Note 3 - Loans - Summary of Loan Classes and an Aging of Past Due Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025	Mar. 31, 2025
Loans	$ 1,464,406	$ 1,449,745	$ 1,449,950
Non-accrual loans	4,445	4,654
Accruing loans past due 90 days or more amounted	0	0
Commercial and Industrial Loans [Member]
Loans	115,202	117,944	132,396
Non-accrual loans	2,290	2,615
Accruing loans past due 90 days or more amounted	0	0
Consumer and Other Loans [Member]
Loans	18,329	19,116	20,774
Non-accrual loans	0	0
Accruing loans past due 90 days or more amounted	0	0
Financial Asset, 30 to 59 Days Past Due [Member]
Loans	3,881	2,722
Financial Asset, 30 to 59 Days Past Due [Member] \| Commercial and Industrial Loans [Member]
Loans	411	646
Financial Asset, 30 to 59 Days Past Due [Member] \| Consumer and Other Loans [Member]
Loans	46	12
Financial Asset, 60 to 89 Days Past Due [Member]
Loans	1,498	1,400
Financial Asset, 60 to 89 Days Past Due [Member] \| Commercial and Industrial Loans [Member]
Loans	498	520
Financial Asset, 60 to 89 Days Past Due [Member] \| Consumer and Other Loans [Member]
Loans	29	23
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	2,639	2,308
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] \| Commercial and Industrial Loans [Member]
Loans	1,517	1,324
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] \| Consumer and Other Loans [Member]
Loans	0	0
Financial Asset, Past Due [Member]
Loans	8,018	6,430
Financial Asset, Past Due [Member] \| Commercial and Industrial Loans [Member]
Loans	2,426	2,490
Financial Asset, Past Due [Member] \| Consumer and Other Loans [Member]
Loans	75	35
Financial Asset, Not Past Due [Member]
Loans	1,456,388	1,443,315
Financial Asset, Not Past Due [Member] \| Commercial and Industrial Loans [Member]
Loans	112,776	115,454
Financial Asset, Not Past Due [Member] \| Consumer and Other Loans [Member]
Loans	18,254	19,081
Construction and Land Development [Member] \| Real Estate 1 [Member]
Loans	97,487	88,424	81,596
Non-accrual loans	44	45
Accruing loans past due 90 days or more amounted	0	0
Construction and Land Development [Member] \| Financial Asset, 30 to 59 Days Past Due [Member] \| Real Estate 1 [Member]
Loans	20	30
Construction and Land Development [Member] \| Financial Asset, 60 to 89 Days Past Due [Member] \| Real Estate 1 [Member]
Loans	26	0
Construction and Land Development [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member] \| Real Estate 1 [Member]
Loans	18	45
Construction and Land Development [Member] \| Financial Asset, Past Due [Member] \| Real Estate 1 [Member]
Loans	64	75
Construction and Land Development [Member] \| Financial Asset, Not Past Due [Member] \| Real Estate 1 [Member]
Loans	97,423	88,349
Secured by Multi-family Residential Properties [Member] \| Real Estate 1 [Member]
Loans	520,821	527,283	549,502
Non-accrual loans	2,111	1,994
Accruing loans past due 90 days or more amounted	0	0
Secured by Multi-family Residential Properties [Member] \| Financial Asset, 30 to 59 Days Past Due [Member] \| Real Estate 1 [Member]
Loans	3,163	2,034
Secured by Multi-family Residential Properties [Member] \| Financial Asset, 60 to 89 Days Past Due [Member] \| Real Estate 1 [Member]
Loans	765	857
Secured by Multi-family Residential Properties [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member] \| Real Estate 1 [Member]
Loans	1,104	939
Secured by Multi-family Residential Properties [Member] \| Financial Asset, Past Due [Member] \| Real Estate 1 [Member]
Loans	5,032	3,830
Secured by Multi-family Residential Properties [Member] \| Financial Asset, Not Past Due [Member] \| Real Estate 1 [Member]
Loans	515,789	523,453
Other Real Estate Loans [Member] \| Real Estate 1 [Member]
Loans	712,567	696,978	$ 665,682
Non-accrual loans	0	0
Accruing loans past due 90 days or more amounted	0	0
Other Real Estate Loans [Member] \| Financial Asset, 30 to 59 Days Past Due [Member] \| Real Estate 1 [Member]
Loans	241	0
Other Real Estate Loans [Member] \| Financial Asset, 60 to 89 Days Past Due [Member] \| Real Estate 1 [Member]
Loans	180	0
Other Real Estate Loans [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due [Member] \| Real Estate 1 [Member]
Loans	0	0
Other Real Estate Loans [Member] \| Financial Asset, Past Due [Member] \| Real Estate 1 [Member]
Loans	421	0
Other Real Estate Loans [Member] \| Financial Asset, Not Past Due [Member] \| Real Estate 1 [Member]
Loans	$ 712,146	$ 696,978