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Note 5 - Loans - Impaired Loans and Related Allowance for Credit Losses (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Loans with no related allowance, unpaid principal balance | $ 74,673 | $ 46,336
Loans with no related allowance, recorded investment | 54,140 | 38,401
Loans with related allowance, unpaid principal balance | 16,539 | 38,272
Loans with related allowance, recorded investment | 14,714 | 27,445
Allowance | 3,941 | 4,547
Unpaid principal balance | 91,212 | 84,608
Recorded investment | 68,854 | 65,846
Commercial Portfolio Segment [Member] |  |
Loans with no related allowance, unpaid principal balance | 27,341 | 15,879
Loans with no related allowance, recorded investment | 12,949 | 11,342
Loans with related allowance, unpaid principal balance | 14,643 | 14,294
Loans with related allowance, recorded investment | 12,823 | 5,217
Allowance | 3,734 | 894
Commercial Real Estate Portfolio Segment [Member] |  |
Loans with no related allowance, unpaid principal balance | 37,697 | 24,437
Loans with no related allowance, recorded investment | 32,205 | 21,209
Loans with related allowance, unpaid principal balance | 1,896 | 17,930
Loans with related allowance, recorded investment | 1,891 | 16,964
Allowance | 207 | 3,631
Residential Mortgage and Equity Lines Portfolio Segment [Member] |  |
Loans with no related allowance, unpaid principal balance | 9,626 | 6,020
Loans with no related allowance, recorded investment | 8,978 | 5,850
Loans with related allowance, unpaid principal balance | 0 | 6,048
Loans with related allowance, recorded investment | 0 | 5,264
Allowance | 0 | $ 22
Installment and Other Loans [Member ] |  |
Loans with no related allowance, unpaid principal balance | 9 |
Loans with no related allowance, recorded investment | $ 8 |

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- Definition Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953550-111524 + Details
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