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Note 3 - Loans and Allowance for Loan Losses - Nonaccrual Loan by Loan Category (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Nonaccrual loans | $ 1,263 | $ 1,727
Agricultural [Member] |  |
Nonaccrual loans | 0 | 313
Commercial and Industrial [Member] |  |
Nonaccrual loans | 0 | 285
Consumer Portfolio Segment [Member] |  |
Nonaccrual loans | 0 | 0
Commercial Real Estate Portfolio Segment [Member] |  |
Nonaccrual loans | 0 | 279
Construction Real Estate [Member] |  |
Nonaccrual loans | 0 | 0
Residential Portfolio Segment [Member] |  |
Nonaccrual loans | $ 1,263 | $ 850

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- Definition Amortized cost of financing receivable on nonaccrual status. Excludes net investment in lease. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5111-111524 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 16 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919258-210447 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (3) Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (2) + Details
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