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Note 5 - Loans and the Allowance for Credit Losses - Outstanding Loans (Details) - USD ($) | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | --- | ---
Loans | $ 1,512,056,000 | $ 1,015,424,000 |  |
Deferred loan costs, net | 3,737,000 | 3,147,000 |  |
Loans, amortized cost basis | 1,515,793,000 | 1,018,571,000 |  |
Allowance for credit losses | (19,959,000) | (13,196,000) |  |
Loans, net | 1,495,834,000 | 1,005,375,000 |  |
Commercial Portfolio Segment [Member] | Commercial Loans [Member] |  |  |  |
Loans | 167,851,000 | 77,444,000 |  |
Loans, amortized cost basis | 168,696,000 | 78,194,000 |  |
Allowance for credit losses | (3,246,000) | (1,265,000) | $ (1,134,000) | $ (892,000)
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] |  |  |  |
Loans | 157,526,000 | 118,866,000 |  |
Loans, amortized cost basis | 157,768,000 | 119,110,000 |  |
Allowance for credit losses | (3,973,000) | (1,802,000) | (1,738,000) | (1,086,000)
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] |  |  |  |
Loans | 1,002,627,000 | 646,378,000 |  |
Loans, amortized cost basis | 1,003,944,000 | 646,951,000 |  |
Allowance for credit losses | (10,605,000) | (7,459,000) | (6,678,000) | (4,980,000)
Commercial Portfolio Segment [Member] | Construction Loans [Member] |  |  |  |
Loans | 40,168,000 | 53,503,000 |  |
Loans, amortized cost basis | 40,022,000 | 53,285,000 |  |
Allowance for credit losses | (514,000) | (815,000) | (797,000) | (1,500,000)
Residential Portfolio Segment [Member] | Real Estate Loan [Member] |  |  |  |
Loans | 33,116,000 | 11,539,000 |  |
Loans, amortized cost basis | 33,142,000 | 11,568,000 |  |
Allowance for credit losses | (258,000) | (102,000) | (137,000) | (138,000)
Residential Portfolio Segment [Member] | Equity Lines of Credit [Member] |  |  |  |
Loans | 53,647,000 | 37,888,000 |  |
Loans, amortized cost basis | 54,594,000 | 38,755,000 |  |
Allowance for credit losses | (502,000) | (460,000) | (439,000) | (687,000)
Consumer Portfolio Segment [Member] |  |  |  |
Loans, amortized cost basis | 57,627,000 | 70,708,000 |  |
Consumer Portfolio Segment [Member] | Automobile Loan [Member] |  |  |  |
Loans | 39,595,000 | 64,734,000 |  |
Loans, amortized cost basis | 40,020,000 | 65,584,000 |  |
Allowance for credit losses | (591,000) | (1,215,000) | (1,865,000) | (1,289,000)
Consumer Portfolio Segment [Member] | Other Loans [Member] |  |  |  |
Loans | 17,526,000 | 5,072,000 |  |
Loans, amortized cost basis | 17,607,000 | 5,124,000 |  |
Allowance for credit losses | $ (270,000) | $ (78,000) | $ (79,000) | $ (145,000)

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