Note 4 - Loans, Allowance for Credit Losses and Other Real Estate Owned - Loans by Delinquency and Nonaccrual Status (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Total loans	$ 979,033	$ 1,068,126
Nonaccrual	197	692
Financial Asset, Not Past Due [Member]
Total loans	971,241	1,061,888
Financial Asset, 30 to 59 Days Past Due [Member]
Total loans	5,412	3,931
Financial Asset, 60 to 89 Days Past Due [Member]
Total loans	1,414	1,276
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total loans	769	339
Commercial Portfolio Segment [Member]
Total loans	180,416	233,090
Nonaccrual	50	0
Commercial Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Total loans	179,272	232,444
Commercial Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Total loans	1,041	383
Commercial Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Total loans	53	263
Commercial Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total loans	0	0
Commercial Real Estate Portfolio Segment [Member]
Total loans	492,749	535,261
Nonaccrual	56	290
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Total loans	491,955	534,748
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Total loans	367	223
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Total loans	371	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total loans	0	0
Construction Portfolio Segment [Member]
Total loans	2,635	48
Nonaccrual	0	0
Construction Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Total loans	2,635	48
Construction Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Total loans	0	0
Construction Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Total loans	0	0
Construction Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total loans	0	0
Residential Portfolio Segment [Member]
Total loans	14,719	18,133
Nonaccrual	29	137
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Total loans	14,425	17,855
Residential Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Total loans	265	141
Residential Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Total loans	0	0
Residential Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total loans	0	0
Consumer Portfolio Segment [Member]
Total loans	288,514	281,594
Nonaccrual	62	265
Consumer Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Total loans	282,954	276,793
Consumer Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Total loans	3,739	3,184
Consumer Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Total loans	990	1,013
Consumer Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total loans	$ 769	$ 339