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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, 2022 USD ($) | Dec. 31, 2021 USD ($)
Total contracts |  | 6 | 7
Pre-modification recorded investment |  | $ 525 | $ 1,361
Post-modification recorded investment | [1] | $ 513 | $ 1,361
Below Market Interest Rate [Member] | Single Family Owner Occupied [Member] |  |  |
Total contracts |  | 1 | 0
Pre-modification recorded investment |  | $ 31 | $ 0
Post-modification recorded investment | [1] | $ 32 | $ 0
Below Market Interest Rate and Extended Payment Term [Member] |  |  |
Total contracts |  | 0 | 5
Pre-modification recorded investment |  | $ 0 | $ 567
Post-modification recorded investment | [1] | $ 0 | $ 567
Below Market Interest Rate and Extended Payment Term [Member] | Single Family Owner Occupied [Member] |  |  |
Total contracts |  | 0 | 4
Pre-modification recorded investment |  | $ 0 | $ 402
Post-modification recorded investment | [1] | $ 0 | $ 402
Below Market Interest Rate and Extended Payment Term [Member] | Single Family Non-owner Occupied [Member] |  |  |
Total contracts |  | 0 | 1
Pre-modification recorded investment |  | $ 0 | $ 165
Post-modification recorded investment | [1] | $ 0 | $ 165
Payment Deferral [Member] |  |  |
Total contracts |  | 5 | 2
Pre-modification recorded investment |  | $ 494 | $ 794
Post-modification recorded investment | [1] | $ 481 | $ 794
Payment Deferral [Member] | Single Family Owner Occupied [Member] |  |  |
Total contracts |  | 5 | 1
Pre-modification recorded investment |  | $ 494 | $ 41
Post-modification recorded investment |  | $ 481 | $ 41
Payment Deferral [Member] | Single Family Non-owner Occupied [Member] |  |  |
Total contracts |  | 0 | 1
Pre-modification recorded investment |  | $ 0 | $ 753
Post-modification recorded investment | [1] | $ 0 | $ 753
[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://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI https://asc.fasb.org/extlink&oid=123577603&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 https://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524 + Details
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