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Note 1 - Nature of Banking Activities and Significant Accounting Policies - Impact of Adoption of New ASU (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Jan. 01, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | ---
Held-to-Maturity, Allowance for Credit Loss | $ 107 |  | $ 0 |
Allowance for Credit Loss | 11,974 | $ 7,446 | 7,446 | $ 5,710
Allowance for credit losses for unfunded commitments |  | 0 |  |
Real Estate 1 [Member] | Construction and Land Development [Member] |  |  |  |
Allowance for Credit Loss | 312 | 546 | 546 | 345
Real Estate 1 [Member] | Secured by Multi-family Residential Properties [Member] |  |  |  |
Allowance for Credit Loss | 3,159 | 1,108 | 1,108 | 1,077
Real Estate 1 [Member] | Other Real Estate Loans [Member] |  |  |  |
Allowance for Credit Loss | 4,698 | 3,609 | 3,609 | 3,230
Commercial and Industrial Loans [Member] |  |  |  |
Allowance for Credit Loss | 3,706 | 1,874 | 1,874 | 718
Consumer and Other Loans [Member] |  |  |  |
Allowance for Credit Loss | 99 | 309 | 309 | $ 340
Accounting Standards Update 2016-13 [Member] |  |  |  |
Held-to-Maturity, Allowance for Credit Loss |  | 134 | 0 |
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member] |  |  |  |
Allowance for Credit Loss |  | 9,632 |  |
Allowance for credit losses for unfunded commitments |  | 153 |  |
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Real Estate 1 [Member] | Construction and Land Development [Member] |  |  |  |
Allowance for Credit Loss |  | 233 |  |
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Real Estate 1 [Member] | Secured by Multi-family Residential Properties [Member] |  |  |  |
Allowance for Credit Loss |  | 2,517 |  |
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Real Estate 1 [Member] | Other Real Estate Loans [Member] |  |  |  |
Allowance for Credit Loss |  | 5,311 |  |
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Commercial and Industrial Loans [Member] |  |  |  |
Allowance for Credit Loss |  | 1,487 |  |
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Consumer and Other Loans [Member] |  |  |  |
Allowance for Credit Loss |  | 84 |  |
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |
Held-to-Maturity, Allowance for Credit Loss |  | 134 | 134 |
Allowance for Credit Loss |  | 2,186 | 2,186 |
Allowance for credit losses for unfunded commitments |  | 153 |  |
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Real Estate 1 [Member] | Construction and Land Development [Member] |  |  |  |
Allowance for Credit Loss |  | (313) | (313) |
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Real Estate 1 [Member] | Secured by Multi-family Residential Properties [Member] |  |  |  |
Allowance for Credit Loss |  | 1,409 | 1,409 |
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Real Estate 1 [Member] | Other Real Estate Loans [Member] |  |  |  |
Allowance for Credit Loss |  | 1,702 | 1,702 |
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Commercial and Industrial Loans [Member] |  |  |  |
Allowance for Credit Loss |  | (387) | (387) |
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Consumer and Other Loans [Member] |  |  |  |
Allowance for Credit Loss |  | (225) | (225) |
Corporate Debt Securities [Member] |  |  |  |
Held-to-Maturity, Allowance for Credit Loss | $ 107 | 0 | 0 |
Corporate Debt Securities [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member] |  |  |  |
Held-to-Maturity, Allowance for Credit Loss |  | 134 |  |
Corporate Debt Securities [Member] | Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |
Held-to-Maturity, Allowance for Credit Loss |  | $ 134 | $ 134 |

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