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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 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Gross profit $ 1,433 $ 7,652 $ 192 $ 13,746
Operating income (6,745) (1,885) (17,020) (5,232)
Net income (loss) (7,674) (1,199) (17,690) (3,247)
Five Minority Investments [Member]        
Net revenue 7,064 9,338 15,722 17,442
Gross profit 1,862 4,161 3,806 8,090
Operating income 1,010 4,035 2,292 7,406
Net income (loss) $ (197) $ 2,044 $ 774 $ 5,182