Note 5 - Loans and the Allowance for Credit Losses - Activity in the ACL for Loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Provision for (reversal of) credit losses - loans	$ 972	$ 1,539
Commercial Portfolio Segment [Member]
Balance	28,903	25,969
Charge-offs	(2,767)	(49)
Recoveries	0	1
Provision for (reversal of) credit losses - loans	26	(462)
Balance	26,162	25,459
Commercial Real Estate Portfolio Segment [Member]
Balance	53,742	45,589
Charge-offs	(1,717)	(225)
Recoveries	0	0
Provision for (reversal of) credit losses - loans	975	2,504
Balance	53,000	47,868
Commercial Construction Portfolio Segment [Member]
Balance	3,718	3,580
Charge-offs	0	0
Recoveries	0	0
Provision for (reversal of) credit losses - loans	248	(299)
Balance	3,966	3,281
Residential Portfolio Segment [Member]
Balance	4,143	3,628
Charge-offs	0	0
Recoveries	1	31
Provision for (reversal of) credit losses - loans	(276)	(204)
Balance	3,868	3,455
Consumer Portfolio Segment [Member]
Balance	7	7
Charge-offs	0	0
Recoveries	0	0
Provision for (reversal of) credit losses - loans	(1)	0
Balance	6	7
Unallocated Financing Receivables [Member]
Balance	90,513	78,773
Charge-offs	(4,484)	(274)
Recoveries	1	32
Provision for (reversal of) credit losses - loans	972	1,539
Balance	$ 87,002	$ 80,070