Note 3 - Loans and Allowance for Credit Losses - Risk Category of Loans by Class (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Loans	$ 1,068,126	$ 1,256,243
Nonaccrual	692	4,329
Financial Asset, Not Past Due [Member]
Loans	1,061,888	1,247,222
Financial Asset, 30 to 59 Days Past Due [Member]
Loans	3,931	3,493
Financial Asset, 60 to 89 Days Past Due [Member]
Loans	1,276	749
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	339	450
Commercial Portfolio Segment [Member]
Originated prior	34,816
Originated 2017	3,999
Originated 2018	8,690
Originated 2019	16,919
Originated 2020	30,694
Originated 2021	98,856
Total Term Loans	193,974
Revolving Loans Amortized Cost Basis	39,116
Loans	233,090	394,806
Nonaccrual	0	83
Commercial Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Loans	232,444	394,004
Commercial Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	383	713
Commercial Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	263	6
Commercial Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	0	0
Commercial Real Estate Portfolio Segment [Member]
Originated prior	127,174
Originated 2017	87,921
Originated 2018	78,200
Originated 2019	80,663
Originated 2020	84,465
Originated 2021	76,838
Total Term Loans	535,261
Revolving Loans Amortized Cost Basis	0
Loans	535,261	564,300
Nonaccrual	290	3,720
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Loans	534,748	560,580
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	223	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	0	0
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	0	0
Construction Portfolio Segment [Member]
Originated prior	0
Originated 2017	0
Originated 2018	0
Originated 2019	0
Originated 2020	0
Originated 2021	0
Total Term Loans	0
Revolving Loans Amortized Cost Basis	48
Loans	48	129
Nonaccrual	0	0
Construction Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Loans	48	129
Construction Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	0	0
Construction Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	0	0
Construction Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	0	0
Residential Portfolio Segment [Member]
Originated prior	18,133
Originated 2017	0
Originated 2018	0
Originated 2019	0
Originated 2020	0
Originated 2021	0
Total Term Loans	18,133
Revolving Loans Amortized Cost Basis	0
Loans	18,133	23,471
Nonaccrual	137	161
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Loans	17,855	22,269
Residential Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	141	770
Residential Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	0	271
Residential Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	0	0
Consumer Portfolio Segment [Member]
Loans	281,594	273,537
Nonaccrual	265	365
Consumer Portfolio Segment [Member] | Financial Asset, Not Past Due [Member]
Loans	276,793	270,240
Consumer Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	3,184	2,010
Consumer Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	1,013	472
Consumer Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	339	450
Consumer Portfolio Segment [Member] | Term Loan Originated Prior [Member]
Loans	8,087
Nonaccrual	0
Consumer Portfolio Segment [Member] | Term Loan Originated Prior [Member] | Financial Asset, Not Past Due [Member]
Loans	7,884
Consumer Portfolio Segment [Member] | Term Loan Originated Prior [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	197
Consumer Portfolio Segment [Member] | Term Loan Originated Prior [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	5
Consumer Portfolio Segment [Member] | Term Loan Originated Prior [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	1
Consumer Portfolio Segment [Member] | Term Loans Originated in 2017 [Member]
Loans	10,338
Nonaccrual	0
Consumer Portfolio Segment [Member] | Term Loans Originated in 2017 [Member] | Financial Asset, Not Past Due [Member]
Loans	10,162
Consumer Portfolio Segment [Member] | Term Loans Originated in 2017 [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	139
Consumer Portfolio Segment [Member] | Term Loans Originated in 2017 [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	20
Consumer Portfolio Segment [Member] | Term Loans Originated in 2017 [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	17
