Note 1 - Summary of Significant Accounting Policies (Details Textual)	12 Months Ended
	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Jan. 01, 2024 USD ($)	Mar. 07, 2022
Number of Operating Segments		2
Gain (Loss) on Disposition of Business	$ (0)	$ (0)	$ (870,000)
Effective Income Tax Rate Reconciliation, Insurance Captive, Percent	0.25%	(0.40%)	(0.19%)
Mortgage Servicing Rights, Amortization Period	7 years
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Accrued interest receivable
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	$ 0
Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Accrued interest receivable
Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss	$ 1,000,000	2,000,000
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Ending Balance	0	0
Equity, Attributable to Parent	$ 940,476,000	$ 858,103,000
Accounting Standards Update 2023-02 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Equity, Attributable to Parent				$ 2,500,000
Minimum [Member]
Property, Plant and Equipment, Useful Life	3 years
Maximum [Member]
Property, Plant and Equipment, Useful Life	40 years
Landmark Financial Advisors, LLC (LFA) [Member]
Gain (Loss) on Disposition of Business			$ (870,000)
Commonwealth [Member]
Business Acquisition, Percentage of Voting Interests Acquired					100.00%
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
Kentucky Bancshares [Member]
Effective Income Tax Rate Reconciliation, Insurance Captive, Percent		0.20%	0.29%