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Note 21 - Regulatory Matters (Details Textual) $ in Thousands | Jun. 30, 2022 USD ($) | Mar. 07, 2022 | Dec. 31, 2021 USD ($) | Jan. 01, 2019 | Jan. 01, 2016
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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 |  | 6.00% |  |  |  |  |
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% |  |  |  |  |
Capital Conservation Buffer |  |  |  |  |  | 2.50% | 0.625%
Subordinated Debt, Ending Balance |  | $ 26,144 |  |  | $ 0 |  |
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 | [2] | 0.050 |  |  | 0.0500 |  |
[1] | Ratio is computed in relation to risk-weighted assets.
[2] | Ratio is computed in relation to average assets.

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- Definition An additional amount held in risk-based capital designed to ensure that banks build up capital buffers outside periods of stress which can be drawn down as losses are incurred. The requirement is based on simple capital conservation rules designed to avoid breaches of minimum capital requirements. + References No definition available. + Details
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- Definition Represents tier one risk based capital required for capital adequacy to risk weighted assets including capital conservation buffer. + References No definition available. + Details
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- Definition Minimum capital conservation buffer percentage required to avoid restriction on payout amount of eligible retained income as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
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