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Note 4 - Loans Receivable and Allowance for Loan and Lease Losses - Impaired Loans (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Impaired loans, related allowance | $ 1,600,000 |  | $ 1,600,000 |  | $ 1,500,000
Impaired loans, recorded investment | 23,200,000 |  | 23,200,000 |  | 19,600,000
With no allowance recorded, average recorded investment | 12,958,000 | $ 22,105,000 | 11,835,000 | $ 19,224,000 |
With no allowance recorded, interest income recognized | 37,000 | 212,000 | 78,000 | 545,000 |
With allowance recorded, average recorded investment | 9,009,000 | 4,216,000 | 8,923,000 | 5,376,000 |
With allowance recorded, interest income recognized | 36,000 |  | 40,000 |  |
Impaired Loans, Average recorded investment | 21,967,000 | 26,321,000 | 20,758,000 | 24,600,000 |
Impaired Loans, interest income recognized | 73,000 | 212,000 | 118,000 | 545,000 |
Business Activities Loans [Member] |  |  |  |  |
Impaired loans with no related allowance recorded, recorded investment | 13,913,000 |  | 13,913,000 |  | 10,828,000
Impaired loans with no related allowance recorded, unpaid principal balance | 14,099,000 |  | 14,099,000 |  | 10,992,000
Impaired loans with a related allowance recorded, recorded investment | 9,288,000 |  | 9,288,000 |  | 8,800,000
Impaired loans with a related allowance recorded, unpaid principal balance | 9,289,000 |  | 9,289,000 |  | 8,800,000
Impaired loans, related allowance | 1,627,000 |  | 1,627,000 |  | 1,496,000
Impaired loans, recorded investment | 23,201,000 |  | 23,201,000 |  | 19,628,000
Impaired loans, unpaid principal balance | 23,388,000 |  | 23,388,000 |  | 19,792,000
Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |
With no allowance recorded, average recorded investment | 6,256,000 | 10,490,000 | 5,170,000 | 7,956,000 |
With no allowance recorded, interest income recognized | 13,000 | 120,000 | 26,000 | 186,000 |
With allowance recorded, average recorded investment | 8,866,000 | 215,000 | 8,841,000 | 393,000 |
With allowance recorded, interest income recognized | 34,000 |  | 35,000 |  |
Impaired Loans, Average recorded investment | 15,122,000 | 10,705,000 | 14,011,000 | 8,349,000 |
Impaired Loans, interest income recognized | 47,000 | 120,000 | 61,000 | 186,000 |
Commercial Real Estate Portfolio Segment [Member] | Business Activities Loans [Member] |  |  |  |  |
Impaired loans with no related allowance recorded, recorded investment | 7,063,000 |  | 7,063,000 |  | 4,234,000
Impaired loans with no related allowance recorded, unpaid principal balance | 7,069,000 |  | 7,069,000 |  | 4,309,000
Impaired loans with a related allowance recorded, recorded investment | 9,030,000 |  | 9,030,000 |  | 8,800,000
Impaired loans with a related allowance recorded, unpaid principal balance | 9,030,000 |  | 9,030,000 |  | 8,800,000
Impaired loans, related allowance | 1,615,000 |  | 1,615,000 |  | 1,496,000
Impaired loans, recorded investment | 16,093,000 |  | 16,093,000 |  | 13,034,000
Impaired loans, unpaid principal balance | 16,099,000 |  | 16,099,000 |  | 13,109,000
Residential Portfolio Segment [Member] |  |  |  |  |
With no allowance recorded, average recorded investment | 3,565,000 | 2,271,000 | 3,585,000 | 1,584,000 |
With no allowance recorded, interest income recognized | 13,000 | 41,000 | 33,000 | 98,000 |
With allowance recorded, average recorded investment | 55,000 | 1,505,000 | 31,000 | 1,767,000 |
With allowance recorded, interest income recognized | 1,000 |  | 3,000 |  |
Impaired Loans, Average recorded investment | 3,620,000 | 3,776,000 | 3,616,000 | 3,351,000 |
