Note 4 - Loans, Allowance for Credit Losses and Other Real Estate Owned - Credit Risk Profile by Internally Assigned Grade (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Loans	$ 696,204	$ 726,482
Commercial Portfolio Segment [Member]
Loans	108,476	117,009
Commercial Real Estate Portfolio Segment [Member]
Loans	471,961	482,230
Construction Portfolio Segment [Member]
Loans	0	0
Residential Portfolio Segment [Member]
Loans	6,601	7,186
Consumer Portfolio Segment [Member]
Loans	109,166	120,057
Pass [Member]
Loans	684,766	714,020
Pass [Member] \| Commercial Portfolio Segment [Member]
Loans	106,835	114,861
Pass [Member] \| Commercial Real Estate Portfolio Segment [Member]
Loans	464,136	474,140
Pass [Member] \| Construction Portfolio Segment [Member]
Loans	0	0
Pass [Member] \| Residential Portfolio Segment [Member]
Loans	6,401	6,983
Pass [Member] \| Consumer Portfolio Segment [Member]
Loans	107,394	118,036
Substandard [Member]
Loans	10,343	10,992
Substandard [Member] \| Commercial Portfolio Segment [Member]
Loans	955	1,053
Substandard [Member] \| Commercial Real Estate Portfolio Segment [Member]
Loans	7,825	8,090
Substandard [Member] \| Construction Portfolio Segment [Member]
Loans	0	0
Substandard [Member] \| Residential Portfolio Segment [Member]
Loans	200	203
Substandard [Member] \| Consumer Portfolio Segment [Member]
Loans	1,363	1,646
Doubtful [Member]
Loans	734	1,152
Doubtful [Member] \| Commercial Portfolio Segment [Member]
Loans	686	1,095
Doubtful [Member] \| Commercial Real Estate Portfolio Segment [Member]
Loans	0	0
Doubtful [Member] \| Construction Portfolio Segment [Member]
Loans	0	0
Doubtful [Member] \| Residential Portfolio Segment [Member]
Loans	0	0
Doubtful [Member] \| Consumer Portfolio Segment [Member]
Loans	48	57
Unlikely to be Collected Financing Receivable [Member]
Loans	361	318
Unlikely to be Collected Financing Receivable [Member] \| Commercial Portfolio Segment [Member]
Loans	0	0
Unlikely to be Collected Financing Receivable [Member] \| Commercial Real Estate Portfolio Segment [Member]
Loans	0	0
Unlikely to be Collected Financing Receivable [Member] \| Construction Portfolio Segment [Member]
Loans	0	0
Unlikely to be Collected Financing Receivable [Member] \| Residential Portfolio Segment [Member]
Loans	0	0
Unlikely to be Collected Financing Receivable [Member] \| Consumer Portfolio Segment [Member]
Loans	$ 361	$ 318