Note 3 - Loans and Allowance for Credit Losses - Allowance for Credit Losses on Unfunded Commitments (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Balance	$ 9,094	$ 8,225	$ 8,225
Recovery of credit losses	1,312	(389)	(1,278)
Balance	10,328	10,181	9,094
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Balance		2,342	2,342
Unfunded Loan Commitment [Member]
Balance	259	35	35
Recovery of credit losses	(25)	21
Balance	241	263	259
Unfunded Loan Commitment [Member] | Frontier Community Bank [Member]
FCB acquisition	$ 7
Unfunded Loan Commitment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Balance		$ 207	$ 207