Note 3 - Fair Value Measurements (Tables)
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12 Months Ended |
Dec. 31, 2025 |
| Notes Tables |
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| Fair Value, by Balance Sheet Grouping [Table Text Block] |
| | | | | | | Fair Value Measurements at December 31, 2025 Using: | |
| | | | | | | | | | | | | | | | | | | Total Fair | |
| | | Carrying Value | | | Level 1 | | | Level 2 | | | Level 3 | | | Value | |
| Financial assets: | | | | | | | | | | | | | | | | | | | | |
| Loans, net | | | 1,495,834,000 | | | | - | | | | - | | | | 1,494,830,000 | | | | 1,494,830,000 | |
| Financial liabilities: | | | | | | | | | | | | | | | | | | | | |
| Time deposits | | | 210,729,000 | | | | - | | | | 209,147,000 | | | | - | | | | 209,147,000 | |
| Repurchase agreements | | | 97,855,000 | | | | - | | | | 97,855,000 | | | | - | | | | 97,855,000 | |
| Borrowings | | | 21,013,000 | | | | - | | | | 20,599,000 | | | | - | | | | 20,599,000 | |
| | | | | | | Fair Value Measurements at December 31, 2024 Using: | |
| | | | | | | | | | | | | | | | | | | Total Fair | |
| | | Carrying Value | | | Level 1 | | | Level 2 | | | Level 3 | | | Value | |
| Financial assets: | | | | | | | | | | | | | | | | | | | | |
| Loans, net | | | 1,005,375,000 | | | | - | | | | - | | | | 981,114,000 | | | | 981,114,000 | |
| Financial liabilities: | | | | | | | | | | | | | | | | | | | | |
| Time deposits | | | 94,189,000 | | | | - | | | | 94,161,000 | | | | - | | | | 94,161,000 | |
| Repurchase agreements | | | 22,073,000 | | | | - | | | | 22,073,000 | | | | - | | | | 22,073,000 | |
| Borrowings | | | 15,000,000 | | | | - | | | | 13,967,000 | | | | - | | | | 13,967,000 | |
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| Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] |
| | | | | | | Fair Value Measurements at | |
| | | | | | | December 31, 2025 Using | |
| | | | | | | Quoted | | | | | | | | | |
| | | | | | | Prices in | | | | | | | | | |
| | | | | | | Active | | | Significant | | | | | |
| | | | | | | Markets for | | | Other | | | Significant | |
| | | | | | | Identical | | | Observable | | | Unobservable | |
| | | Total Fair | | | Assets | | | Inputs | | | Inputs | |
| | | Value | | | (Level 1) | | | (Level 2) | | | (Level 3) | |
| Assets: | | | | | | | | | | | | | | | | |
| U.S. Government-sponsored agencies collateralized by mortgage obligations-residential | | $ | 253,165,000 | | | $ | - | | | $ | 253,165,000 | | | $ | - | |
| U.S. Government agencies collateralized by mortgage obligations-commercial | | | 134,764,000 | | | | - | | | | 134,764,000 | | | | - | |
| Obligations of states and political subdivisions | | | 88,666,000 | | | | - | | | | 88,666,000 | | | | - | |
| | | $ | 476,595,000 | | | $ | - | | | $ | 476,595,000 | | | $ | - | |
| | | | | | | Fair Value Measurements at | |
| | | | | | | December 31, 2024 Using | |
| | | | | | | Quoted | | | | | | | | | |
| | | | | | | Prices in | | | | | | | | | |
| | | | | | | Active | | | Significant | | | | | |
| | | | | | | Markets for | | | Other | | | Significant | |
| | | | | | | Identical | | | Observable | | | Unobservable | |
| | | Total Fair | | | Assets | | | Inputs | | | Inputs | |
| | | Value | | | (Level 1) | | | (Level 2) | | | (Level 3) | |
| Assets: | | | | | | | | | | | | | | | | |
| U.S. Government-sponsored agencies collateralized by mortgage obligations-residential | | $ | 228,391,000 | | | $ | - | | | $ | 228,391,000 | | | $ | - | |
| U.S. Government agencies collateralized by mortgage obligations-commercial | | | 121,870,000 | | | | - | | | | 121,870,000 | | | | - | |
| Obligations of states and political subdivisions | | | 87,474,000 | | | | - | | | | 87,474,000 | | | | - | |
