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Note 4 - Credit Quality - Loans Modified as Troubled Debt Restructurings (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 USD ($) | Sep. 30, 2017 USD ($) | Sep. 30, 2018 USD ($) | Sep. 30, 2017 USD ($)
Total contracts |  | 1 | 1 | 2 | 3
Pre-modification recorded investment |  | $ 11 | $ 42 | $ 52 | $ 141
Post-modification recorded investment | [1] | $ 11 | $ 42 | $ 52 | $ 141
Below Market Interest Rate [Member] | Single Family Owner Occupied [Member] |  |  |  |  |
Total contracts |  | 1 |  | 1 |
Pre-modification recorded investment |  | $ 11 |  | $ 11 |
Post-modification recorded investment | [1] | $ 11 |  | $ 11 |
Below Market Interest Rate and Extended Payment Term [Member] | Single Family Owner Occupied [Member] |  |  |  |  |
Total contracts |  |  | 1 | 1 | 3
Pre-modification recorded investment |  |  | $ 42 | $ 41 | $ 141
Post-modification recorded investment | [1] |  | $ 42 | $ 41 | $ 141
[1] | Represents the loan balance immediately following modification

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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524 + Details
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- Definition Post-modification amount of investment in financing receivables modified by troubled debt restructurings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524 + Details
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