasury Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Securities available for sale |  |  | $ 0
[1] | Current reference prices were weighted by the relative amount of the loan

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