Note 17 - Regulatory Capital - Capital Amounts and Ratios (Details) $ in Thousands		Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Common equity tier 1 capital, actual amount		$ 104,005	$ 100,250
Common equity tier 1 capital, actual percent of asset	[1]	0.1154	0.1148
Common equity tier 1 capital, amount required to be adequately capitalized		$ 40,542	$ 39,312
Common equity tier 1 capital, percent of assets required to be adequately capitalized	[1]	0.045	0.045
Common equity tier 1 capital, excess capital amount		$ 63,463	$ 60,938
Common equity tier 1 capital, excess capital percent of assets	[1]	0.0704	0.0698
Common equity tier 1 capital, amount to be well capitalized under prompt corrective action provisions		$ 58,560	$ 56,784
Common equity tier 1 capital, percent of assets to be well capitalized under prompt corrective action provisions	[1]	0.065	0.065
Tier 1 leverage, actual amount		$ 104,005	$ 100,250
Tier 1 leverage, actual percent of asset	[1]	0.0908	0.0914
Tier 1 leverage, amount required to be adequately capitalized		$ 45,823	$ 43,883
Tier 1 leverage, percent of assets required to be adequately capitalized	[1]	0.04	0.04
Tier 1 leverage, excess capital amount		$ 58,182	$ 56,367
Tier 1 leverage, excess capital percent of assets	[1]	0.0508	0.0514
Tier 1 leverage, amount to be well capitalized under prompt corrective action provisions		$ 57,279	$ 54,854
Tier 1 leverage, percent of assets to be well capitalized under prompt corrective action provisions	[1]	0.05	0.05
Tier 1 risk-based capital, actual amount		$ 104,005	$ 100,250
Tier 1 risk-based capital, actual percent of asset	[1]	0.1154	0.1148
Tier 1 risk-based capital, amount required to be adequately capitalized		$ 54,056	$ 52,416
Tier 1 risk-based capital, percent of assets required to be adequately capitalized	[1]	0.06	0.06
Tier 1 risk-based capital, excess capital amount		$ 49,949	$ 47,834
Tier 1 risk-based capital, excess capital percent of assets	[1]	0.0554	0.0548
Tier 1 risk-based capital, amount to be well capitalized under prompt corrective action provisions		$ 72,074	$ 69,888
Tier 1 risk-based capital, percent of assets to be well capitalized under prompt corrective action provisions	[1]	0.08	0.08
Total risk-based capital, actual amount		$ 115,274	$ 110,527
Total risk-based capital, actual percent of asset	[1]	0.128	0.1265
Total risk-based capital, amount required to be adequately capitalized		$ 72,074	$ 69,888
Total risk-based capital, percent of assets required to be adequately capitalized	[1]	0.08	0.08
Total risk-based capital, excess capital amount		$ 43,200	$ 40,639
Total risk-based capital, excess capital percent of assets	[1]	0.048	0.0465
Total risk-based capital, amount to be well capitalized under prompt corrective action provisions		$ 90,093	$ 87,360
Total risk-based capital, percent of assets to be well capitalized under prompt corrective action provisions	[1]	0.10	0.10

[1] Based upon the Bank’s adjusted total assets for the purpose of the Tier 1 leverage capital ratio and risk-weighted assets for the purpose of the risk-based capital ratios.