Note 21 - Revenue From Contracts With Customers - Noninterest 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
Noninterest income													$ 6,446	$ 5,761	$ 5,528
Net gains on loans and investments													2,774	2,522	1,076
Increase in cash value of life insurance													219	210	211
Other													112	106	111
Other noninterest income													3,105	2,838	1,398
Total noninterest income	$ 2,291	$ 2,270	$ 2,552	$ 2,438	$ 2,207	$ 2,616	$ 2,320	$ 1,456	$ 1,820	$ 1,833	$ 1,768	$ 1,505	9,551	8,599	6,926
Net (gain) loss on sales of foreclosed real estate													0	4	(114)
Deposit Account [Member]
Noninterest income													1,874	1,788	2,088
ATM and Debit Card Fees [Member]
Noninterest income													4,076	3,488	2,812
Investment Advisory, Management and Administrative Service [Member]
Noninterest income													377	365	504
Product and Service, Other [Member]
Noninterest income													$ 119	$ 120	$ 124