Note 4 - Loans and Allowance for Credit Losses - Major Categories of Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024		Sep. 30, 2024	Dec. 31, 2023
Loans	$ 627,764	$ 587,962
Loans	627,764	587,962
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	4,257	4,260		$ 4,191	$ 4,284
Deferred origination fees net of costs	1,050	709
Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss	622,457	582,993	[1]
Commercial Real Estate Portfolio Segment [Member]
Loans	430,518	398,126
Loans	430,518	398,126
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	2,283	2,481		2,436	2,448
Construction and Land Development [Member]
Loans	34,217	27,357
Loans	34,217	27,357
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	520	478		415	253
Residential Portfolio Segment [Member]
Loans	111,032	111,898
Loans	111,032	111,898
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	642	751		777	1,013
Commercial Portfolio Segment [Member]
Loans	51,864	50,405
Loans	51,864	50,405
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	762	513		541	494
Consumer Portfolio Segment [Member]
Loans	133	176
Loans	133	176
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	$ 1	$ 4		$ 2	$ 2

[1] Derived from audited consolidated financial statements