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Note 9 - Loans - Nonaccrual Loans and Related Allowance for Credit Losses (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Loans with no related allowance, unpaid principal balance | $ 89,455 | $ 74,673
Loans with no related allowance, recorded investment | 68,075 | 54,140
Loans with related allowance, unpaid principal balance |  | 16,539
Loans with related allowance, recorded investment |  | 14,714
Allowance | 4,221 | 3,941
Unpaid principal balance | 98,710 | 91,212
Non-accrual loans | 77,330 | 68,854
Commercial Portfolio Segment [Member] |  |
Loans with no related allowance, unpaid principal balance | 26,116 | 27,341
Loans with no related allowance, recorded investment | 14,661 | 12,949
Loans with related allowance, unpaid principal balance |  | 14,643
Loans with related allowance, recorded investment |  | 12,823
Allowance |  | 3,734
Commercial Real Estate Portfolio Segment [Member] |  |
Loans with no related allowance, unpaid principal balance | 42,020 | 37,697
Loans with no related allowance, recorded investment | 32,539 | 32,205
Loans with related allowance, unpaid principal balance |  | 1,896
Loans with related allowance, recorded investment |  | 1,891
Allowance |  | 207
Residential Mortgage and Equity Lines Portfolio Segment [Member] |  |
Loans with no related allowance, unpaid principal balance | 13,582 | 9,626
Loans with no related allowance, recorded investment | 13,138 | 8,978
Real Estate Construction Portfolio Segment [Member] |  |
Loans with no related allowance, unpaid principal balance | 7,737 |
Loans with no related allowance, recorded investment | 7,737 |
Loans with related allowance, unpaid principal balance | 9,255 |
Loans with related allowance, recorded investment | 9,255 |
Allowance | $ 4,221 |
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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