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Note 4 - Loans - Schedule of Nonaccrual Loans (Details) - USD ($) | Sep. 30, 2025 | Jan. 01, 2025 | Dec. 31, 2024 | Jan. 01, 2024
--- | --- | --- | --- | ---
Nonaccrual | $ 20,457,619 | $ 13,962,695 | $ 13,962,695 | $ 12,776,177
Nonaccrual, no allowance | 20,457,619 |  | 13,962,695 |
Loans past 90 days or more still accruing | 0 |  | 0 |
Consumer Portfolio Segment [Member] |  |  |  |
Nonaccrual | 0 | 0 | 0 | 0
Nonaccrual, no allowance | 0 |  | 0 |
Loans past 90 days or more still accruing | 0 |  | 0 |
Real Estate Loan [Member] | Residential Portfolio Segment [Member] |  |  |  |
Nonaccrual | 2,502,938 | 1,863,957 | 1,863,957 | 1,432,072
Nonaccrual, no allowance | 2,502,938 |  | 1,863,957 |
Loans past 90 days or more still accruing | 0 |  | 0 |
Real Estate Loan [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Nonaccrual | 7,060,968 | 1,205,025 | 1,205,025 | 450,392
Nonaccrual, no allowance | 7,060,968 |  | 1,205,025 |
Real Estate Loan [Member] | Construction Loans [Member] |  |  |  |
Nonaccrual | 10,893,713 | $ 10,893,713 | 10,893,713 | $ 10,893,713
Nonaccrual, no allowance | 10,893,713 |  | 10,893,713 |
Loans past 90 days or more still accruing | $ 0 |  | $ 0 |

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