Consumer Portfolio Segment [Member] | Term Loans Originated in 2018 [Member]
Loans	26,803
Nonaccrual	0
Consumer Portfolio Segment [Member] | Term Loans Originated in 2018 [Member] | Financial Asset, Not Past Due [Member]
Loans	25,932
Consumer Portfolio Segment [Member] | Term Loans Originated in 2018 [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	634
Consumer Portfolio Segment [Member] | Term Loans Originated in 2018 [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	156
Consumer Portfolio Segment [Member] | Term Loans Originated in 2018 [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	81
Consumer Portfolio Segment [Member] | Term Loans Originated in 2019 [Member]
Loans	38,715
Nonaccrual	0
Consumer Portfolio Segment [Member] | Term Loans Originated in 2019 [Member] | Financial Asset, Not Past Due [Member]
Loans	37,999
Consumer Portfolio Segment [Member] | Term Loans Originated in 2019 [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	504
Consumer Portfolio Segment [Member] | Term Loans Originated in 2019 [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	150
Consumer Portfolio Segment [Member] | Term Loans Originated in 2019 [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	62
Consumer Portfolio Segment [Member] | Term Loans Originated in 2020 [Member]
Loans	59,135
Nonaccrual	0
Consumer Portfolio Segment [Member] | Term Loans Originated in 2020 [Member] | Financial Asset, Not Past Due [Member]
Loans	58,178
Consumer Portfolio Segment [Member] | Term Loans Originated in 2020 [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	662
Consumer Portfolio Segment [Member] | Term Loans Originated in 2020 [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	186
Consumer Portfolio Segment [Member] | Term Loans Originated in 2020 [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	109
Consumer Portfolio Segment [Member] | Term Loans Originated in 2021 [Member]
Loans	115,381
Nonaccrual	0
Consumer Portfolio Segment [Member] | Term Loans Originated in 2021 [Member] | Financial Asset, Not Past Due [Member]
Loans	113,899
Consumer Portfolio Segment [Member] | Term Loans Originated in 2021 [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	1,034
Consumer Portfolio Segment [Member] | Term Loans Originated in 2021 [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	408
Consumer Portfolio Segment [Member] | Term Loans Originated in 2021 [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	40
Consumer Portfolio Segment [Member] | Total Term Loans [Member]
Loans	258,459
Nonaccrual	0
Consumer Portfolio Segment [Member] | Total Term Loans [Member] | Financial Asset, Not Past Due [Member]
Loans	254,054
Consumer Portfolio Segment [Member] | Total Term Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	3,170
Consumer Portfolio Segment [Member] | Total Term Loans [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	925
Consumer Portfolio Segment [Member] | Total Term Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	310
Consumer Portfolio Segment [Member] | Revolving Loans Amortized Cost Basis [Member]
Loans	23,135
Nonaccrual	265
Consumer Portfolio Segment [Member] | Revolving Loans Amortized Cost Basis [Member] | Financial Asset, Not Past Due [Member]
Loans	22,739
Consumer Portfolio Segment [Member] | Revolving Loans Amortized Cost Basis [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Loans	14
Consumer Portfolio Segment [Member] | Revolving Loans Amortized Cost Basis [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Loans	88
Consumer Portfolio Segment [Member] | Revolving Loans Amortized Cost Basis [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	29
Pass [Member]
Loans	1,049,854	1,224,701
Pass [Member] | Commercial Portfolio Segment [Member]
Originated prior	34,784
Originated 2017	3,999
Originated 2018	8,690
Originated 2019	16,919
Originated 2020	30,694
Originated 2021	98,799
Total Term Loans	193,885
Revolving Loans Amortized Cost Basis	38,825
Loans	232,710	386,144
Pass [Member] | Commercial Real Estate Portfolio Segment [Member]
Originated prior	116,181
Originated 2017	87,921
Originated 2018	78,200
Originated 2019	78,647
