Note 6 - Loan Servicing - Schedule of Amortization of Mortgage Servicing Rights Netted Against Loan Servicing Fee Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Mortgages [Member]
Beginning of period	$ 6,856	$ 7,966	$ 7,354	$ 8,748
Additions	112	49	139	497
Disposals	(82)	(151)	(255)	(715)
Amortized to expense	(171)	(229)	(523)	(895)
End of period	6,715	7,635	6,715	7,635
Small Business Administration Loans [Member]
Beginning of period	1,846	2,490	2,167	2,769
Additions	46	46	47	230
Disposals	(103)	(28)	(274)	(299)
Amortized to expense	(65)	(89)	(216)	(281)
End of period	$ 1,724	$ 2,419	$ 1,724	$ 2,419