Note 17 - Regulatory Capital - Capital Amounts and Ratios (Details) $ in Thousands		Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Common equity tier 1 capital, actual amount		$ 100,250	$ 97,710
Common equity tier 1 capital, actual percent of asset	[1]	0.1148	0.1318
Common equity tier 1 capital, amount required to be adequately capitalized		$ 39,312	$ 33,368
Common equity tier 1 capital, percent of assets required to be adequately capitalized	[1]	0.0450	0.0450
Common equity tier 1 capital, excess capital amount		$ 60,938	$ 64,342
Common equity tier 1 capital, excess capital percent of assets	[1]	0.0698	0.0868
Common equity tier 1 capital, amount to be well capitalized under prompt corrective action provisions		$ 56,784	$ 48,199
Common equity tier 1 capital, percent of assets to be well capitalized under prompt corrective action provisions	[1]	0.0650	0.0650
Tier 1 leverage, actual amount		$ 100,250	$ 97,710
Tier 1 leverage, actual percent of asset	[1]	0.0914	0.0947
Tier 1 leverage, amount required to be adequately capitalized		$ 43,883	$ 41,283
Tier 1 leverage, percent of assets required to be adequately capitalized	[1]	0.0400	0.0400
Tier 1 leverage, excess capital amount		$ 56,367	$ 56,427
Tier 1 leverage, excess capital percent of assets	[1]	0.0514	0.0547
Tier 1 leverage, amount to be well capitalized under prompt corrective action provisions		$ 54,854	$ 51,603
Tier 1 leverage, percent of assets to be well capitalized under prompt corrective action provisions	[1]	0.0500	0.0500
Tier 1 risk-based capital, actual amount		$ 100,250	$ 97,710
Tier 1 risk-based capital, actual percent of asset	[1]	0.1148	0.1318
Tier 1 risk-based capital, amount required to be adequately capitalized		$ 52,416	$ 44,491
Tier 1 risk-based capital, percent of assets required to be adequately capitalized	[1]	0.0600	0.0600
Tier 1 risk-based capital, excess capital amount		$ 47,834	$ 53,219
Tier 1 risk-based capital, excess capital percent of assets	[1]	0.0548	0.0718
Tier 1 risk-based capital, amount to be well capitalized under prompt corrective action provisions		$ 69,888	$ 59,322
Tier 1 risk-based capital, percent of assets to be well capitalized under prompt corrective action provisions	[1]	0.0800	0.0800
Total risk-based capital, actual amount		$ 110,527	$ 106,979
Total risk-based capital, actual percent of asset	[1]	0.1265	0.1443
Total risk-based capital, amount required to be adequately capitalized		$ 69,888	$ 59,322
Total risk-based capital, percent of assets required to be adequately capitalized	[1]	0.0800	0.0800
Total risk-based capital, excess capital amount		$ 40,639	$ 47,657
Total risk-based capital, excess capital percent of assets	[1]	0.0465	0.0643
Total risk-based capital, amount to be well capitalized under prompt corrective action provisions		$ 87,360	$ 74,152
Total risk-based capital, percent of assets to be well capitalized under prompt corrective action provisions	[1]	0.1000	0.1000

[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.