Originated 2020	83,642
Originated 2021	76,709
Total Term Loans	521,300
Revolving Loans Amortized Cost Basis	0
Loans	521,300	545,398
Pass [Member] | Construction Portfolio Segment [Member]
Originated prior	0
Originated 2017	0
Originated 2018	0
Originated 2019	0
Originated 2020	0
Originated 2021	0
Total Term Loans	0
Revolving Loans Amortized Cost Basis	48
Loans	48	129
Pass [Member] | Residential Portfolio Segment [Member]
Originated prior	16,874
Originated 2017	0
Originated 2018	0
Originated 2019	0
Originated 2020	0
Originated 2021	0
Total Term Loans	16,874
Revolving Loans Amortized Cost Basis	0
Loans	16,874	22,105
Pass [Member] | Consumer Portfolio Segment [Member]
Loans	278,922	270,925
Substandard [Member]
Loans	16,807	30,428
Substandard [Member] | Commercial Portfolio Segment [Member]
Originated prior	32
Originated 2017	0
Originated 2018	0
Originated 2019	0
Originated 2020	0
Originated 2021	57
Total Term Loans	89
Revolving Loans Amortized Cost Basis	291
Loans	380	8,662
Substandard [Member] | Commercial Real Estate Portfolio Segment [Member]
Originated prior	10,993
Originated 2017	0
Originated 2018	0
Originated 2019	2,016
Originated 2020	823
Originated 2021	129
Total Term Loans	13,961
Revolving Loans Amortized Cost Basis	0
Loans	13,961	18,902
Substandard [Member] | Construction Portfolio Segment [Member]
Originated prior	0
Originated 2017	0
Originated 2018	0
Originated 2019	0
Originated 2020	0
Originated 2021	0
Total Term Loans	0
Revolving Loans Amortized Cost Basis	0
Loans	0	0
Substandard [Member] | Residential Portfolio Segment [Member]
Originated prior	1,259
Originated 2017	0
Originated 2018	0
Originated 2019	0
Originated 2020	0
Originated 2021	0
Total Term Loans	1,259
Revolving Loans Amortized Cost Basis	0
Loans	1,259	1,366
Substandard [Member] | Consumer Portfolio Segment [Member]
Loans	1,207	1,498
Doubtful [Member]
Loans	931	543
Doubtful [Member] | Commercial Portfolio Segment [Member]
Originated prior	0
Originated 2017	0
Originated 2018	0
Originated 2019	0
Originated 2020	0
Originated 2021	0
Total Term Loans	0
Revolving Loans Amortized Cost Basis	0
Loans	0	0
Doubtful [Member] | Commercial Real Estate Portfolio Segment [Member]
Originated prior	0
Originated 2017	0
Originated 2018	0
Originated 2019	0
Originated 2020	0
Originated 2021	0
Total Term Loans	0
Revolving Loans Amortized Cost Basis	0
Loans	0	0
Doubtful [Member] | Construction Portfolio Segment [Member]
Originated prior	0
Originated 2017	0
Originated 2018	0
Originated 2019	0
Originated 2020	0
Originated 2021	0
Total Term Loans	0
Revolving Loans Amortized Cost Basis	0
Loans	0	0
Doubtful [Member] | Residential Portfolio Segment [Member]
Originated prior	0
Originated 2017	0
Originated 2018	0
Originated 2019	0
Originated 2020	0
Originated 2021	0
Total Term Loans	0
Revolving Loans Amortized Cost Basis	0
Loans	0	0
Doubtful [Member] | Consumer Portfolio Segment [Member]
Loans	931	543
Unlikely to be Collected Financing Receivable [Member]
Loans	534	571
Unlikely to be Collected Financing Receivable [Member] | Commercial Portfolio Segment [Member]
Originated prior	0
Originated 2017	0
Originated 2018	0
Originated 2019	0
Originated 2020	0
Originated 2021	0
Total Term Loans	0
Revolving Loans Amortized Cost Basis	0
Loans	0	0
Unlikely to be Collected Financing Receivable [Member] | Commercial Real Estate Portfolio Segment [Member]
Originated prior	0
Originated 2017	0
Originated 2018	0
Originated 2019	0
Originated 2020	0
Originated 2021	0
Total Term Loans	0
Revolving Loans Amortized Cost Basis	0
Loans	0	0
Unlikely to be Collected Financing Receivable [Member] | Construction Portfolio Segment [Member]
Originated prior	0
Originated 2017	0
Originated 2018	0
Originated 2019	0
Originated 2020	0
Originated 2021	0
Total Term Loans	0
Revolving Loans Amortized Cost Basis	0
Loans	0	0
Unlikely to be Collected Financing Receivable [Member] | Residential Portfolio Segment [Member]
Originated prior	0
Originated 2017	0
Originated 2018	0
Originated 2019	0
Originated 2020	0
Originated 2021	0
Total Term Loans	0
Revolving Loans Amortized Cost Basis	0
Loans	0	0
Unlikely to be Collected Financing Receivable [Member] | Consumer Portfolio Segment [Member]
Loans	$ 534	$ 571