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Note 7 - Investments in Privately-Held Raw Material Companies - Summary Information for Equity Method Investments (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Gross profit $ 6,224 $ 5,682 $ 6,416 $ 19,428
Operating income (1,123) (3,406) (18,143) (8,638)
Net income (loss) (1,673) (2,887) (19,363) (6,134)
Five Minority Investments [Member]        
Net revenue 8,870 10,473 24,591 27,915
Gross profit 1,902 4,876 5,708 12,966
Operating income 1,135 4,135 3,428 11,541
Net income (loss) $ 817 $ 3,443 $ 1,591 $ 8,624