Note 3 - Loans and Allowance for Credit Losses - Loans by Delinquency and Nonaccrual Status (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Total loans	$ 1,068,126	$ 1,256,243
Nonaccrual	692	4,329
Financial Asset, Not Past Due [Member]
Total loans	1,061,888	1,247,222
Financial Asset, 30 to 59 Days Past Due [Member]
Total loans	3,931	3,493
Financial Asset, 60 to 89 Days Past Due [Member]
Total loans	1,276	749
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total loans	339	450
Commercial Portfolio Segment [Member]
Total loans	233,090	394,806
Nonaccrual	0	83
Commercial Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Total loans	232,444	394,004
Commercial Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Total loans	383	713
Commercial Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Total loans	263	6
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	535,261	564,300
Nonaccrual	290	3,720
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Total loans	534,748	560,580
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Total loans	223	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Total loans	0	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	48	129
Nonaccrual	0	0
Construction Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Total loans	48	129
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	18,133	23,471
Nonaccrual	137	161
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Total loans	17,855	22,269
Residential Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Total loans	141	770
Residential Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Total loans	0	271
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	281,594	273,537
Nonaccrual	265	365
Consumer Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Total loans	276,793	270,240
Consumer Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Total loans	3,184	2,010
Consumer Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Total loans	1,013	472
Consumer Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total loans	$ 339	$ 450