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Note 5 - Credit Quality - Loans Modified as Troubled Debt Restructurings (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Total contracts |  | 2 | 6
Pre-modification recorded investment |  | $ 52 | $ 243
Post-modification recorded investment | [1] | $ 52 | $ 243
Total contracts, payment default |  | 1 | 1
Recorded investment, payment default |  | $ 521 | $ 14
Single Family Owner Occupied [Member] |  |  |
Total contracts, payment default |  | 1 | 1
Recorded investment, payment default |  | $ 521 | $ 14
Below Market Interest Rate [Member] | Single Family Owner Occupied [Member] |  |  |
Total contracts |  | 1 |
Pre-modification recorded investment |  | $ 11 |
Post-modification recorded investment | [1] | $ 11 |
Below Market Interest Rate and Extended Payment Term [Member] | Single Family Owner Occupied [Member] |  |  |
Total contracts |  | 1 | 5
Pre-modification recorded investment |  | $ 41 | $ 207
Post-modification recorded investment | [1] | $ 41 | $ 207
Below Market Interest Rate and Extended Payment Term [Member] | Consumer Loans [Member] |  |  |
Total contracts |  |  | 1
Pre-modification recorded investment |  |  | $ 36
Post-modification recorded investment |  |  | $ 36
[1] | Represents the loan balance immediately following modification

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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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- Definition Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953682-111524 + Details
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- Definition Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953682-111524 + Details
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