Note 4 - Loans Receivable and Allowance for Credit Losses - Schedule of Portfolio Segments of Loans Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025	Mar. 31, 2025	Dec. 31, 2024
Loans, net of unearned income	$ 2,043,296	$ 2,035,227
Less: Allowance for credit losses	(34,921)	(34,649)	$ (33,091)	$ (32,573)
Total loan receivable, net of allowance for credit losses on loans	2,008,375	2,000,578
Commercial Portfolio Segment [Member]
Loans, net of unearned income	39,817	38,672
Less: Allowance for credit losses	(1,032)	(1,008)	(1,048)	(1,097)
Construction Portfolio Segment [Member]
Loans, net of unearned income	217,805	212,307
Less: Allowance for credit losses	(3,895)	(4,032)	(2,275)	(3,037)
Real Estate Portfolio Segment [Member] \| Mortgage on Commercial Property Occupied by Owner [Member]
Loans, net of unearned income	184,691	182,529
Less: Allowance for credit losses	(2,214)	(2,239)	(2,470)	(1,871)
Real Estate Portfolio Segment [Member] \| Mortgage on Commercial Property Occupied by Non Owners [Member]
Loans, net of unearned income	476,983	478,295
Less: Allowance for credit losses	(9,225)	(9,661)	(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	430,464	451,463
Real Estate Portfolio Segment [Member] \| Mortgage on Residential Properties Occupied by One to Four Family Investment [Member]
Loans, net of unearned income	479,098	494,228
Less: Allowance for credit losses	(8,127)	(7,601)	(8,855)	(8,832)
Real Estate Portfolio Segment [Member] \| Mortgage on Residential Properties Occupied by Multifamily [Member]
Loans, net of unearned income	210,577	173,611
Less: Allowance for credit losses	(2,441)	(1,845)	(2,202)	(2,203)
Consumer Portfolio Segment [Member]
Loans, net of unearned income	3,861	4,122
Less: Allowance for credit losses	$ (56)	$ (58)	$ (66)	$ (67)