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Note 10 - Loans and Allowance for Credit Losses - Loan Distribution (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Jun. 30, 2026	Dec. 31, 2025	Sep. 30, 2025	Jun. 30, 2025	Dec. 31, 2024
Subtotal	$ 2,428,610		$ 2,546,880
Net deferred loan (fees)	(99)		(35)
Loans, amortized cost basis	2,428,511		2,546,845
Allowance for credit losses on loans	(21,650)	$ (23,600)	(21,480)	$ (25,180)	$ (21,680)	$ (24,830)
Net loans	2,406,861		2,525,365
Commercial Real Estate Portfolio Segment [Member]
Allowance for credit losses on loans	(17,314)	(16,220)	(16,650)	(16,793)	(17,335)	(17,143)
Consumer Portfolio Segment [Member]
Subtotal	2,408		2,756
Loans, amortized cost basis	2,451		2,810
Allowance for credit losses on loans	(137)	(108)	(112)	(113)	(108)	(372)
Real Estate Loan [Member]
Subtotal	1,887,203		1,834,291
Loans, amortized cost basis	1,886,092		1,833,125
Real Estate Loan [Member] \| Residential Portfolio Segment [Member]
Subtotal	341,057		358,454
Loans, amortized cost basis	342,062		359,514
Allowance for credit losses on loans	(1,121)	(1,320)	(1,411)	(1,400)	(1,694)	(1,808)
Real Estate Loan [Member] \| Commercial Real Estate Portfolio Segment [Member]
Subtotal	1,467,192		1,393,183
Loans, amortized cost basis	1,465,022		1,390,890
Real Estate Loan [Member] \| Other Construction/Land [Member]
Subtotal	15,970		14,497
Loans, amortized cost basis	15,891		14,414
Real Estate Loan [Member] \| Farmland [Member]
Subtotal	62,984		68,157
Loans, amortized cost basis	63,117		68,307
Other Commercial [Member]
Subtotal	178,673		191,500
Loans, amortized cost basis	179,642		192,577
Mortgage Warehouse Facilities [Member]
Subtotal	360,326		518,333
Loans, amortized cost basis	360,326		518,333
Allowance for credit losses on loans	$ (165)	$ (525)	$ (665)	$ (506)	$ (451)	$ (398)