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
	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Balance				$ 81,974				$ 90,513	$ 81,974	$ 90,513	$ 78,773
Charge-offs									(13,702)	(17,049)	(5,443)
Recoveries									429	86	117
Provision for credit losses	$ 3,500	$ 3,800	$ 2,500	4,000	$ 2,700	$ 1,500	$ 3,000	1,000	13,984	8,424	17,066
Balance	82,685				81,974				82,685	81,974	90,513
Commercial Portfolio Segment [Member]
Balance				20,632				28,903	20,632	28,903	25,969
Charge-offs									(3,286)	(14,888)	(2,612)
Recoveries									392	10	54
Provision for credit losses									540	6,607	5,492
Balance	18,278				20,632				18,278	20,632	28,903
Commercial Real Estate Portfolio Segment [Member]
Balance				52,278				53,742	52,278	53,742	45,589
Charge-offs									(10,416)	(2,142)	(2,819)
Recoveries									31	0	0
Provision for credit losses									12,884	678	10,972
Balance	54,777				52,278				54,777	52,278	53,742
Commercial Construction Portfolio Segment [Member]
Balance				4,739				3,718	4,739	3,718	3,580
Charge-offs									0	0	0
Recoveries									0	0	0
Provision for credit losses									325	1,021	138
Balance	5,064				4,739				5,064	4,739	3,718
Residential Portfolio Segment [Member]
Balance				4,320				4,143	4,320	4,143	3,628
Charge-offs									0	(18)	(9)
Recoveries									6	68	63
Provision for credit losses									235	127	461
Balance	4,561				4,320				4,561	4,320	4,143
Consumer Portfolio Segment [Member]
Balance				$ 5				$ 7	5	7	7
Charge-offs									0	(1)	(3)
Recoveries									0	8	0
Provision for credit losses									0	(9)	3
Balance	$ 5				$ 5				$ 5	$ 5	$ 7