Note 9 - Loans - Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Balance	$ 144,884	$ 145,786	$ 146,485	$ 136,157	$ 136,157
Provision/(reversal) for expected credit losses	12,205	2,768	15,460	12,107
Charge-offs	(2,483)	(51)	(10,390)	(272)	(5,490)
Recoveries	503	269	3,554	780
Net (charge-offs)/recoveries	(1,980)	218	(6,836)	508
Balance	155,109	148,772	155,109	148,772	146,485
Commitments to Extend Credit [Member]
Balance	13,575	6,404	8,730	7,100	7,100
Provision/(reversal) for expected credit losses	(3,050)	(268)	1,795	(964)
Balance	10,525	6,136	10,525	6,136	8,730
Commercial Portfolio Segment [Member]
Balance	45,975	44,738	49,435	43,394	43,394
Provision/(reversal) for expected credit losses	6,514	4,208	6,454	5,414
Charge-offs	(2,352)	(50)	(6,263)	(271)	(3,222)
Recoveries	442	175	953	534
Net (charge-offs)/recoveries	(1,910)	125	(5,310)	263
Balance	50,579	49,071	50,579	49,071	49,435
Commercial Portfolio Segment [Member] | Commitments to Extend Credit [Member]
Balance	8,275	3,177	4,840	3,725	3,725
Provision/(reversal) for expected credit losses	(1,291)	(373)	2,144	(921)
Balance	6,984	2,804	6,984	2,804	4,840
Real Estate Construction Portfolio Segment [Member]
Balance	10,900	7,436	10,417	6,302	6,302
Provision/(reversal) for expected credit losses	1,851	(160)	2,334	968
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	6
Net (charge-offs)/recoveries	0	0	0	6
Balance	12,751	7,276	12,751	7,276	10,417
Real Estate Construction Portfolio Segment [Member] | Commitments to Extend Credit [Member]
Balance	5,215	3,227	3,890	3,375	3,375
Provision/(reversal) for expected credit losses	(1,674)	79	(349)	(69)
Balance	3,541	3,306	3,541	3,306	3,890
Commercial Real Estate Portfolio Segment [Member]
Balance	70,367	63,878	68,366	61,081	61,081
Provision/(reversal) for expected credit losses	3,249	4,634	6,712	7,336
Charge-offs	(130)	0	(4,120)	0	(2,091)
Recoveries	61	88	2,589	183
Net (charge-offs)/recoveries	(69)	88	(1,531)	183
Balance	73,547	68,600	73,547	68,600	68,366
Commercial Real Estate Portfolio Segment [Member] | Commitments to Extend Credit [Member]
Balance	85	0	0	0	0
Provision/(reversal) for expected credit losses	(85)	26	0	26
Balance	0	26	0	26	0
Residential Mortgage and Equity Lines Portfolio Segment [Member]
Balance	17,633	29,630	18,232	25,379	25,379
Provision/(reversal) for expected credit losses	581	(5,945)	(30)	(1,745)
Charge-offs	0	0	0	0
Recoveries	0	6	12	57
Net (charge-offs)/recoveries	0	6	12	57
Balance	18,214	23,691	18,214	23,691	18,232
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Commitments to Extend Credit [Member]
Balance	0	0	0	0	0
Provision/(reversal) for expected credit losses	0	0	0	0
Balance	0	0	0	0	0
Installment and Other Loans [Member ]
Balance	9	104	35	1	1
Provision/(reversal) for expected credit losses	10	31	(10)	134
Charge-offs	(1)	(1)	(7)	(1)	(177)
Recoveries	0	0	0	0
Net (charge-offs)/recoveries	(1)	(1)	(7)	(1)
Balance	18	134	18	134	35
Installment and Other Loans [Member ] | Commitments to Extend Credit [Member]
Balance	0	0	0	0	0
Provision/(reversal) for expected credit losses	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0	$ 0