Note 15 - Regulatory Matters - Compliance With Regulatory Capital Requirements Under Banking Regulations (Details) $ in Thousands	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Tier 1 common equity (to risk-weighted assets) Actual, Ratio	4.50%
Tier 1 capital (to risk-weighted assets)	0.06
Bank [Member]
Capital	$ 229,803	$ 205,726
Capital to Risk Weighted Assets	0.143	0.145
Capital Required for Capital Adequacy	$ 128,308	$ 113,406
Capital Required for Capital Adequacy to Risk Weighted Assets	0.080	0.080
Total capital (to risk-weighted assets), For capital adequacy purposes with capital conversion buffer, Amount	$ 168,405	$ 148,845
Total capital (to risk-weighted assets), For capital adequacy purposes with capital conversion buffer, Ratio	10.50%	10.50%
Well Capitalized	$ 160,385	$ 141,757
Total capital (to risk-weighted assets), To be well capitalized under prompt corrective action provisions, Ratio	0.100	0.100
Tier 1 common equity (to risk-weighted assets) Actual, Amount	$ 212,605	$ 190,039
Tier 1 common equity (to risk-weighted assets) Actual, Ratio	13.30%	13.40%
Tier 1 common equity (to risk-weighted assets), For capital adequacy purposes, Amount	$ 72,173	$ 63,791
Tier 1 common equity (to risk-weighted assets), For capital adequacy purposes, Ratio	4.50%	4.50%
Tier 1 common equity (to risk-weighted assets), For capital adequacy purposes with capital conversion buffer, Amount	$ 112,270	$ 99,230
Tier 1 common equity (to risk-weighted assets), For capital adequacy purposes with capital conversion buffer, Ratio	7.00%	7.00%
Tier 1 common equity (to risk-weighted assets), To be well capitalized under prompt corrective action provisions, Amount	$ 104,251	$ 92,142
Tier 1 common equity (to risk-weighted assets), To be well capitalized under prompt corrective action provisions, Ratio	6.50%	6.50%
Tier 1 capital (to risk-weighted assets), Actual, Amount	$ 212,605	$ 190,039
Tier 1 capital (to risk-weighted assets)	0.133	0.134
Tier 1 capital (to risk-weighted assets), For capital adequacy purposes, Amount	$ 96,231	$ 85,054
Tier 1 capital (to risk-weighted assets), For capital adequacy purposes, Ratio	0.060	0.060
Tier 1 capital (to risk-weighted assets), For capital adequacy purposes with capital conversion buffer, Amount	$ 136,328	$ 120,493
Tier 1 capital (to risk-weighted assets), For capital adequacy purposes with capital conversion buffer, Ratio	8.50%	8.50%
Tier 1 capital (to risk-weighted assets), To be well capitalized under prompt corrective action provisions, Amount	$ 128,308	$ 113,406
Tier 1 capital (to risk-weighted assets), To be well capitalized under prompt corrective action provisions, Ratio	0.080	0.080
Tier 1 capital (to average assets), Actual, Amount	$ 212,605	$ 190,039
Tier 1 capital (to average assets), Actual, Ratio	0.087	0.079
Tier 1 capital (to average assets), For capital adequacy purposes, Amount	$ 97,951	$ 95,680
Tier 1 capital (to average assets), For capital adequacy purposes, Ratio	0.040	0.040
Tier 1 capital (to average assets), For capital adequacy purposeswith capital conversion buffer, amount	$ 97,951	$ 95,680
Tier 1 capital (to average assets), For capital adequacy purposes with capital conversion buffer, Ratio	4.00%	4.00%
Tier 1 capital (to average assets), To be well capitalized under prompt corrective action provisions, Amount	$ 122,439	$ 119,600
Tier 1 capital (to average assets), To be well capitalized under prompt corrective action provisions, Ratio	0.050	0.050
Parent Company [Member]
Capital	$ 230,133	$ 205,667
Capital to Risk Weighted Assets	0.144	0.145
Capital Required for Capital Adequacy	$ 128,325	$ 113,421
Capital Required for Capital Adequacy to Risk Weighted Assets	0.080	0.080
Total capital (to risk-weighted assets), For capital adequacy purposes with capital conversion buffer, Amount	$ 168,427	$ 148,866
Total capital (to risk-weighted assets), For capital adequacy purposes with capital conversion buffer, Ratio	10.50%	10.50%
Tier 1 common equity (to risk-weighted assets) Actual, Amount	$ 212,935	$ 189,980
Tier 1 common equity (to risk-weighted assets) Actual, Ratio	13.30%	13.40%
Tier 1 common equity (to risk-weighted assets), For capital adequacy purposes, Amount	$ 72,183	$ 63,800
Tier 1 common equity (to risk-weighted assets), For capital adequacy purposes, Ratio	4.50%	4.50%
Tier 1 common equity (to risk-weighted assets), For capital adequacy purposes with capital conversion buffer, Amount	$ 112,285	$ 99,244
Tier 1 common equity (to risk-weighted assets), For capital adequacy purposes with capital conversion buffer, Ratio	7.00%	7.00%
Tier 1 capital (to risk-weighted assets), Actual, Amount	$ 212,935	$ 189,980
Tier 1 capital (to risk-weighted assets)	0.133	0.134
Tier 1 capital (to risk-weighted assets), For capital adequacy purposes, Amount	$ 96,244	$ 85,066
Tier 1 capital (to risk-weighted assets), For capital adequacy purposes, Ratio	0.060	0.060
Tier 1 capital (to risk-weighted assets), For capital adequacy purposes with capital conversion buffer, Amount	$ 136,346	$ 120,510
Tier 1 capital (to risk-weighted assets), For capital adequacy purposes with capital conversion buffer, Ratio	8.50%	8.50%
Tier 1 capital (to average assets), Actual, Amount	$ 212,935	$ 189,980
Tier 1 capital (to average assets), Actual, Ratio	0.087	0.079
Tier 1 capital (to average assets), For capital adequacy purposes, Amount	$ 97,960	$ 95,688
Tier 1 capital (to average assets), For capital adequacy purposes, Ratio	0.040	0.040
Tier 1 capital (to average assets), For capital adequacy purposeswith capital conversion buffer, amount	$ 97,960	$ 95,688
Tier 1 capital (to average assets), For capital adequacy purposes with capital conversion buffer, Ratio	4.00%	4.00%