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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, 2019 USD ($) | Dec. 31, 2018 USD ($)
Total contracts | 10 | 2
Pre-modification recorded investment | $ 1,223 | $ 52
Post-modification recorded investment | $ 1,152 | $ 52
Total contracts, payment default |  | 1
Recorded investment, payment default |  | $ 521
Single Family Owner Occupied [Member] |  |
Total contracts, payment default |  | 1
Recorded investment, payment default |  | $ 521
Below Market Interest Rate [Member] | Single Family Owner Occupied [Member] |  |
Total contracts |  | 1
Pre-modification recorded investment |  | $ 11
Post-modification recorded investment |  | $ 11
Below Market Interest Rate and Extended Payment Term [Member] | Single Family Owner Occupied [Member] |  |
Total contracts | 6 | 1
Pre-modification recorded investment | $ 887 | $ 41
Post-modification recorded investment | $ 871 | $ 41
Payment Deferral [Member] |  |
Total contracts | 4 |
Pre-modification recorded investment | $ 336 |
Post-modification recorded investment | $ 281 |
Payment Deferral [Member] | Single Family Owner Occupied [Member] |  |
Total contracts | 3 |
Pre-modification recorded investment | $ 331 |
Post-modification recorded investment | $ 279 |
Payment Deferral [Member] | Home Equity Lines [Member] |  |
Total contracts | 1 |
Pre-modification recorded investment | $ 5 |
Post-modification recorded investment | $ 2 |

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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524 + Details
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- Definition Amount, after troubled debt restructuring, of modified financing receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524 + Details
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- Definition Amount, before troubled debt restructuring, of financing receivable to be modified. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524 + Details
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- Definition Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953682-111524 + Details
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