Note 6 - Loan Servicing - Schedule of Amortization of Mortgage Servicing Rights Netted Against Loan Servicing Fee Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Mortgages [Member]
Beginning of period	$ 8,264	$ 9,956	$ 8,748	$ 10,529
Additions	148	581	448	1,209
Disposals	(173)	(719)	(564)	(1,341)
Amortized to expense	(273)	(500)	(666)	(1,079)
End of period	7,966	9,318	7,966	9,318
Small Business Administration Loans [Member]
Beginning of period	2,784	3,308	2,769	3,436
Additions	21	131	184	207
Disposals	(221)	(78)	(272)	(161)
Amortized to expense	(94)	(121)	(191)	(242)
End of period	$ 2,490	$ 3,240	$ 2,490	$ 3,240