Note 4 - Loans and Allowance for Credit Losses - Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Loans	$ 627,764	$ 587,962
Loans	627,764	587,962
Commercial Real Estate Portfolio Segment [Member]
Loans	430,518	398,126
Loans	430,518	398,126
Residential Portfolio Segment [Member]
Loans	111,032	111,898
Loans	111,032	111,898
Commercial Portfolio Segment [Member]
Loans	51,864	50,405
Loans	51,864	50,405
Collateral Pledged [Member]
Loans	0	2,710
Loans	0	2,710
Collateral Pledged [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans	0	2,440
Loans	0	2,440
Collateral Pledged [Member] | Residential Portfolio Segment [Member]
Loans	0	270
Loans	0	270
Collateral Pledged [Member] | Commercial Portfolio Segment [Member]
Loans	0	0
Loans	$ 0	$ 0