Investments in Privately-Held Raw Material Companies - Minority Investment Entities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest
Net revenue	$ 19,356	$ 22,688
Gross profit	(1,241)	6,094
Net income	(10,016)	(2,048)
Gross Profit
Equity in income of unconsolidated joint ventures	248	890
Current assets	149,531		$ 158,272
Current liabilities	75,256		$ 74,176
Five Minority Investments
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest
Net revenue	8,658	8,104
Gross profit	1,944	3,929
Operating income	1,282	3,371
Net income	971	3,138
Five Minority Investments
Gross Profit
Equity in income of unconsolidated joint ventures	$ 200	$ 900