Note 12 - Regulatory Matters - Schedule of Regulatory Capital Requirements (Details) $ in Thousands	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Tier 1 Risk-Based Core Capital (To Risk Weighted Assets)	$ 151,693	$ 150,129
Tier 1 Risk-Based Core Capital (To Risk Weighted Assets), Actual Ratio	0.18	0.182
Tier 1 Risk-Based Core Capital (To Risk Weighted Assets), Capital Adequacy	$ 50,523	$ 49,391
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	$ 67,364	$ 65,854
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)	$ 162,258	$ 160,457
Total Risk-Based Capital (To Risk Weighted Assets) Actual Ratio	0.193	0.195
Total Risk-Based Capital (To Risk Weighted Assets), Capital Adequacy	$ 67,364	$ 65,854
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	$ 84,205	$ 82,318
Total Risk-Based Capital (To Risk Weighted Assets) Well Capitalized Ratio	0.10	0.10
Common Equity Tier 1 Capital (To Risk Weighted Assets)	$ 151,693	$ 150,129
Common Equity Tier 1 Capital (To Risk Weighted Assets) Actual Ratio	0.18	0.182
Common Equity Tier 1 Capital (To Risk Weighted Assets), Capital Adequacy	$ 37,892	$ 37,043
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	$ 54,734	$ 53,506
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)	$ 151,693	$ 150,129
Tier 1 Leverage (Core) Capital (To Adjusted Tangible Assets) Actual Ratio	0.099	0.098
Tier 1 Leverage (Core) Capital (To Adjusted Tangible Assets), Capital Adequacy	$ 61,213	$ 61,076
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	$ 76,517	$ 76,345
Tier 1 Leverage (Core) Capital (To Adjusted Tangible Assets) Well Capitalized Ratio	0.05	0.05