Note 9 - Loans - Average Balance and Interest Income Recognized Related to Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Average Recorded Investment	$ 77,699	$ 81,040
Interest Income Recognized	436	174
Commercial Portfolio Segment [Member]
Average Recorded Investment	27,351	28,268
Interest Income Recognized	0	12
Real Estate Construction Portfolio Segment [Member]
Average Recorded Investment	0	4,229
Interest Income Recognized	0	97
Commercial Real Estate Portfolio Segment [Member]
Average Recorded Investment	37,909	40,116
Interest Income Recognized	429	57
Residential Mortgage and Equity Lines Portfolio Segment [Member]
Average Recorded Investment	12,439	8,427
Interest Income Recognized	$ 7	$ 8