Note 9 - Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Net book value, balance	$ 3,892
Net book value, balance	3,070	$ 3,892
Core Deposits [Member]
Net book value, balance	3,892	2,045
Core deposit intangible as result of Great State merger		2,425
Amortization expense	(822)	(578)
Net book value, balance	$ 3,070	$ 3,892