Note 19 - Condensed Statement of Income (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Condensed Income Statements, Captions [Line Items]
Securities gains									$ 1,788	$ 585	$ 1,781
Net unrealized gain (loss) on investment equity securities									926	(47)	770
Provision for income taxes	$ 1,052	$ 685	$ 951	$ 1,273	$ 1,056	$ 914	$ 998	$ (406)	3,961	2,562	2,850
Net income	$ 4,149	$ 3,424	$ 3,869	$ 5,050	$ 4,151	$ 3,778	$ 3,934	$ 220	16,492	12,083	12,357
Parent Company [Member]
Condensed Income Statements, Captions [Line Items]
Dividends from subsidiary									5,733	4,413	3,820
Interest, dividend and other income									386	346	292
Securities gains									1,788	585	1,781
Net unrealized gain (loss) on investment equity securities									926	(47)	770
Total income									8,833	5,297	6,663
Expenses									491	457	420
Income before applicable income taxes and equity in undistributed income of subsidiary									8,342	4,840	6,243
Provision for income taxes									724	97	714
Income before equity in undistributed income of subsidiary									7,618	4,743	5,529
Equity in undistributed income of subsidiary									8,874	7,340	6,828
Net income									$ 16,492	$ 12,083	$ 12,357