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, 2023	Dec. 31, 2022
Loans	$ 885,850	$ 958,488
Pass [Member]
Loans	863,149	941,650
Substandard [Member]
Loans	20,129	15,298
Doubtful [Member]
Loans	1,422	752
Unlikely to be Collected Financing Receivable [Member]
Loans	1,150	788
Commercial Portfolio Segment [Member]
Loans	135,575	169,617
Commercial Portfolio Segment [Member] | Pass [Member]
Loans	128,392	169,040
Commercial Portfolio Segment [Member] | Substandard [Member]
Loans	7,183	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	494,282	491,107
Commercial Real Estate Portfolio Segment [Member] | Pass [Member]
Loans	482,539	477,842
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]
Loans	11,743	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	5,043	3,088
Construction Portfolio Segment [Member] | Pass [Member]
Loans	5,043	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	11,283	13,834
Residential Portfolio Segment [Member] | Pass [Member]
Loans	10,943	13,457
Residential Portfolio Segment [Member] | Substandard [Member]
Loans	340	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	239,667	280,842
Consumer Portfolio Segment [Member] | Pass [Member]
Loans	236,232	278,223
Consumer Portfolio Segment [Member] | Substandard [Member]
Loans	863	1,079
Consumer Portfolio Segment [Member] | Doubtful [Member]
Loans	1,422	752
Consumer Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member]
Loans	$ 1,150	$ 788