Note 5 - Mortgage Servicing Rights - Schedule of Activity in Mortgage Servicing Rights (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Mortgage servicing rights, net	$ 8,334		$ 8,334		$ 8,739
Mortgage Servicing Rights [Member]
Beginning balance	9,171	$ 7,318	8,739	$ 7,100
Mortgage servicing rights capitalized	1,490	736	2,433	1,201
Amortization of mortgage servicing rights	(1,111)	(388)	(1,622)	(635)
Ending balance	9,550	7,666	9,550	7,666
Beginning balance	(153)	0	0	0
Impairment of servicing rights	(1,063)	0	(1,216)	0
Ending balance	(1,216)	0	(1,216)	0
Mortgage servicing rights, net	$ 8,334	$ 7,666	$ 8,334	$ 7,666