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Note 5 - Loans - Troubled Debt Restructuring (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
No. of Contracts |  | 15 | 5
Pre-modification |  | $ 11,980 | $ 2,153
Post-modification | $ 2,872 | 11,946 | 2,153
Specific Reserve |  | 427 | 0
Charge-offs |  | $ 0 | $ 0
Commercial Portfolio Segment [Member] |  |  |
No. of Contracts |  | 4 | 3
Pre-modification |  | $ 6,115 | $ 2,150
Post-modification | $ 2,650 | 6,115 | 2,150
Specific Reserve |  | 427 | 0
Charge-offs |  | $ 0 | $ 0
Commercial Real Estate Portfolio Segment [Member] |  |  |
No. of Contracts |  | 3 |
Pre-modification |  | $ 3,676 |
Post-modification |  | 3,669 |
Specific Reserve |  | $ 0 |
Residential Mortgage and Equity Lines Portfolio Segment [Member] |  |  |
No. of Contracts |  | 8 | 2
Pre-modification |  | $ 2,189 | $ 3
Post-modification |  | 2,162 | 3
Specific Reserve |  | $ 0 | 0
Charge-offs |  |  | $ 0

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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 33 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-33 + Details
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- Definition Amortized cost of financing receivable modified during period for debtor experiencing financial difficulty. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-42 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 12A -Publisher FASB -URI https://asc.fasb.org//1943274/2147481933/310-10-55-12A Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 33 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-33 + Details
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- Definition Amount, before troubled debt restructuring, of financing receivable to be modified. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 33 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-33 + Details
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- Definition Reflects the amount of the write-down related to a troubled debt restructuring. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 310 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481746/310-40-50-4 + Details
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