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Note 10 - Cash Dividends (Details Textual) - USD ($) $ / shares in Units, $ in Millions | 1 Months Ended | 6 Months Ended
--- | --- | ---
Jan. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Payments of Dividends, Total |  | $ 3.0 | $ 2.8
Dividends Payable |  | $ 0.2 | $ 0.1
Annual Indicated per Share Dividend Rate |  | $ 0.2 |
O2025Q3 Dividends [Member] | Subsequent Event [Member] |  |  |
Quarterly Indicated Per Share Dividend Rate | $ 0.05 |  |
Dividends Payable, Date to be Paid | Feb. 11, 2025 |  |
Dividends Payable, Date of Record | Feb. 03, 2025 |  |

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