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Note 10 - Cash Dividends (Details Textual) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended |
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Nov. 30, 2025
Payments of Dividends, Total | $ 1.5 | $ 1.5 |
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

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