Note 10 - Intangible Assets - Mortgage Servicing Activity (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Balance	$ 2,172	$ 1,855	$ 1,855
Originations	1,710	674	1,097
Amortization	(1,002)	(535)	(780)
Balance	2,880	1,994	2,172
Fair value of mortgage servicing rights	$ 2,956	$ 2,922	$ 3,390