Note 9 - Loans - Average Balance and Interest Income Recognized Related to Nonaccrual Loans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Average Recorded Investment	$ 71,328	$ 70,457	$ 77,319	$ 77,509
Interest Income Recognized	170	404	133	331
Commercial Portfolio Segment [Member]
Average Recorded Investment	20,518	21,948	31,919	29,648
Interest Income Recognized	4	7	0	0
Real Estate Construction Portfolio Segment [Member]
Average Recorded Investment	0	0	0	0
Interest Income Recognized	0	0	0	0
Commercial Real Estate Portfolio Segment [Member]
Average Recorded Investment	39,069	37,650	30,073	33,969
Interest Income Recognized	166	397	126	317
Residential Mortgage and Equity Lines Portfolio Segment [Member]
Average Recorded Investment	11,741	10,858	15,284	13,870
Interest Income Recognized	0	0	7	14
Installment and Other Loans [Member ]
Average Recorded Investment	0	1	43	22
Interest Income Recognized	$ 0	$ 0	$ 0	$ 0