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Note 5 - Loans and the Allowance for Credit Losses - Aging Analysis of the Loan Portfolio (Details) - USD ($) | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Loans, Total | $ 1,515,793,000 | $ 1,018,571,000
90 Days and Still Accruing | 0 | 0
Nonaccrual | 15,089,000 | 4,105,000
Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans, Total | 7,668,000 | 8,521,000
Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans, Total | 923,000 | 1,372,000
Financial Asset, Past Due [Member] |  |
Loans, Total | 23,680,000 | 13,998,000
Financial Asset, Not Past Due [Member] |  |
Loans, Total | 1,492,113,000 | 1,004,573,000
Commercial Portfolio Segment [Member] | Commercial Loans [Member] |  |
Loans, Total | 168,696,000 | 78,194,000
90 Days and Still Accruing | 0 | 0
Nonaccrual | 611,000 | 355,000
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans, Total | 2,809,000 | 1,074,000
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans, Total | 572,000 | 533,000
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Financial Asset, Past Due [Member] |  |
Loans, Total | 3,992,000 | 1,962,000
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Financial Asset, Not Past Due [Member] |  |
Loans, Total | 164,704,000 | 76,232,000
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] |  |
Loans, Total | 157,768,000 | 119,110,000
90 Days and Still Accruing | 0 | 0
Nonaccrual | 10,509,000 | 567,000
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans, Total | 395,000 | 273,000
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans, Total | 0 | 0
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Financial Asset, Past Due [Member] |  |
Loans, Total | 10,904,000 | 840,000
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Financial Asset, Not Past Due [Member] |  |
Loans, Total | 146,864,000 | 118,270,000
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] |  |
Loans, Total | 1,003,944,000 | 646,951,000
90 Days and Still Accruing | 0 | 0
Nonaccrual | 2,000,000 | 1,579,000
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans, Total | 1,160,000 | 1,954,000
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans, Total | 0 | 82,000
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Financial Asset, Past Due [Member] |  |
Loans, Total | 3,160,000 | 3,615,000
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Financial Asset, Not Past Due [Member] |  |
Loans, Total | 1,000,784,000 | 643,336,000
Commercial Portfolio Segment [Member] | Construction Loans [Member] |  |
Loans, Total | 40,022,000 | 53,285,000
90 Days and Still Accruing | 0 | 0
Nonaccrual | 0 | 0
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans, Total | 1,466,000 | 2,133,000
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans, Total | 0 | 0
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Financial Asset, Past Due [Member] |  |
Loans, Total | 1,466,000 | 2,133,000
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Financial Asset, Not Past Due [Member] |  |
Loans, Total | 38,556,000 | 51,152,000
Residential Portfolio Segment [Member] | Real Estate Loan [Member] |  |
Loans, Total | 33,142,000 | 11,568,000
90 Days and Still Accruing | 0 | 0
Nonaccrual | 215,000 | 83,000
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans, Total | 15,000 | 348,000
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans, Total | 0 | 319,000
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Financial Asset, Past Due [Member] |  |
Loans, Total | 230,000 | 750,000
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Financial Asset, Not Past Due [Member] |  |
Loans, Total | 32,912,000 | 10,818,000
Residential Portfolio Segment [Member] | Equity Lines of Credit [Member] |  |
Loans, Total | 54,594,000 | 38,755,000
90 Days and Still Accruing | 0 | 0
Nonaccrual | 988,000 | 650,000
Residential Portfolio Segment [Member] | Equity Lines of Credit [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans, Total | 835,000 | 1,416,000
Residential Portfolio Segment [Member] | Equity Lines of Credit [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans, Total | 191,000 | 189,000
Residential Portfolio Segment [Member] | Equity Lines of Credit [Member] | Financial Asset, Past Due [Member] |  |
Loans, Total | 2,014,000 | 2,255,000
Residential Portfolio Segment [Member] | Equity Lines of Credit [Member] | Financial Asset, Not Past Due [Member] |  |
Loans, Total | 52,580,000 | 36,500,000
Consumer Portfolio Segment [Member] |  |
Loans, Total | 57,627,000 | 70,708,000
Consumer Portfolio Segment [Member] | Automobile Loan [Member] |  |
Loans, Total | 40,020,000 | 65,584,000
90 Days and Still Accruing | 0 | 0
Nonaccrual | 745,000 | 792,000
Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans, Total | 943,000 | 1,251,000
Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans, Total | 159,000 | 242,000
Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Financial Asset, Past Due [Member] |  |
Loans, Total | 1,847,000 | 2,285,000
Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Financial Asset, Not Past Due [Member] |  |
Loans, Total | 38,173,000 | 63,299,000
Consumer Portfolio Segment [Member] | Other Loans [Member] |  |
Loans, Total | 17,607,000 | 5,124,000
90 Days and Still Accruing | 0 | 0
Nonaccrual | 21,000 | 79,000
Consumer Portfolio Segment [Member] | Other Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans, Total | 45,000 | 72,000
Consumer Portfolio Segment [Member] | Other Loans [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans, Total | 1,000 | 7,000
Consumer Portfolio Segment [Member] | Other Loans [Member] | Financial Asset, Past Due [Member] |  |
Loans, Total | 67,000 | 158,000
Consumer Portfolio Segment [Member] | Other Loans [Member] | Financial Asset, Not Past Due [Member] |  |
Loans, Total | $ 17,540,000 | $ 4,966,000

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