Note 12 - Regulatory Matters - Schedule of Regulatory Capital Requirements (Details) $ in Thousands	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Tier 1 Risk-Based Core Capital (To Risk Weighted Assets)	$ 144,043	$ 141,452
Tier 1 Risk-Based Core Capital (To Risk Weighted Assets), Actual Ratio	0.177	0.178
Tier 1 Risk-Based Core Capital (To Risk Weighted Assets), Capital Adequacy	$ 48,774	$ 47,714
Tier 1 Risk-Based Core Capital (To Risk Weighted Assets) Capital Adequacy Ratio	0.060	0.060
Tier 1 Risk-Based Core Capital (To Risk Weighted Assets), Well Capitalized	$ 65,032	$ 63,619
Tier 1 Risk-Based Core Capital (To Risk Weighted Assets) Well Capitalized Ratio	0.080	0.080
Total Risk-Based Capital (To Risk Weighted Assets)	$ 154,244	$ 151,408
Total Risk-Based Capital (To Risk Weighted Assets) Actual Ratio	0.190	0.190
Total Risk-Based Capital (To Risk Weighted Assets), Capital Adequacy	$ 65,032	$ 63,619
Total Risk-Based Capital (To Risk Weighted Assets) Capital Adequacy Ratio	0.080	0.080
Total Risk-Based Capital (To Risk Weighted Assets), Well Capitalized	$ 81,291	$ 79,523
Total Risk-Based Capital (To Risk Weighted Assets) Well Capitalized Ratio	0.100	0.100
Common Equity Tier 1 Capital (To Risk Weighted Assets)	$ 144,043	$ 141,452
Common Equity Tier 1 Capital (To Risk Weighted Assets) Actual Ratio	0.177	0.178
Common Equity Tier 1 Capital (To Risk Weighted Assets), Capital Adequacy	$ 36,581	$ 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	$ 52,839	$ 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)	$ 144,043	$ 141,452
Tier 1 Leverage (Core) Capital (To Adjusted Tangible Assets) Actual Ratio	0.101	0.104
Tier 1 Leverage (Core) Capital (To Adjusted Tangible Assets), Capital Adequacy	$ 56,851	$ 54,372
Tier 1 Leverage (Core) Capital (To Adjusted Tangible Assets) Capital Adequacy Ratio	0.040	0.040
Tier 1 Leverage (Core) Capital (To Adjusted Tangible Assets), Well Capitalized	$ 71,063	$ 67,965
Tier 1 Leverage (Core) Capital (To Adjusted Tangible Assets) Well Capitalized Ratio	0.050	0.050