Note 13 - Regulatory Capital and Oversight - Capital Amounts and Ratios (Details) $ in Thousands	Sep. 30, 2023 USD ($)
Common equity tier 1 capital, actual amount	$ 102,309
Common equity tier 1 capital, actual percent of asset	0.1111
Common equity tier 1 capital, amount required to be adequately capitalized	$ 41,421
Common equity tier 1 capital, percent of assets required to be adequately capitalized	0.0450	[1]
Common equity tier 1 capital, excess capital amount	$ 60,888
Common equity tier 1 capital, excess capital percent of assets	0.0661	[1]
Common equity tier 1 capital, amount to be well capitalized under prompt corrective action provisions	$ 59,830
Common equity tier 1 capital, percent of assets to be well capitalized under prompt corrective action provisions	0.0650
Tier 1 leverage, actual amount	$ 102,309
Tier 1 leverage, actual percent of asset	0.0893
Tier 1 leverage, amount required to be adequately capitalized	$ 45,827
Tier 1 leverage, percent of assets required to be adequately capitalized	0.0400	[1]
Tier 1 leverage, excess capital amount	$ 56,482
Tier 1 leverage, excess capital percent of assets	0.0493	[1]
Tier 1 leverage, amount to be well capitalized under prompt corrective action provisions	$ 57,284
Tier 1 leverage, percent of assets to be well capitalized under prompt corrective action provisions	0.0500
Tier 1 risk-based capital, actual amount	$ 102,309
Tier 1 risk-based capital, actual percent of asset	0.1111
Tier 1 risk-based capital, amount required to be adequately capitalized	$ 55,228
Tier 1 risk-based capital, percent of assets required to be adequately capitalized	0.0600	[1]
Tier 1 risk-based capital, excess capital amount	$ 47,081
Tier 1 risk-based capital, excess capital percent of assets	0.0511	[1]
Tier 1 risk-based capital, amount to be well capitalized under prompt corrective action provisions	$ 73,637
Tier 1 risk-based capital, percent of assets to be well capitalized under prompt corrective action provisions	0.0800
Total risk-based capital, actual amount	$ 113,821
Total risk-based capital, actual percent of asset	0.1237
Total risk-based capital, amount required to be adequately capitalized	$ 73,637
Total risk-based capital, percent of assets required to be adequately capitalized	0.0800	[1]
Total risk-based capital, excess capital amount	$ 40,184
Total risk-based capital, excess capital percent of assets	0.0437	[1]
Total risk-based capital, amount to be well capitalized under prompt corrective action provisions	$ 92,047
Total risk-based capital, percent of assets to be well capitalized under prompt corrective action provisions	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.