Note 5 - Loans - Average Balance and Interest Income Recognized Related to Impaired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Average Recorded Investment	$ 71,371	$ 72,740
Interest Income Recognized	435	1,074	$ 1,000
Commercial Portfolio Segment [Member]
Average Recorded Investment	28,109	21,453
Interest Income Recognized	4	0
Commercial Real Estate Portfolio Segment [Member]
Average Recorded Investment	28,983	38,047
Interest Income Recognized	405	1,044
Real Estate Construction Portfolio Segment [Member]
Average Recorded Investment		3,805
Interest Income Recognized		0
Residential Mortgage and Equity Lines Portfolio Segment [Member]
Average Recorded Investment	14,251	9,435
Interest Income Recognized	26	$ 30
Installment and Other Loans [Member ]
Average Recorded Investment	28
Interest Income Recognized	$ 0