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Note 4 - Loans and the Allowance for Credit Losses - Reversal of Accrued Interest (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Interest income reversed | $ 71 | $ 73 | $ 450 | $ 119
Commercial Portfolio Segment [Member] | Commercial Loans [Member] |  |  |  |
Interest income reversed | 17 | 6 | 28 | 10
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] |  |  |  |
Interest income reversed | 41 | 29 | 381 | 29
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] |  |  |  |
Interest income reversed | 2 | 26 | 7 | 40
Residential Portfolio Segment [Member] | Real Estate Loan [Member] |  |  |  |
Interest income reversed | 1 | 0 | 1 | 9
Residential Portfolio Segment [Member] | Equity Lines of Credit [Member] |  |  |  |
Interest income reversed | 3 | 0 | 18 | 10
Consumer Portfolio Segment [Member] | Automobile Loan [Member] |  |  |  |
Interest income reversed | 7 | 12 | 14 | 21
Consumer Portfolio Segment [Member] | Other Loans [Member] |  |  |  |
Interest income reversed | $ 0 | $ 0 | $ 1 | $ 0

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- Definition Amount of writeoff of accrued interest on financing receivable recognized by reversing interest income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3D -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-3D + Details
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