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Note 12 - Regulatory Capital (Tables) | 12 Months Ended
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Dec. 31, 2023
Notes Tables |
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block] |
(Dollars in millions) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Minimum Required To Be |
|  |  |  |  |  |  |  |  |  | Minimum Required For |  |  | Well Capitalized Under Prompt |
|  | Actual |  |  | Capital Adequacy Purposes |  |  | Corrective Action Regulations |
December 31, 2023 |  | Amount |  |  | Ratio |  |  | Amount |  |  | Ratio |  |  | Amount |  |  | Ratio |
Common equity tier 1 capital to risk-weighted assets |  | $ | 168.3 |  |  |  | 10.4 | % |  | $ | 72.6 |  |  |  | 4.5 | % |  | $ | 104.9 |  |  |  | 6.5 | %
Tier 1 capital to risk-weighted assets |  | $ | 168.3 |  |  |  | 10.4 | % |  | $ | 96.9 |  |  |  | 6.0 | % |  | $ | 129.1 |  |  |  | 8.0 | %
Total capital to risk-weighted assets |  | $ | 183.3 |  |  |  | 11.4 | % |  | $ | 129.1 |  |  |  | 8.0 | % |  | $ | 161.4 |  |  |  | 10.0 | %
Tier 1 capital to adjusted average assets |  | $ | 168.3 |  |  |  | 7.8 | % |  | $ | 86.6 |  |  |  | 4.0 | % |  | $ | 108.2 |  |  |  | 5.0 | %
(Dollars in millions) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Minimum Required To Be |
|  |  |  |  |  |  |  |  |  | Minimum Required For |  |  | Well Capitalized Under Prompt |
|  | Actual |  |  | Capital Adequacy Purposes |  |  | Corrective Action Regulations |
December 31, 2022 |  | Amount |  |  | Ratio |  |  | Amount |  |  | Ratio |  |  | Amount |  |  | Ratio |
Common equity tier 1 capital to risk-weighted assets |  | $ | 161.3 |  |  |  | 10.1 | % |  | $ | 71.6 |  |  |  | 4.5 | % |  | $ | 103.4 |  |  |  | 6.5 | %
Tier 1 capital to risk-weighted assets |  | $ | 161.3 |  |  |  | 10.1 | % |  | $ | 95.5 |  |  |  | 6.0 | % |  | $ | 127.3 |  |  |  | 8.0 | %
Total capital to risk-weighted assets |  | $ | 174.2 |  |  |  | 10.9 | % |  | $ | 127.3 |  |  |  | 8.0 | % |  | $ | 159.1 |  |  |  | 10.0 | %
Tier 1 capital to adjusted average assets |  | $ | 161.3 |  |  |  | 7.7 | % |  | $ | 84.3 |  |  |  | 4.0 | % |  | $ | 105.4 |  |  |  | 5.0 | %

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- Definition Tabular disclosure of the capital amounts and ratios as of the balance sheet date, indicating whether the entity or entities are in compliance with regulatory capital requirements, by entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480696/942-505-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org//1943274/2147480696/942-505-50-1B + Details
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