Note 15 - Regulatory Matters - Schedule of Regulatory Capital Requirements (Details) $ in Thousands	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Tier 1 Risk-Based Core Capital (To Risk Weighted Assets)	$ 150,129	$ 141,452
Tier 1 Risk-Based Core Capital (To Risk Weighted Assets), Actual Ratio	0.182	0.178
Tier 1 Risk-Based Core Capital (To Risk Weighted Assets), Capital Adequacy	$ 49,391	$ 47,714
Tier 1 Risk-Based Core Capital (To Risk Weighted Assets) Capital Adequacy Ratio	0.06	0.06
Tier 1 Risk-Based Core Capital (To Risk Weighted Assets), Well Capitalized	$ 65,854	$ 63,619
Tier 1 Risk-Based Core Capital (To Risk Weighted Assets) Well Capitalized Ratio	0.08	0.08
Total Risk-Based Capital (To Risk Weighted Assets)	$ 160,457	$ 151,408
Total Risk-Based Capital (To Risk Weighted Assets) Actual Ratio	0.195	0.19
Total Risk-Based Capital (To Risk Weighted Assets), Capital Adequacy	$ 65,854	$ 63,619
Total Risk-Based Capital (To Risk Weighted Assets) Capital Adequacy Ratio	0.08	0.08
Total Risk-Based Capital (To Risk Weighted Assets), Well Capitalized	$ 82,318	$ 79,523
Total Risk-Based Capital (To Risk Weighted Assets) Well Capitalized Ratio	0.10	0.10
Common Equity Tier 1 Capital (To Risk Weighted Assets)	$ 150,129	$ 141,452
Common Equity Tier 1 Capital (To Risk Weighted Assets) Actual Ratio	0.182	0.178
Common Equity Tier 1 Capital (To Risk Weighted Assets), Capital Adequacy	$ 37,043	$ 35,785
Common Equity Tier 1 Capital (To Risk Weighted Assets) Capital Adequacy Ratio	0.045	0.045
Common Equity Tier 1 Capital (To Risk Weighted Assets), Well Capitalized	$ 53,506	$ 51,690
Common Equity Tier 1 Capital (To Risk Weighted Assets) Well Capitalized Ratio	0.065	0.065
Tier 1 Leverage (Core) Capital (To Adjusted Tangible Assets)	$ 150,129	$ 141,452
Tier 1 Leverage (Core) Capital (To Adjusted Tangible Assets) Actual Ratio	0.098	0.104
Tier 1 Leverage (Core) Capital (To Adjusted Tangible Assets), Capital Adequacy	$ 61,076	$ 54,372
Tier 1 Leverage (Core) Capital (To Adjusted Tangible Assets) Capital Adequacy Ratio	0.04	0.04
Tier 1 Leverage (Core) Capital (To Adjusted Tangible Assets), Well Capitalized	$ 76,345	$ 67,965
Tier 1 Leverage (Core) Capital (To Adjusted Tangible Assets) Well Capitalized Ratio	0.05	0.05