Note 3 - Loans and Allowance for Credit Losses - Credit Risk Profile by Internally Assigned Grade (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Loans	$ 1,068,126	$ 1,256,243
Pass [Member]
Loans	1,049,854	1,224,701
Substandard [Member]
Loans	16,807	30,428
Doubtful [Member]
Loans	931	543
Unlikely to be Collected Financing Receivable [Member]
Loans	534	571
Commercial Portfolio Segment [Member]
Loans	233,090	394,806
Commercial Portfolio Segment [Member] | Pass [Member]
Loans	232,710	386,144
Commercial Portfolio Segment [Member] | Substandard [Member]
Loans	380	8,662
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	535,261	564,300
Commercial Real Estate Portfolio Segment [Member] | Pass [Member]
Loans	521,300	545,398
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]
Loans	13,961	18,902
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	48	129
Construction Portfolio Segment [Member] | Pass [Member]
Loans	48	129
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	18,133	23,471
Residential Portfolio Segment [Member] | Pass [Member]
Loans	16,874	22,105
Residential Portfolio Segment [Member] | Substandard [Member]
Loans	1,259	1,366
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	281,594	273,537
Consumer Portfolio Segment [Member] | Pass [Member]
Loans	278,922	270,925
Consumer Portfolio Segment [Member] | Substandard [Member]
Loans	1,207	1,498
Consumer Portfolio Segment [Member] | Doubtful [Member]
Loans	931	543
Consumer Portfolio Segment [Member] | Unlikely to be Collected Financing Receivable [Member]
Loans	$ 534	$ 571