Note 5 - Loans and the Allowance for Credit Losses - Activity in the ACL for Loans (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Balance	$ 81,974	$ 90,513	$ 90,513
Charge-offs	(3,185)	(4,484)	(17,049)
Recoveries	23	1
Provision for (reversal of) credit losses - loans	4,057	972
Balance	82,869	87,002	81,974
Commercial Portfolio Segment [Member]
Balance	20,632	28,903	28,903
Charge-offs	(300)	(2,767)	(14,888)
Recoveries	23	0
Provision for (reversal of) credit losses - loans	380	26
Balance	20,735	26,162	20,632
Commercial Real Estate Portfolio Segment [Member]
Balance	52,278	53,742	53,742
Charge-offs	(2,885)	(1,717)	(2,142)
Recoveries	0	0
Provision for (reversal of) credit losses - loans	3,401	975
Balance	52,794	53,000	52,278
Commercial Construction Portfolio Segment [Member]
Balance	4,739	3,718	3,718
Charge-offs	0	0	0
Recoveries	0	0
Provision for (reversal of) credit losses - loans	272	248
Balance	5,011	3,966	4,739
Residential Portfolio Segment [Member]
Balance	4,320	4,143	4,143
Charge-offs	0	0	(18)
Recoveries	0	1
Provision for (reversal of) credit losses - loans	6	(276)
Balance	4,326	3,868	4,320
Consumer Portfolio Segment [Member]
Balance	5	7	7
Charge-offs	0	0	(1)
Recoveries	0	0
Provision for (reversal of) credit losses - loans	(2)	(1)
Balance	$ 3	$ 6	$ 5