Note 4 - Loans Receivable and Allowance for Credit Losses - Schedule of Portfolio Segments of Loans Receivable (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Mar. 31, 2026	Dec. 31, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024
Loans, net of unearned income	$ 2,031,361		$ 2,035,227
Less: Allowance for credit losses	(34,624)	$ (34,921)	(34,649)	$ (33,770)	$ (33,091)	$ (32,573)
Total loan receivable, net of allowance for credit losses on loans	1,996,737		2,000,578
Commercial Portfolio Segment [Member]
Loans, net of unearned income	36,628		38,672
Less: Allowance for credit losses	(990)	(1,032)	(1,008)	(991)	(1,048)	(1,097)
Construction Portfolio Segment [Member]
Loans, net of unearned income	220,002		212,307
Less: Allowance for credit losses	(4,185)	(3,895)	(4,032)	(3,122)	(2,275)	(3,037)
Real Estate Portfolio Segment [Member] \| Mortgage on Commercial Property Occupied by Owner [Member]
Loans, net of unearned income	186,738		182,529
Less: Allowance for credit losses	(2,631)	(2,214)	(2,239)	(2,038)	(2,470)	(1,871)
Real Estate Portfolio Segment [Member] \| Mortgage on Commercial Property Occupied by Non Owners [Member]
Loans, net of unearned income	470,762		478,295
Less: Allowance for credit losses	(8,228)	(9,225)	(9,661)	(8,560)	(7,361)	(6,300)
Real Estate Portfolio Segment [Member] \| Mortgages on Residential Properties Occupied by One to Four Families [Member]
Loans, net of unearned income	427,955		451,463
Real Estate Portfolio Segment [Member] \| Mortgage on Residential Properties Occupied by One to Four Family Investment [Member]
Loans, net of unearned income	466,929		494,228
Less: Allowance for credit losses	(7,927)	(8,127)	(7,601)	(8,493)	(8,855)	(8,832)
Real Estate Portfolio Segment [Member] \| Mortgage on Residential Properties Occupied by Multifamily [Member]
Loans, net of unearned income	218,690		173,611
Less: Allowance for credit losses	(2,931)	(2,441)	(1,845)	(2,141)	(2,202)	(2,203)
Consumer Portfolio Segment [Member]
Loans, net of unearned income	3,657		4,122
Less: Allowance for credit losses	$ (56)	$ (56)	$ (58)	$ (54)	$ (66)	$ (67)