| | | $ | 437,735,000 | | | $ | - | | | $ | 437,735,000 | | | $ | - | |
|
| Fair Value Measurements, Nonrecurring [Table Text Block] |
| | | | | | | Fair Value Measurements at December 31, 2025 Using: | |
| | | | | | | Quoted | | | | | | | | | | | | | |
| | | | | | | Prices in | | | | | | | | | | | | | |
| | | | | | | Active | | | Significant | | | | | | | | | |
| | | | | | | Markets for | | | Other | | | Significant | | | | | |
| | | | | | | Identical | | | Observable | | | Unobservable | | | | | |
| | | Total | | | Assets | | | Inputs | | | Inputs | | | Total | |
| | | Fair Value | | | (Level 1) | | | (Level 2) | | | (Level 3) | | | Losses | |
| Assets: | | | | | | | | | | | | | | | | | | | | |
| Collateral-dependent loans | | | | | | | | | | | | | | | | | | | | |
| Commercial | | $ | 84 | | | $ | - | | | $ | - | | | $ | 84 | | | $ | 39 | |
| Agricultural | | | 1,904 | | | | - | | | | - | | | | 1,904 | | | | 1,448 | |
| Total | | $ | 1,988 | | | $ | - | | | $ | - | | | $ | 1,988 | | | $ | 1,487 | |
| | | | | | | | | | | | | | | | | | | | | |
| Other Real Estate: | | | | | | | | | | | | | | | | | | | | |
| RE – Residential | | $ | 91 | | | $ | - | | | $ | - | | | $ | 91 | | | $ | - | |
| Equity lines of credit | | | 135 | | | | | | | | | | | | 135 | | | $ | - | |
| Total | | $ | 226 | | | $ | - | | | $ | - | | | $ | 226 | | | $ | - | |
| | | | | | | Fair Value Measurements at December 31, 2024 Using: | |
| | | | | | | Quoted | | | | | | | | | | | | | |
| | | | | | | Prices in | | | | | | | | | | | | | |
| | | | | | | Active | | | Significant | | | | | | | | | |
| | | | | | | Markets for | | | Other | | | Significant | | | | | |
| | | | | | | Identical | | | Observable | | | Unobservable | | | | | |
| | | Total | | | Assets | | | Inputs | | | Inputs | | | Total | |
| | | Fair Value | | | (Level 1) | | | (Level 2) | | | (Level 3) | | | Losses | |
| Assets: | | | | | | | | | | | | | | | | | | | | |
| Collateral-dependent loans | | | | | | | | | | | | | | | | | | | | |
| Commercial | | $ | 24 | | | $ | - | | | $ | - | | | $ | 24 | | | $ | 1 | |
| | | | | | | | | | | | | | | | | | | | | |
| Other Real Estate: | | | | | | | | | | | | | | | | | | | | |
| RE – Residential | | $ | 91 | | | $ | - | | | $ | - | | | $ | 91 | | | $ | 50 | |
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| Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] |
| | | | | | | | | | | | | Range | | | Range | |
| | | Fair Value | | | Fair Value | | Valuation | | | (Weighted Average) | | | (Weighted Average) | |
| Description | | 12/31/2025 | | | 12/31/2024 | | Technique | Significant Unobservable Input | | 12/31/2025 | | | 12/31/2024 | |
| Collateral-dependent loans: | | | | | | | | | | | | | | | | | | |
| Commercial | | $ | 84 | | | $ | 24 | | Third Party appraisals | Management Adjustments to Reflect Current Conditions and Selling Costs | | | 14% - 100% (45%) | | | | 45 | % |
| Agricultural | | | 1,904 | | | | - | | Third Party appraisals | Management Adjustments to Reflect Current Conditions and Selling Costs | | | 2% - 100% (43%) | | | | | |
| Total | | $ | 1,988 | | | $ | 24 | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | |
| Other Real Estate: | | | | | | | | | | | | | | | | | | |
| RE – Residential | | $ | 91 | | | $ | 91 | | Third Party appraisals | Management Adjustments to Reflect Current Conditions and Selling Costs | | | 60 | % | | | 60 | % |
| Equity lines of credit | | | 135 | | | | - | | Third Party appraisals | Management Adjustments to Reflect Current Conditions and Selling Costs | | | 10 | % | | | | |
| Total | | $ | 226 | | | $ | 91 | | | | | | | | | | | |
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