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Note 4 - Loans Receivable and Credit Disclosures - Troubled Debt Restructurings (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Financing receivable modifications, number of contracts | 9 | 6
Financing receivable modifications, pre-modification outstanding, recorded investment | $ 1,470 | $ 10,273
Financing receivable modifications, post modification outstanding, recorded investment | $ 1,470 | $ 10,273
Construction Real Estate [Member] |  |
Financing receivable modifications, number of contracts | 0 | 0
Financing receivable modifications, pre-modification outstanding, recorded investment | $ 0 | $ 0
Financing receivable modifications, post modification outstanding, recorded investment | $ 0 | $ 0
Family Residential Real Estate 1-4 [Member] |  |
Financing receivable modifications, number of contracts | 3 | 0
Financing receivable modifications, pre-modification outstanding, recorded investment | $ 578 | $ 0
Financing receivable modifications, post modification outstanding, recorded investment | $ 578 | $ 0
Commercial Real Estate Portfolio Segment [Member] |  |
Financing receivable modifications, number of contracts | 0 | 2
Financing receivable modifications, pre-modification outstanding, recorded investment | $ 0 | $ 10,192
Financing receivable modifications, post modification outstanding, recorded investment | $ 0 | $ 10,192
Agriculture Real Estate [Member] |  |
Financing receivable modifications, number of contracts | 2 | 0
Financing receivable modifications, pre-modification outstanding, recorded investment | $ 534 | $ 0
Financing receivable modifications, post modification outstanding, recorded investment | $ 534 | $ 0
Commercial Portfolio Segment [Member] |  |
Financing receivable modifications, number of contracts | 2 | 0
Financing receivable modifications, pre-modification outstanding, recorded investment | $ 64 | $ 0
Financing receivable modifications, post modification outstanding, recorded investment | $ 64 | $ 0
Agriculture [Member] |  |
Financing receivable modifications, number of contracts | 2 | 3
Financing receivable modifications, pre-modification outstanding, recorded investment | $ 294 | $ 54
Financing receivable modifications, post modification outstanding, recorded investment | $ 294 | $ 54
Consumer and Other [Member] |  |
Financing receivable modifications, number of contracts | 0 | 1
Financing receivable modifications, pre-modification outstanding, recorded investment | $ 0 | $ 27
Financing receivable modifications, post modification outstanding, recorded investment | $ 0 | $ 27

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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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