Impaired Loans, interest income recognized | 14,000 | 41,000 | 36,000 | 98,000 |
Residential Portfolio Segment [Member] | Business Activities Loans [Member] |  |  |  |  |
Impaired loans with no related allowance recorded, recorded investment | 3,624,000 |  | 3,624,000 |  | 3,621,000
Impaired loans with no related allowance recorded, unpaid principal balance | 3,664,000 |  | 3,664,000 |  | 3,623,000
Impaired loans with a related allowance recorded, recorded investment | 109,000 |  | 109,000 |  |
Impaired loans with a related allowance recorded, unpaid principal balance | 110,000 |  | 110,000 |  |
Impaired loans, related allowance | 4,000 |  | 4,000 |  |
Impaired loans, recorded investment | 3,733,000 |  | 3,733,000 |  | 3,621,000
Impaired loans, unpaid principal balance | 3,774,000 |  | 3,774,000 |  | 3,623,000
Commercial Portfolio Segment [Member] |  |  |  |  |
With no allowance recorded, average recorded investment | 1,985,000 | 1,854,000 | 2,031,000 | 1,275,000 |
With no allowance recorded, interest income recognized | 2,000 | 38,000 | 2,000 | 87,000 |
With allowance recorded, average recorded investment |  | 2,459,000 |  | 3,183,000 |
With allowance recorded, interest income recognized |  |  |  |  |
Impaired Loans, Average recorded investment | 1,985,000 | 4,313,000 | 2,031,000 | 4,458,000 |
Impaired Loans, interest income recognized | 2,000 | 38,000 | 2,000 | 87,000 |
Commercial Portfolio Segment [Member] | Business Activities Loans [Member] |  |  |  |  |
Impaired loans with no related allowance recorded, recorded investment | 1,724,000 |  | 1,724,000 |  | 2,057,000
Impaired loans with no related allowance recorded, unpaid principal balance | 1,724,000 |  | 1,724,000 |  | 2,060,000
Impaired loans, related allowance |  |  |  |  |
Impaired loans, recorded investment | 1,724,000 |  | 1,724,000 |  | 2,057,000
Impaired loans, unpaid principal balance | 1,724,000 |  | 1,724,000 |  | 2,060,000
Consumer Portfolio Segment [Member] |  |  |  |  |
With no allowance recorded, average recorded investment | 1,152,000 | 890,000 | 1,049,000 | 866,000 |
With no allowance recorded, interest income recognized | 9,000 | 13,000 | 17,000 | 24,000 |
With allowance recorded, average recorded investment | 88,000 | 37,000 | 51,000 | 33,000 |
With allowance recorded, interest income recognized | 1,000 |  | 2,000 |  |
Impaired Loans, Average recorded investment | 1,240,000 | 927,000 | 1,100,000 | 899,000 |
Impaired Loans, interest income recognized | 10,000 | 13,000 | 19,000 | 24,000 |
Consumer Portfolio Segment [Member] | Business Activities Loans [Member] |  |  |  |  |
Impaired loans with no related allowance recorded, recorded investment | 1,502,000 |  | 1,502,000 |  | 916,000
Impaired loans with no related allowance recorded, unpaid principal balance | 1,642,000 |  | 1,642,000 |  | 1,000,000
Impaired loans with a related allowance recorded, recorded investment | 149,000 |  | 149,000 |  |
Impaired loans with a related allowance recorded, unpaid principal balance | 149,000 |  | 149,000 |  |
Impaired loans, related allowance | 8,000 |  | 8,000 |  |
Impaired loans, recorded investment | 1,651,000 |  | 1,651,000 |  | 916,000
Impaired loans, unpaid principal balance | 1,791,000 |  | 1,791,000 |  | $ 1,000,000
Construction Portfolio Segment [Member] |  |  |  |  |
With no allowance recorded, average recorded investment |  | 6,600,000 |  | 7,543,000 |
With no allowance recorded, interest income recognized |  |  |  | 150,000 |
Impaired Loans, Average recorded investment |  | 6,600,000 |  | 7,543,000 |
Impaired Loans, interest income recognized |  |  |  | $ 150,000 |

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