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Note 5 - Loans - Troubled Debt Restructuring (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
No. of Contracts | 15 | 5 | 5
Pre-Modification Outstanding Recorded Investment | $ 11,980 | $ 2,153 | $ 5,417
Post-Modification Outstanding Recorded Investment | 11,946 | 2,153 | 5,417
Specific Reserve | 427 | 0 | 0
Charge-offs | $ 0 | $ 0 | $ 0
Commercial Portfolio Segment [Member] |  |  |
No. of Contracts | 4 | 3 | 5
Pre-Modification Outstanding Recorded Investment | $ 6,115 | $ 2,150 | $ 5,417
Post-Modification Outstanding Recorded Investment | 6,115 | 2,150 | 5,417
Specific Reserve | 427 | 0 | 0
Charge-offs | $ 0 | $ 0 | $ 0
Commercial Mortgage Loans [Member] |  |  |
No. of Contracts | 3 |  |
Pre-Modification Outstanding Recorded Investment | $ 3,676 |  |
Post-Modification Outstanding Recorded Investment | 3,669 |  |
Specific Reserve | 0 |  |
Charge-offs | $ 0 |  |
Residential Mortgage and Equity Lines Portfolio Segment [Member] |  |  |
No. of Contracts | 8 | 2 |
Pre-Modification Outstanding Recorded Investment | $ 2,189 | $ 3 |
Post-Modification Outstanding Recorded Investment | 2,162 | 3 |
Specific Reserve | 0 | 0 |
Charge-offs | $ 0 | $ 0 |

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- Definition Reflects the amount of the specific reserve related to a troubled debt restructuring. + References No definition available. + Details
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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 -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524 + Details
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- Definition Amount, after troubled debt restructuring, of modified financing receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=121585226&loc=d3e18845-111554 + Details
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