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Note 5 - Loans and Allowance for Loan Losses - Loans Individually Evaluated for Impairment (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015 | Dec. 31, 2015
Residential Portfolio Segment [Member] |  |  |  |  |
Unpaid principal balance with no allowance | $ 724,000 |  | $ 724,000 |  | $ 1,001,000
Recorded investment with no allowance | 724,000 |  | 724,000 |  | 1,001,000
Average impaired loans with allowance |  | $ 1,005 |  | $ 761 |
Interest income recognized with allowance |  | 11 |  | 36 |
Cash basis interest recognized with allowance |  | 11 |  | 36 |
Average impaired loans with no allowance | 725,000 | 895,000 | 728,000 | 895,000 |
Interest income recognized with no allowance | 4,000 |  | 20,000 |  |
Cash basis interest recognized with no allowance | 4 |  | 20 |  |
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Owner Occupied [Member] |  |  |  |  |
Unpaid principal balance with allowance | 5,918,000 |  | 5,918,000 |  | 204,000
Recorded investment with allowance | 5,918,000 |  | 5,918,000 |  | 204,000
Allowance for loan losses allocated | 2,603,000 |  | 2,603,000 |  | 204,000
Unpaid principal balance with no allowance | 3,291,000 |  | 3,291,000 |  | 3,812,000
Recorded investment with no allowance | 2,744,000 |  | 2,744,000 |  | 3,265,000
Average impaired loans with allowance | 5,427,000 | 204,000 | 2,815,000 | 204,000 |
Interest income recognized with allowance | 94,000 | 11,000 | 241,000 | 11,000 |
Cash basis interest recognized with allowance | 94,000 | 11,000 | 241,000 | 11,000 |
Average impaired loans with no allowance | 2,797,000 | 2,873,000 | 2,879,000 | 2,617,000 |
Interest income recognized with no allowance | 37,000 | 74,000 | 120,000 | 135,000 |
Cash basis interest recognized with no allowance | 37,000 | 74,000 | 120,000 | 135,000 |
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Nonowner Occupied [Member] |  |  |  |  |
Unpaid principal balance with allowance | 387,000 |  | 387,000 |  | 396,000
Recorded investment with allowance | 387,000 |  | 387,000 |  | 396,000
Allowance for loan losses allocated | 102,000 |  | 102,000 |  | 107,000
Unpaid principal balance with no allowance | 5,614,000 |  | 5,614,000 |  | 5,178,000
Recorded investment with no allowance | 3,798,000 |  | 3,798,000 |  | 2,773,000
Average impaired loans with allowance | 389,000 | 401,000 | 392,000 | 404,000 |
Interest income recognized with allowance | 5,000 | 5,000 | 15,000 | 70,000 |
Cash basis interest recognized with allowance | 5,000 | 5,000 | 15,000 | 70,000 |
Average impaired loans with no allowance | 3,680,000 | 2,910,000 | 3,557,000 | 3,605,000 |
Interest income recognized with no allowance | 33,000 | 12,000 | 75,000 | 37,000 |
Cash basis interest recognized with no allowance | 33,000 | 12,000 | 75,000 | 37,000 |
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] |  |  |  |  |
Unpaid principal balance with no allowance | 641,000 |  | 641,000 |  | 680,000
Recorded investment with no allowance | 544,000 |  | 544,000 |  | 680,000
Average impaired loans with no allowance | 363,000 | 680,000 | 521,000 | 510,000 |
Interest income recognized with no allowance | 11,000 |  | 108,000 |  |
Cash basis interest recognized with no allowance | 11,000 |  | 108,000 |  |
Commercial and Industrial Portfolio Segment [Member] |  |  |  |  |
Unpaid principal balance with allowance | 391,000 |  | 391,000 |  | 4,355,000
Recorded investment with allowance | 391,000 |  | 391,000 |  | 4,355,000
Allowance for loan losses allocated | 245,000 |  | 245,000 |  | 1,850,000
Unpaid principal balance with no allowance | 8,708,000 |  | 8,708,000 |  | 4,336,000
Recorded investment with no allowance | 8,708,000 |  | 8,708,000 |  | 4,336,000
Average impaired loans with allowance | 391,000 | 3,589,000 | 391,000 | 3,343,000 |
Interest income recognized with allowance |  | 52,000 |  | 117,000 |
Cash basis interest recognized with allowance |  | 52,000 |  | 117,000 |
Average impaired loans with no allowance | 8,575,000 | 3,800,000 | 8,234,000 | 3,897,000 |
Interest income recognized with no allowance | 103,000 | 26,000 | 290,000 | 133,000 |
Cash basis interest recognized with no allowance | 103,000 | 26,000 | 290,000 | 133,000 |
Consumer Portfolio Segment [Member] | Home Equity Loan [Member] |  |  |  |  |
Unpaid principal balance with allowance | 216,000 |  | 216,000 |  | 218,000
Recorded investment with allowance | 216,000 |  | 216,000 |  | 218,000
Allowance for loan losses allocated | 2,000 |  | 2,000 |  | 3,000
Average impaired loans with allowance | 217,000 | 218,000 | 218,000 | 219,000 |
Interest income recognized with allowance | 1,000 | 2,000 | 5,000 | 6,000 |
Cash basis interest recognized with allowance | 1,000 | 2,000 | 5,000 | 6,000 |
Allowance for loan losses allocated | 2,952,000 |  | 2,952,000 |  | 2,164,000
Unpaid principal balance | 25,890,000 |  | 25,890,000 |  | 20,180,000
Recorded investment | 23,430,000 |  | 23,430,000 |  | $ 17,228,000
Average impaired loans | 22,564,000 | 16,575,000 | 19,735,000 | 16,455,000 |
Interest income recognized | 288,000 | 193,000 | 874,000 | 545,000 |
Cash basis interest recognized | $ 288,000 | $ 193,000 | $ 874,000 | $ 545,000 |

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