Note 4 - Loans, Allowance for Credit Losses and Other Real Estate Owned - Credit Risk Profile by Internally Assigned Grade (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Loans	$ 741,579	$ 820,300
Commercial Portfolio Segment [Member]
Loans	113,840	127,276
Commercial Real Estate Portfolio Segment [Member]
Loans	489,384	507,900
Construction Portfolio Segment [Member]
Loans	0	5,064
Residential Portfolio Segment [Member]
Loans	7,517	8,274
Consumer Portfolio Segment [Member]
Loans	130,838	171,786
Pass [Member]
Loans	728,110	789,715
Pass [Member] \| Commercial Portfolio Segment [Member]
Loans	111,268	122,958
Pass [Member] \| Commercial Real Estate Portfolio Segment [Member]
Loans	480,675	489,522
Pass [Member] \| Construction Portfolio Segment [Member]
Loans	0	0
Pass [Member] \| Residential Portfolio Segment [Member]
Loans	7,312	7,984
Pass [Member] \| Consumer Portfolio Segment [Member]
Loans	128,855	169,251
Substandard [Member]
Loans	11,597	29,867
Substandard [Member] \| Commercial Portfolio Segment [Member]
Loans	1,144	4,318
Substandard [Member] \| Commercial Real Estate Portfolio Segment [Member]
Loans	8,709	18,378
Substandard [Member] \| Construction Portfolio Segment [Member]
Loans	0	5,064
Substandard [Member] \| Residential Portfolio Segment [Member]
Loans	205	290
Substandard [Member] \| Consumer Portfolio Segment [Member]
Loans	1,539	1,817
Doubtful [Member]
Loans	1,492	192
Doubtful [Member] \| Commercial Portfolio Segment [Member]
Loans	1,428	0
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	64	192
Unlikely to be Collected Financing Receivable [Member]
Loans	380	526
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	$ 380	$ 526