Note 4 - Allowance for Credit Losses on Loans - Schedule of Collateralized Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Outstanding loans	$ 2,172,846	$ 2,148,439
Real Estate [Member]
Outstanding loans	16,323	19,414
Business Assets [Member]
Outstanding loans	0	0
Accounts Receivable [Member]
Outstanding loans	0	0
Equipment [Member]
Outstanding loans	0	0
Other Collateral Pledged [Member]
Outstanding loans	0	3,850
Collateral Pledged [Member]
Outstanding loans	16,323	23,264
Commercial and Industrial Portfolio Segment [Member]
Outstanding loans	1,040,684	1,049,530
Commercial and Industrial Portfolio Segment [Member] \| Real Estate [Member]
Outstanding loans	0	0
Commercial and Industrial Portfolio Segment [Member] \| Business Assets [Member]
Outstanding loans	0	0
Commercial and Industrial Portfolio Segment [Member] \| Accounts Receivable [Member]
Outstanding loans	0	0
Commercial and Industrial Portfolio Segment [Member] \| Equipment [Member]
Outstanding loans	0	0
Commercial and Industrial Portfolio Segment [Member] \| Other Collateral Pledged [Member]
Outstanding loans	0	3,850
Commercial and Industrial Portfolio Segment [Member] \| Collateral Pledged [Member]
Outstanding loans	0	3,850
Construction Portfolio Segment [Member]
Outstanding loans	200,272	196,243
Construction Portfolio Segment [Member] \| Real Estate [Member]
Outstanding loans	16,323	19,414
Construction Portfolio Segment [Member] \| Business Assets [Member]
Outstanding loans	0	0
Construction Portfolio Segment [Member] \| Accounts Receivable [Member]
Outstanding loans	0	0
Construction Portfolio Segment [Member] \| Equipment [Member]
Outstanding loans	0	0
Construction Portfolio Segment [Member] \| Other Collateral Pledged [Member]
Outstanding loans	0	0
Construction Portfolio Segment [Member] \| Collateral Pledged [Member]
Outstanding loans	16,323	19,414
Residential Portfolio Segment [Member]
Outstanding loans	48,726	45,669
Residential Portfolio Segment [Member] \| Real Estate [Member]
Outstanding loans	0	0
Residential Portfolio Segment [Member] \| Business Assets [Member]
Outstanding loans	0	0
Residential Portfolio Segment [Member] \| Accounts Receivable [Member]
Outstanding loans	0	0
Residential Portfolio Segment [Member] \| Equipment [Member]
Outstanding loans	0	0
Residential Portfolio Segment [Member] \| Other Collateral Pledged [Member]
Outstanding loans	0	0
Residential Portfolio Segment [Member] \| Collateral Pledged [Member]
Outstanding loans	0	0
Commercial Real Estate Portfolio Segment [Member]
Outstanding loans	882,751	854,342
Commercial Real Estate Portfolio Segment [Member] \| Real Estate [Member]
Outstanding loans	0	0
Commercial Real Estate Portfolio Segment [Member] \| Business Assets [Member]
Outstanding loans	0	0
Commercial Real Estate Portfolio Segment [Member] \| Accounts Receivable [Member]
Outstanding loans	0	0
Commercial Real Estate Portfolio Segment [Member] \| Equipment [Member]
Outstanding loans	0	0
Commercial Real Estate Portfolio Segment [Member] \| Other Collateral Pledged [Member]
Outstanding loans	0	0
Commercial Real Estate Portfolio Segment [Member] \| Collateral Pledged [Member]
Outstanding loans	0	0
Consumer Portfolio Segment [Member]
Outstanding loans	413	2,655
Consumer Portfolio Segment [Member] \| Real Estate [Member]
Outstanding loans	0	0
Consumer Portfolio Segment [Member] \| Business Assets [Member]
Outstanding loans	0	0
Consumer Portfolio Segment [Member] \| Accounts Receivable [Member]
Outstanding loans	0	0
Consumer Portfolio Segment [Member] \| Equipment [Member]
Outstanding loans	0	0
Consumer Portfolio Segment [Member] \| Other Collateral Pledged [Member]
Outstanding loans	0	0
Consumer Portfolio Segment [Member] \| Collateral Pledged [Member]
Outstanding loans	$ 0	$ 0

Note 4 - Allowance for Credit Losses on Loans - Schedule of Collateralized Loans (Details) - USD ($)
$ in Thousands

Mar. 31, 2026

Dec. 31, 2025

Outstanding loans

$ 2,172,846

$ 2,148,439

Real Estate [Member]

Outstanding loans

16,323

19,414

Business Assets [Member]

Outstanding loans