Inventories (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Inventory Disclosure [Abstract]
Crude oil	$ 20,381,000	$ 22,320,000
Caustic soda	7,298,000	9,150,000
NaHS	10,902,000	17,605,000
Raw materials - Alkali Business	7,264,000	8,355,000
Work-in-process - Alkali Business	4,733,000	11,404,000
Finished goods, net - Alkali Business	39,512,000	48,706,000
Materials and supplies, net - Alkali Business	20,649,000	17,691,000
Inventories	110,739,000	135,231,000
Inventory write down	$ 400,000	$ 200,000