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Note 1 - Summary of Significant Accounting Policies (Details Textual) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Mar. 07, 2022
Number of Operating Segments |  | 2 |  |
Effective Income Tax Rate Reconciliation, Insurance Captive, Percent | (0.40%) | (0.20%) | (0.40%) |
Gain (Loss) on Disposition of Business | $ (0) | $ (870,000) | $ (0) |
Mortgage Servicing Rights, Amortization Period (Year) | 7 years |  |  |
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss | $ 4,000,000 | 4,000,000 |  |
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Ending Balance | 0 | 0 |  |
Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss | 2,000,000 | 2,000,000 |  |
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Ending Balance | $ 0 | 0 |  |
Minimum [Member] |  |  |  |
Property, Plant and Equipment, Useful Life (Year) | 3 years |  |  |
Maximum [Member] |  |  |  |
Property, Plant and Equipment, Useful Life (Year) | 40 years |  |  |
Landmark Financial Advisors, LLC (LFA) [Member] |  |  |  |
Gain (Loss) on Disposition of Business |  | $ (870,000) |  |
Kentucky Bancshares [Member] |  |  |  |
Effective Income Tax Rate Reconciliation, Insurance Captive, Percent | 0.20% | 0.30% | 0.20% |
Commonwealth [Member] |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  | 100.00%
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual |  | $ 38,600,000 |  |
Landmark Financial Advisors, LLC (LFA) [Member] |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  | 60.00%
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual |  | $ 483,000 |  |

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