Note 3 - Loans and Allowance for Credit Losses - Credit Risk Profile by Internally Assigned Grade (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Loans	$ 866,602	$ 958,488
Pass [Member]
Loans	845,629	941,650
Substandard [Member]
Loans	18,908	15,298
Doubtful [Member]
Loans	1,479	752
Unlikely to be Collected Financing Receivable [Member]
Loans	586	788
Commercial Portfolio Segment [Member]
Loans	136,550	169,617
Commercial Portfolio Segment [Member] | Pass [Member]
Loans	130,001	169,040
Commercial Portfolio Segment [Member] | Substandard [Member]
Loans	6,549	577
Commercial Portfolio Segment [Member] | Doubtful [Member]
Loans	0	0
Commercial Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member]
Loans	0	0
Commercial Real Estate Portfolio Segment [Member]
Loans	487,523	491,107
Commercial Real Estate Portfolio Segment [Member] | Pass [Member]
Loans	475,870	477,842
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]
Loans	11,653	13,265
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member]
Loans	0	0
Commercial Real Estate Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member]
Loans	0	0
Construction Portfolio Segment [Member]
Loans	5,063	3,088
Construction Portfolio Segment [Member] | Pass [Member]
Loans	5,063	3,088
Construction Portfolio Segment [Member] | Substandard [Member]
Loans	0	0
Construction Portfolio Segment [Member] | Doubtful [Member]
Loans	0	0
Construction Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member]
Loans	0	0
Residential Portfolio Segment [Member]
Loans	9,935	13,834
Residential Portfolio Segment [Member] | Pass [Member]
Loans	9,606	13,457
Residential Portfolio Segment [Member] | Substandard [Member]
Loans	329	377
Residential Portfolio Segment [Member] | Doubtful [Member]
Loans	0	0
Residential Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member]
Loans	0	0
Consumer Portfolio Segment [Member]
Loans	227,531	280,842
Consumer Portfolio Segment [Member] | Pass [Member]
Loans	225,089	278,223
Consumer Portfolio Segment [Member] | Substandard [Member]
Loans	377	1,079
Consumer Portfolio Segment [Member] | Doubtful [Member]
Loans	1,479	752
Consumer Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member]
Loans	$ 586	$ 788