Note 4 - Loans, Allowance for Credit Losses and Other Real Estate Owned - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Balance at beginning of period	$ 22,313	$ 23,737	$ 23,514	$ 23,854
(Reversal) provision	0	2	0	2
Chargeoffs	(1,917)	(972)	(4,542)	(2,232)
Recoveries	822	1,115	2,246	2,258
Total allowance for credit losses	21,218	23,882	21,218	23,882
Commercial Portfolio Segment [Member]
Balance at beginning of period	6,536	6,858	6,966	9,205
(Reversal) provision	(164)	10	(837)	(2,425)
Chargeoffs	0	(56)	(20)	(56)
Recoveries	72	80	335	168
Total allowance for credit losses	6,444	6,892	6,444	6,892
Commercial Real Estate Portfolio Segment [Member]
Balance at beginning of period	5,916	6,752	6,529	5,660
(Reversal) provision	14	(754)	(631)	314
Chargeoffs	0	0	0	0
Recoveries	14	705	46	729
Total allowance for credit losses	5,944	6,703	5,944	6,703
Construction Portfolio Segment [Member]
Balance at beginning of period	96	5	2	6
(Reversal) provision	32	(3)	126	(4)
Chargeoffs	0	0	0	0
Recoveries	0	0	0	0
Total allowance for credit losses	128	2	128	2
Residential Portfolio Segment [Member]
Balance at beginning of period	35	57	45	47
(Reversal) provision	0	(7)	(10)	3
Chargeoffs	0	0	0	0
Recoveries	0	0	0	0
Total allowance for credit losses	35	50	35	50
Consumer Portfolio Segment [Member]
Balance at beginning of period	9,730	10,065	9,972	8,936
(Reversal) provision	118	756	1,352	2,114
Chargeoffs	(1,917)	(916)	(4,522)	(2,176)
Recoveries	736	330	1,865	1,361
Total allowance for credit losses	$ 8,667	$ 10,235	$ 8,667	$ 10,235