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Note 9 - Loans - Impaired Loans and Related Allowance for Credit Losses (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Loans with no related allowance, unpaid principal balance | $ 46,853 | $ 46,336
Loans with no related allowance, recorded investment | 38,513 | 38,401
Loans with related allowance, unpaid principal balance | 59,183 | 38,272
Loans with related allowance, recorded investment | 47,820 | 27,445
Allowance | 8,340 | 4,547
Unpaid principal balance | 106,036 | 84,608
Recorded investment | 86,333 | 65,846
Commercial Portfolio Segment [Member] |  |
Loans with no related allowance, unpaid principal balance | 15,898 | 15,879
Loans with no related allowance, recorded investment | 11,304 | 11,342
Loans with related allowance, unpaid principal balance | 34,167 | 14,294
Loans with related allowance, recorded investment | 24,978 | 5,217
Allowance | 5,293 | 894
Commercial Real Estate Portfolio Segment [Member] |  |
Loans with no related allowance, unpaid principal balance | 24,988 | 24,437
Loans with no related allowance, recorded investment | 21,459 | 21,209
Loans with related allowance, unpaid principal balance | 17,760 | 17,930
Loans with related allowance, recorded investment | 16,636 | 16,964
Allowance | 3,017 | 3,631
Residential Mortgage and Equity Lines Portfolio Segment [Member] |  |
Loans with no related allowance, unpaid principal balance | 5,967 | 6,020
Loans with no related allowance, recorded investment | 5,750 | 5,850
Loans with related allowance, unpaid principal balance | 7,256 | 6,048
Loans with related allowance, recorded investment | 6,206 | 5,264
Allowance | $ 30 | $ 22

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