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Note 7 - Stockholders' Equity - Common Share Dividends (Details) - USD ($) $ / shares in Units, $ in Thousands | Jun. 01, 2026 | Mar. 01, 2026 | Dec. 01, 2025 | Sep. 01, 2025 | Jun. 01, 2025 | Mar. 01, 2025
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Dividend (in dollars per share) | $ 0.06 | $ 0.06 | $ 0.06 | $ 0.06 | $ 0.06 | $ 0.06
Total paid | $ 833 | $ 839 | $ 844 | $ 844 | $ 842 | $ 842

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