Note 22 - Regulatory Matters (Details Textual) $ in Thousands		Mar. 31, 2023 USD ($)		Dec. 31, 2022 USD ($)	Mar. 07, 2022
Banking Regulation, Capital Conservation Buffer, Capital Conserved, Minimum		0.025
Common Equity Tier One Risk Based Capital, Required to Be Well Capitalized to Risk Weighted Assets Including Capital Conservation Buffer		7.00%
Tier One Risk Based Capital Required for Capital Adequacy to Risk Weighted Assets Including Capital Conservation Buffer		8.50%
Capital Required for Capital Adequacy to Risk Weighted Assets Including Capital Conservation Buffer		10.50%
Subordinated Debt, Ending Balance		$ 26,442		$ 26,343
Commonwealth [Member]
Business Acquisition, Percentage of Voting Interests Acquired					100.00%
Subordinated Debt, Ending Balance		$ 26,000
Commonwealth Statutory Trust III [Member] | Commonwealth [Member]
Business Acquisition, Percentage of Voting Interests Acquired					100.00%
Commonwealth Statutory Trust IV [Member] | Commonwealth [Member]
Business Combination, Unconsolidated Trust Subsidiaries Acquired, Percent					100.00%
Commonwealth Statutory Trust V [Member] | Commonwealth [Member]
Business Combination, Unconsolidated Trust Subsidiaries Acquired, Percent					100.00%
Subsidiaries [Member]
Banking Regulation, Common Equity Tier One Risk-Based Capital Ratio, Well Capitalized, Minimum		0.065	[1]	0.0650
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets	[1]	0.080		0.0800
Banking Regulation, Total Risk-Based Capital Ratio, Well Capitalized, Minimum	[1]	0.100		0.1000
Tier One Leverage Capital Required to be Well Capitalized to Average Assets		0.050		0.0500

[1] Ratio is computed in relation to risk-weighted assets.