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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, 2021 USD ($) | Dec. 31, 2020 USD ($)
Total contracts |  | 7 | 12
Pre-modification recorded investment |  | $ 1,361 | $ 4,958
Post-modification recorded investment | [1] | $ 1,361 | $ 4,927
Total contracts, payment default |  | 0 | 1
Recorded investment, payment default |  | $ 0 | $ 53
Single Family Owner Occupied [Member] |  |  |
Total contracts, payment default |  | 0 | 1
Recorded investment, payment default |  | $ 0 | $ 53
Below Market Interest Rate [Member] | Single Family Owner Occupied [Member] |  |  |
Total contracts |  | 0 | 1
Pre-modification recorded investment |  | $ 0 | $ 50
Post-modification recorded investment | [1] | $ 0 | $ 50
Below Market Interest Rate and Extended Payment Term [Member] |  |  |
Total contracts |  | 5 | 0
Pre-modification recorded investment |  | $ 567 | $ 0
Post-modification recorded investment | [1] | $ 567 | $ 0
Below Market Interest Rate and Extended Payment Term [Member] | Single Family Owner Occupied [Member] |  |  |
Total contracts |  | 4 | 0
Pre-modification recorded investment |  | $ 402 | $ 0
Post-modification recorded investment | [1] | $ 402 | $ 0
Below Market Interest Rate and Extended Payment Term [Member] | Single Family Non-owner Occupied [Member] |  |  |
Total contracts |  | 1 | 0
Pre-modification recorded investment |  | $ 165 | $ 0
Post-modification recorded investment | [1] | $ 165 | $ 0
Payment Deferral [Member] |  |  |
Total contracts |  | 2 | 11
Pre-modification recorded investment |  | $ 794 | $ 4,908
Post-modification recorded investment | [1] | $ 794 | $ 4,877
Payment Deferral [Member] | Single Family Owner Occupied [Member] |  |  |
Total contracts |  | 1 | 5
Pre-modification recorded investment |  | $ 41 | $ 4,908
Post-modification recorded investment |  | $ 41 | $ 4,877
Payment Deferral [Member] | Single Family Non-owner Occupied [Member] |  |  |
Total contracts |  | 1 |
Pre-modification recorded investment |  | $ 753 |
Post-modification recorded investment | [1] | $ 753 |
Payment Deferral [Member] | Construction, Development and Other Land [Member] |  |  |
Total contracts |  | 0 | 3
Pre-modification recorded investment |  | $ 0 | $ 1,708
Post-modification recorded investment |  | $ 0 | $ 1,708
Payment Deferral [Member] | Non-farm, Non-residential [Member] |  |  |
Total contracts |  | 0 | 3
Pre-modification recorded investment |  | $ 0 | $ 2,115
Post-modification recorded investment | [1] | $ 0 | $ 2,115
Payment Deferral [Member] | Home Equity Lines [Member] |  |  |
Total contracts |  | 0 | 0
Pre-modification recorded investment |  | $ 0 | $ 0
Post-modification recorded investment |  | $ 0 | $ 0
[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 http://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 http://asc.fasb.org/extlink&oid=123577603&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=123577603&loc=SL6953676-111524 + Details
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