Note 4 - Allowance for Credit Losses- Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025	Mar. 31, 2025
Loans	$ 1,464,406	$ 1,449,745	$ 1,449,950
Real Estate 1 [Member] \| Construction and Land Development [Member]
Loans	97,487	88,424	81,596
Real Estate 1 [Member] \| Secured by Multi-family Residential Properties [Member]
Loans	520,821	527,283	$ 549,502
Real Estate [Member] \| Real Estate 1 [Member]
Loans	259	650
Real Estate [Member] \| Real Estate 1 [Member] \| Construction and Land Development [Member]
Loans	18	18
Real Estate [Member] \| Real Estate 1 [Member] \| Secured by Multi-family Residential Properties [Member]
Loans	241	632
Non Real Estate [Member] \| Real Estate 1 [Member]
Loans	0	0
Non Real Estate [Member] \| Real Estate 1 [Member] \| Construction and Land Development [Member]
Loans	0	0
Non Real Estate [Member] \| Real Estate 1 [Member] \| Secured by Multi-family Residential Properties [Member]
Loans	0	0
Collateral Pledged [Member] \| Real Estate 1 [Member]
Loans	259	650
Collateral Pledged [Member] \| Real Estate 1 [Member] \| Construction and Land Development [Member]
Loans	18	18
Collateral Pledged [Member] \| Real Estate 1 [Member] \| Secured by Multi-family Residential Properties [Member]
Loans	$ 241	$ 632