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Note 6 - Loans and the Allowance for Credit Losses - Aging of Modified Loans (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Modified | $ 70,295,000 | $ 211,000 | $ 82,988,000 | $ 255,000
Financial Asset, Not Past Due [Member] |  |  |  |
Modified |  |  | 100,786 |
Financial Asset, 30 to 89 Days Past Due [Member] |  |  |  |
Modified |  |  | 0 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |  |  |
Modified |  |  | 0 |
Commercial Portfolio Segment [Member] |  |  |  |
Modified | 6,491,000 | 0 | 17,767,000 | 44,000
Commercial Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] |  |  |  |
Modified |  |  | 28,084,000 |
Commercial Portfolio Segment [Member] | Financial Asset, 30 to 89 Days Past Due [Member] |  |  |  |
Modified |  |  | 0 |
Commercial Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |  |  |
Modified |  |  | 0 |
Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Modified | $ 63,804,000 | $ 211,000 | 63,804,000 | $ 211,000
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] |  |  |  |
Modified |  |  | 71,285,000 |
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 30 to 89 Days Past Due [Member] |  |  |  |
Modified |  |  | 0 |
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |  |  |
Modified |  |  | 0 |
Residential Portfolio Segment [Member] |  |  |  |
Modified |  |  | 1,417,000 |
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] |  |  |  |
Modified |  |  | 1,417,000 |
Residential Portfolio Segment [Member] | Financial Asset, 30 to 89 Days Past Due [Member] |  |  |  |
Modified |  |  | 0 |
Residential Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |  |  |
Modified |  |  | $ 0 |

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