Note 3 - Loans - Schedule of Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Mar. 31, 2026	Dec. 31, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024
Total outstanding loans	$ 2,224,119		$ 2,148,439
Allowance for credit losses on loans	(21,501)	$ (20,938)	(22,261)	$ (19,624)	$ (18,722)	$ (18,679)
Total loans, net of allowance for credit losses on loans	2,202,618		2,126,178
Commercial and Industrial Portfolio Segment [Member]
Total outstanding loans	1,111,610		1,049,530
Allowance for credit losses on loans	(14,596)	(13,856)	(15,612)	(12,058)	(10,989)	(10,170)
Construction Portfolio Segment [Member]
Total outstanding loans	164,200		196,243
Allowance for credit losses on loans	(1,560)	(2,233)	(1,972)	(2,534)	(2,822)	(3,005)
Residential Portfolio Segment [Member]
Total outstanding loans	38,007		45,669
Allowance for credit losses on loans	(437)	(530)	(494)	(353)	(367)	(286)
Commercial Real Estate Portfolio Segment [Member]
Total outstanding loans	909,932		854,342
Allowance for credit losses on loans	(4,906)	(4,317)	(4,150)	(4,654)	(4,523)	(5,207)
Consumer Portfolio Segment [Member]
Total outstanding loans	370		2,655
Allowance for credit losses on loans	$ (2)	$ (2)	$ (33)	$ (25)	$ (21)	$ (11)