Note 9 - Loans - Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Balance	$ 146,485	$ 136,157	$ 136,157
(Reversal)/provision for credit losses on loans	3,255	9,339
Charge-offs	(7,907)	(221)	(5,490)
Recoveries	3,051	511
Net (charge-offs)/recoveries	(4,856)	290
Balance	144,884	145,786	146,485
Provision for credit losses	8,100	8,643
Commitments to Extend Credit [Member]
Balance	8,730	7,100	7,100
Balance	13,575	6,404	8,730
Provision for credit losses	4,845	(696)
Commercial Portfolio Segment [Member]
Balance	49,435	43,394	43,394
(Reversal)/provision for credit losses on loans	(60)	1,206
Charge-offs	(3,911)	(221)	(3,222)
Recoveries	511	359
Net (charge-offs)/recoveries	(3,400)	138
Balance	45,975	44,738	49,435
Commercial Portfolio Segment [Member] | Commitments to Extend Credit [Member]
Balance	4,840	3,725	3,725
Balance	8,275	3,177	4,840
Provision for credit losses	3,435	(548)
Real Estate Construction Portfolio Segment [Member]
Balance	10,417	6,302	6,302
(Reversal)/provision for credit losses on loans	483	1,128
Charge-offs	0	0	0
Recoveries	0	6
Net (charge-offs)/recoveries	0	6
Balance	10,900	7,436	10,417
Real Estate Construction Portfolio Segment [Member] | Commitments to Extend Credit [Member]
Balance	3,890	3,375	3,375
Balance	5,215	3,227	3,890
Provision for credit losses	1,325	(148)
Commercial Real Estate Portfolio Segment [Member]
Balance	68,366	61,081	61,081
(Reversal)/provision for credit losses on loans	3,463	2,702
Charge-offs	(3,990)	0	(2,091)
Recoveries	2,528	95
Net (charge-offs)/recoveries	(1,462)	95
Balance	70,367	63,878	68,366
Commercial Real Estate Portfolio Segment [Member] | Commitments to Extend Credit [Member]
Balance	0	0	0
Balance	85	0	0
Provision for credit losses	85	0
Residential Mortgage and Equity Lines Portfolio Segment [Member]
Balance	18,232	25,379	25,379
(Reversal)/provision for credit losses on loans	(611)	4,200
Charge-offs	0	0
Recoveries	12	51
Net (charge-offs)/recoveries	12	51
Balance	17,633	29,630	18,232
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Commitments to Extend Credit [Member]
Balance	0	0	0
Balance	0	0	0
Provision for credit losses	0	0
Installment and Other Loans [Member ]
Balance	35	1	1
(Reversal)/provision for credit losses on loans	(20)	103
Charge-offs	(6)	0	(177)
Recoveries	0	0
Net (charge-offs)/recoveries	(6)	0
Balance	9	104	35
Installment and Other Loans [Member ] | Commitments to Extend Credit [Member]
Balance	0	0	0
Balance	0	0	$ 0
Provision for credit losses	$ 0	$ 0