Note 23 - Parent Company Condensed Financial Information - Condensed Statements 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, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other income													$ 16	$ 63	$ 103
Unrealized gain (loss) on equity securities													328	(194)	32
Other operating expenses													(3,373)	(3,318)	(3,418)
Income before income taxes and equity in undistributed net income of shareholders													2,247	1,771	3,827
Income tax benefit	$ (529)	$ (596)	$ (497)	$ (618)	$ (485)	$ (413)	$ (405)	$ (389)	$ (440)	$ (537)	$ (568)	$ (442)	(2,240)	(1,692)	(1,987)
Net Income	$ 2,819	$ 2,936	$ 2,730	$ 2,939	$ 2,853	$ 2,746	$ 2,438	$ 2,094	$ 2,403	$ 2,915	$ 2,860	$ 2,147	11,424	10,131	10,325
Parent Company [Member]
Dividend income from subsidiaries													2,685	2,730	4,450
Other income													69	59	59
Unrealized gain (loss) on equity securities													328	(194)	32
Other operating expenses													(835)	(824)	(714)
Income tax benefit													106	315	199
Income before equity in undistributed net income of subsidiaries													(2,353)	(2,086)	(4,026)
Equity in undistributed net income of subsidiaries													(9,071)	(8,045)	(6,299)
Net Income													$ 11,424	$ 10,131	$ 10,325