Note 15 - Regulatory Matters - Compliance With Regulatory Capital Requirements Under Banking Regulations (Details) $ in Thousands	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Tier 1 common equity (to risk-weighted assets) Actual, Ratio	4.50%
Tier 1 capital (to risk-weighted assets)	0.06
Bank [Member]
Capital	$ 244,562	$ 229,803
Capital to Risk Weighted Assets	0.146	0.143
Capital Required for Capital Adequacy	$ 134,238	$ 128,308
Capital Required for Capital Adequacy to Risk Weighted Assets	0.08	0.08
Total capital (to risk-weighted assets), For capital adequacy purposes with capital conversion buffer, Amount	$ 176,187	$ 168,405
Total capital (to risk-weighted assets), For capital adequacy purposes with capital conversion buffer, Ratio	10.50%	10.50%
Well Capitalized	$ 167,797	$ 160,385
Total capital (to risk-weighted assets), To be well capitalized under prompt corrective action provisions, Ratio	0.10	0.10
Tier 1 common equity (to risk-weighted assets) Actual, Amount	$ 223,576	$ 212,605
Tier 1 common equity (to risk-weighted assets) Actual, Ratio	13.30%	13.30%
Tier 1 common equity (to risk-weighted assets), For capital adequacy purposes, Amount	$ 75,509	$ 72,173
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	$ 117,458	$ 112,270
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	$ 109,068	$ 104,251
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	$ 223,576	$ 212,605
Tier 1 capital (to risk-weighted assets)	0.133	0.133
Tier 1 capital (to risk-weighted assets), For capital adequacy purposes, Amount	$ 100,678	$ 96,231
Tier 1 capital (to risk-weighted assets), For capital adequacy purposes, Ratio	0.06	0.06
Tier 1 capital (to risk-weighted assets), For capital adequacy purposes with capital conversion buffer, Amount	$ 142,628	$ 136,328
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	$ 134,268	$ 128,308
Tier 1 capital (to risk-weighted assets), To be well capitalized under prompt corrective action provisions, Ratio	0.08	0.08
Tier 1 capital (to average assets), Actual, Amount	$ 223,576	$ 212,605
Tier 1 capital (to average assets), Actual, Ratio	0.091	0.087
Tier 1 capital (to average assets), For capital adequacy purposes, Amount	$ 98,457	$ 97,951
Tier 1 capital (to average assets), For capital adequacy purposes, Ratio	0.04	0.04
Tier 1 capital (to average assets), For capital adequacy purposeswith capital conversion buffer, amount	$ 98,457	$ 97,951
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	$ 123,071	$ 122,439
Tier 1 capital (to average assets), To be well capitalized under prompt corrective action provisions, Ratio	0.05	0.05
Parent Company [Member]
Capital	$ 246,120	$ 230,133
Capital to Risk Weighted Assets	0.147	0.144
Capital Required for Capital Adequacy	$ 134,255	$ 128,325
Capital Required for Capital Adequacy to Risk Weighted Assets	0.08	0.08
Total capital (to risk-weighted assets), For capital adequacy purposes with capital conversion buffer, Amount	$ 176,209	$ 168,427
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	$ 225,135	$ 212,935
Tier 1 common equity (to risk-weighted assets) Actual, Ratio	13.40%	13.30%
Tier 1 common equity (to risk-weighted assets), For capital adequacy purposes, Amount	$ 75,518	$ 72,183
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	$ 117,473	$ 112,285
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	$ 225,135	$ 212,935
Tier 1 capital (to risk-weighted assets)	0.134	0.133
Tier 1 capital (to risk-weighted assets), For capital adequacy purposes, Amount	$ 100,691	$ 96,244
Tier 1 capital (to risk-weighted assets), For capital adequacy purposes, Ratio	0.06	0.06
Tier 1 capital (to risk-weighted assets), For capital adequacy purposes with capital conversion buffer, Amount	$ 142,646	$ 136,346
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	$ 225,135	$ 212,935
Tier 1 capital (to average assets), Actual, Ratio	0.092	0.087
Tier 1 capital (to average assets), For capital adequacy purposes, Amount	$ 98,465	$ 97,960
Tier 1 capital (to average assets), For capital adequacy purposes, Ratio	0.04	0.04
Tier 1 capital (to average assets), For capital adequacy purposeswith capital conversion buffer, amount	$ 98,465	$ 97,960
Tier 1 capital (to average assets), For capital adequacy purposes with capital conversion buffer, Ratio	4.00%	4.00%