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Note 18 - Subsequent Events (Details Textual) - Subsequent Event [Member] - USD ($) $ / shares in Units, $ in Millions | Nov. 13, 2023 | Oct. 26, 2023
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Acquisition of CCM Small/Mid-Cap Impact Value Fund Assets [Member] |  |
Assets under Management, Carrying Amount | $ 12.0 |
Asset Acquisition, Consideration Transferred | $ 0.2 |
Dividend Declared [Member] |  |
Dividends Payable, Amount Per Share (in dollars per share) |  | $ 0.1375

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