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Note 3 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans - Impaired Loans and Associated Reserves (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018 | Jun. 30, 2018
--- | --- | --- | ---
Principal balance |  | $ 7,110 |  | $ 7,211 |  |
Total recorded investment |  | 6,651 | [1] | 6,820 | [1] | $ 12,042
Recorded investment for which there is no related allowance |  | 5,167 | [1] | 5,667 | [1] | 10,607
Recorded investment for which there is a related allowance |  | 1,484 | [1] | 1,153 | [1] | 1,435
Related allowance |  | 129 |  | 139 |  | $ 162
Consumer Real Estate Portfolio Segment [Member] | Closed End First Liens [Member] |  |  |  |  |  |
Principal balance | [2] | 889 |  | 728 |  |
Total recorded investment | [1],[2] | 870 |  | 719 |  |
Recorded investment for which there is no related allowance | [1],[2] | 870 |  | 719 |  |
Recorded investment for which there is a related allowance | [1],[2] |  |  |  |  |
Related allowance | [2] |  |  |  |  |
Consumer Real Estate Portfolio Segment [Member] | Closed End Junior Liens [Member] |  |  |  |  |  |
Principal balance | [2] | 132 |  | 144 |  |
Total recorded investment | [1],[2] | 132 |  | 143 |  |
Recorded investment for which there is no related allowance | [1],[2] | 0 |  | 0 |  |
Recorded investment for which there is a related allowance | [1],[2] | 132 |  | 143 |  |
Related allowance | [2] | 3 |  | 4 |  |
Consumer Real Estate Portfolio Segment [Member] | Investor Owned Residential Real Estate [Member] |  |  |  |  |  |
Principal balance | [2] | 580 |  | 593 |  |
Total recorded investment | [1],[2] | 571 |  | 590 |  |
Recorded investment for which there is no related allowance | [1],[2] | 571 |  | 590 |  |
Recorded investment for which there is a related allowance | [1],[2] | 0 |  |  |  |
Related allowance | [2] | 0 |  |  |  |
Commercial Real Estate Portfolio Segment [Member] | Multifamily Real Estate [Member] |  |  |  |  |  |
Principal balance | [2] | 471 |  | 485 |  |
Total recorded investment | [1],[2] | 461 |  | 483 |  |
Recorded investment for which there is no related allowance | [1],[2] | 461 |  | 483 |  |
Recorded investment for which there is a related allowance | [1],[2] |  |  | 0 |  |
Related allowance | [2] | 0 |  | 0 |  |
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member] |  |  |  |  |  |
Principal balance | [2] | 1,196 |  | 1,363 |  |
Total recorded investment | [1],[2] | 1,179 |  | 1,363 |  |
Recorded investment for which there is no related allowance | [1],[2] | 790 |  | 1,363 |  |
Recorded investment for which there is a related allowance | [1],[2] | 389 |  |  |  |
Related allowance | [2] | 2 |  |  |  |
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Other [Member] |  |  |  |  |  |
Principal balance | [2] | 2,867 |  | 2,867 |  |
Total recorded investment | [1],[2] | 2,467 |  | 2,494 |  |
Recorded investment for which there is no related allowance | [1],[2] | 2,467 |  | 2,494 |  |
Recorded investment for which there is a related allowance | [1],[2] | 0 |  | 0 |  |
Related allowance | [2] | 0 |  | 0 |  |
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member] |  |  |  |  |  |
Principal balance | [2] | 968 |  | 1,018 |  |
Total recorded investment | [1],[2] | 964 |  | 1,015 |  |
Recorded investment for which there is no related allowance | [1],[2] | 1 |  | 5 |  |
Recorded investment for which there is a related allowance | [1],[2] | 963 |  | 1,010 |  |
Related allowance | [2] | 124 |  | 135 |  |
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member] |  |  |  |  |  |
Principal balance | [2] | 7 |  | 13 |  |
Total recorded investment | [1],[2] | 7 |  | 13 |  |
Recorded investment for which there is no related allowance | [1],[2] | 7 |  | 13 |  |
Recorded investment for which there is a related allowance | [1],[2] |  |  |  |  |
Related allowance | [2] | $ 0 |  |  |  |
[1] | Recorded investment is net of charge-offs and interest paid while a loan is in nonaccrual status.
[2] | Only classes with impaired loans are shown.

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