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Note 4 - Credit Quality - Loans Modified as Trouble Debt Restructurings (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 USD ($) | Sep. 30, 2016 USD ($) | Sep. 30, 2017 USD ($) | Sep. 30, 2016 USD ($)
Total contracts | 1 |  | 3 | 1
Pre-modification recorded investment | $ 42 |  | $ 141 | $ 115
Post-modification recorded investment | $ 42 |  | $ 141 | $ 115
Below Market Interest Rate [Member] | Single Family Owner Occupied [Member] |  |  |  |
Total contracts | 1 |  | 3 | 1
Pre-modification recorded investment | $ 42 |  | $ 141 | $ 115
Post-modification recorded investment | $ 42 |  | $ 141 | $ 115

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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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://www.xbrl.org/2003/role/presentationRef -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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