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Note 4 - Loans Receivable and Allowance for Loan and Lease Losses - Impaired Loans (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Impaired loans, related allowance | $ 1,700,000 |  | $ 1,500,000
Impaired loans, recorded investment | 18,000,000 |  | 19,600,000
With no allowance recorded, average recorded investment | 9,978,000 | $ 17,798,000 |
With no allowance recorded, interest income recognized | 29,000 | 175,000 |
With allowance recorded, average recorded investment | 8,887,000 | 6,445,000 |
With allowance recorded, interest income recognized | 4,000 |  |
Impaired Loans, Average recorded investment | 18,865,000 | 24,243,000 |
Impaired Loans, interest income recognized | 33,000 | 175,000 |
Business Activities Loans [Member] |  |  |
Impaired loans with no related allowance recorded, recorded investment | 8,898,000 |  | 10,828,000
Impaired loans with no related allowance recorded, unpaid principal balance | 8,965,000 |  | 10,992,000
Impaired loans with a related allowance recorded, recorded investment | 9,127,000 |  | 8,800,000
Impaired loans with a related allowance recorded, unpaid principal balance | 9,229,000 |  | 8,800,000
Impaired loans, related allowance | 1,716,000 |  | 1,496,000
Impaired loans, recorded investment | 18,025,000 |  | 19,628,000
Impaired loans, unpaid principal balance | 18,194,000 |  | 19,792,000
Commercial Real Estate Portfolio Segment [Member] |  |  |
With no allowance recorded, average recorded investment | 3,467,000 | 6,440,000 |
With no allowance recorded, interest income recognized |  | 13,000 |
With allowance recorded, average recorded investment | 8,808,000 | 472,000 |
With allowance recorded, interest income recognized | 1,000 |  |
Impaired Loans, Average recorded investment | 12,275,000 | 6,912,000 |
Impaired Loans, interest income recognized | 1,000 | 13,000 |
Commercial Real Estate Portfolio Segment [Member] | Business Activities Loans [Member] |  |  |
Impaired loans with no related allowance recorded, recorded investment | 2,707,000 |  | 4,234,000
Impaired loans with no related allowance recorded, unpaid principal balance | 2,713,000 |  | 4,309,000
Impaired loans with a related allowance recorded, recorded investment | 8,811,000 |  | 8,800,000
Impaired loans with a related allowance recorded, unpaid principal balance | 8,811,000 |  | 8,800,000
Impaired loans, related allowance | 1,703,000 |  | 1,496,000
Impaired loans, recorded investment | 11,518,000 |  | 13,034,000
Impaired loans, unpaid principal balance | 11,524,000 |  | 13,109,000
Residential Portfolio Segment [Member] |  |  |
With no allowance recorded, average recorded investment | 3,578,000 | 942,000 |
With no allowance recorded, interest income recognized | 20,000 | 4,000 |
With allowance recorded, average recorded investment | 28,000 | 2,089,000 |
With allowance recorded, interest income recognized | 2,000 |  |
Impaired Loans, Average recorded investment | 3,606,000 | 3,031,000 |
Impaired Loans, interest income recognized | 22,000 | 4,000 |
Residential Portfolio Segment [Member] | Business Activities Loans [Member] |  |  |
Impaired loans with no related allowance recorded, recorded investment | 3,479,000 |  | 3,621,000
Impaired loans with no related allowance recorded, unpaid principal balance | 3,498,000 |  | 3,623,000
Impaired loans with a related allowance recorded, recorded investment | 110,000 |  |
Impaired loans with a related allowance recorded, unpaid principal balance | 110,000 |  |
Impaired loans, related allowance | 4,000 |  |
Impaired loans, recorded investment | 3,589,000 |  | 3,621,000
Impaired loans, unpaid principal balance | 3,608,000 |  | 3,623,000
Commercial Portfolio Segment [Member] |  |  |
With no allowance recorded, average recorded investment | 2,082,000 | 775,000 |
With no allowance recorded, interest income recognized | 1,000 |  |
With allowance recorded, average recorded investment |  | 3,863,000 |
With allowance recorded, interest income recognized |  |  |
Impaired Loans, Average recorded investment | 2,082,000 | 4,638,000 |
Impaired Loans, interest income recognized | 1,000 |  |
Commercial Portfolio Segment [Member] | Business Activities Loans [Member] |  |  |
Impaired loans with no related allowance recorded, recorded investment | 2,048,000 |  | 2,057,000
Impaired loans with no related allowance recorded, unpaid principal balance | 2,054,000 |  | 2,060,000
Impaired loans, related allowance |  |  |
Impaired loans, recorded investment | 2,048,000 |  | 2,057,000
Impaired loans, unpaid principal balance | 2,054,000 |  | 2,060,000
Consumer Portfolio Segment [Member] |  |  |
With no allowance recorded, average recorded investment | 851,000 | 841,000 |
With no allowance recorded, interest income recognized | 8,000 | 8,000 |
With allowance recorded, average recorded investment | 51,000 | 21,000 |
With allowance recorded, interest income recognized | 1,000 |  |
Impaired Loans, Average recorded investment | 902,000 | 862,000 |
Impaired Loans, interest income recognized | 9,000 | 8,000 |
Consumer Portfolio Segment [Member] | Business Activities Loans [Member] |  |  |
Impaired loans with no related allowance recorded, recorded investment | 664,000 |  | 916,000
Impaired loans with no related allowance recorded, unpaid principal balance | 700,000 |  | 1,000,000
Impaired loans with a related allowance recorded, recorded investment | 206,000 |  |
Impaired loans with a related allowance recorded, unpaid principal balance | 308,000 |  |
Impaired loans, related allowance | 9,000 |  |
Impaired loans, recorded investment | 870,000 |  | 916,000
Impaired loans, unpaid principal balance | 1,008,000 |  | $ 1,000,000
Construction Portfolio Segment [Member] |  |  |
With no allowance recorded, average recorded investment |  | 8,800,000 |
With no allowance recorded, interest income recognized |  | 150,000 |
Impaired Loans, Average recorded investment |  | 8,800,000 |
Impaired Loans, interest income recognized |  | $ 150,000 |

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