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Note 4 - Loans and Allowance for Loan Losses - Loans Individually Evaluated for Impairment (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2017
Allowance for Loan Losses Allocated | $ 92 |  | $ 94
Unpaid principal balance | 18,050 |  | 19,917
Recorded investment | 16,227 |  | 18,108
Average impaired loans | 16,606 | $ 18,091 |
Interest income recognized | 204 | 180 |
Cash basis interest recognized | 204 | 180 |
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Nonowner Occupied [Member] |  |  |
Unpaid principal balance - with allowance recorded | 371 |  | 372
Recorded investment - with allowance recorded | 371 |  | 372
Allowance for Loan Losses Allocated | 92 |  | 94
Unpaid principal balance - with no allowance recorded | 4,966 |  | 4,989
Recorded investment - with no allowance recorded | 3,507 |  | 3,534
Average impaired loans - with allowance recorded | 371 | 382 |
Interest income recognized - with allowance recorded | 1 | 5 |
Cash basis interest recognized - with allowance recorded | 1 | 5 |
Average impaired loans - with no allowance recorded | 3,521 | 3,822 |
Interest income recognized - with no allowance recorded | 20 | 21 |
Cash basis interest recognized - with no allowance recorded | 20 | 21 |
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] |  |  |
Unpaid principal balance - with no allowance recorded | 348 |  | 352
Recorded investment - with no allowance recorded |  |  |
Average impaired loans - with allowance recorded |  | 345 |
Interest income recognized - with allowance recorded |  |  |
Cash basis interest recognized - with allowance recorded |  |  |
Average impaired loans - with no allowance recorded |  | 182 |
Interest income recognized - with no allowance recorded | 5 | 4 |
Cash basis interest recognized - with no allowance recorded | 5 | 4 |
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Owner Occupied [Member] |  |  |
Unpaid principal balance - with no allowance recorded | 2,478 |  | 3,427
Recorded investment - with no allowance recorded | 2,478 |  | 3,427
Average impaired loans - with no allowance recorded | 2,491 | 3,547 |
Interest income recognized - with no allowance recorded | 34 | 36 |
Cash basis interest recognized - with no allowance recorded | 34 | 36 |
Residential Portfolio Segment [Member] |  |  |
Unpaid principal balance - with no allowance recorded | 1,695 |  | 1,420
Recorded investment - with no allowance recorded | 1,679 |  | 1,420
Average impaired loans - with no allowance recorded | 1,550 | 918 |
Interest income recognized - with no allowance recorded | 20 | 12 |
Cash basis interest recognized - with no allowance recorded | 20 | 12 |
Commercial and Industrial Portfolio Segment [Member] |  |  |
Unpaid principal balance - with no allowance recorded | 8,192 |  | 9,154
Recorded investment - with no allowance recorded | 8,192 |  | 9,154
Average impaired loans - with allowance recorded |  | 392 |
Interest income recognized - with allowance recorded |  |  |
Cash basis interest recognized - with allowance recorded |  |  |
Average impaired loans - with no allowance recorded | 8,673 | 8,292 |
Interest income recognized - with no allowance recorded | 124 | 100 |
Cash basis interest recognized - with no allowance recorded | $ 124 | 100 |
Consumer Portfolio Segment [Member] | Home Equity Loan [Member] |  |  |
Unpaid principal balance - with allowance recorded |  |  | 203
Recorded investment - with allowance recorded |  |  | $ 201
Average impaired loans - with allowance recorded |  | 211 |
Interest income recognized - with allowance recorded |  | 2 |
Cash basis interest recognized - with allowance recorded |  | $ 2 |

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