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Note 1a - Nature of Operations, Basis of Presentation and Summary of Significant Accounting Policies (Details Textual) | 12 Months Ended
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Dec. 31, 2024 USD ($) shares | Dec. 31, 2023 USD ($) shares | Dec. 31, 2022 USD ($)
Number of Operating Segments | 1 |  |
Non Accrual Contractual Due (Day) | 90 days |  |
Financing Receivable, Individually Evaluated for Credit Loss | $ 56,497,000 | $ 69,963,000 |
Stock Repurchase Program, Repurchased, Shares (in shares) | shares | 283,270 | 904,152 |
Goodwill, Impairment Loss | $ 0 | $ 0 | $ 0
Minimum [Member] |  |  |
Financing Receivable, Individually Evaluated for Credit Loss | $ 250,000 |  |
Minimum [Member] | Land, Buildings and Improvements [Member] |  |  |
Property, Plant and Equipment, Useful Life (Year) | 4 years |  |
Minimum [Member] | Furniture Fixtures and Equipment [Member] |  |  |
Property, Plant and Equipment, Useful Life (Year) | 3 years |  |
Minimum [Member] | Nonaccrual Loans [Member] |  |  |
Financing Receivable, Individually Evaluated for Credit Loss | $ 250,000 |  |
Maximum [Member] | Land, Buildings and Improvements [Member] |  |  |
Property, Plant and Equipment, Useful Life (Year) | 30 years |  |
Maximum [Member] | Furniture Fixtures and Equipment [Member] |  |  |
Property, Plant and Equipment, Useful Life (Year) | 10 years |  |

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