Inventories (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Inventory Disclosure [Abstract]
Petroleum products	$ 0	$ 56,000
Crude oil	22,320,000	6,673,000
Caustic soda	9,150,000	15,258,000
NaHS	17,605,000	7,085,000
Raw materials - Alkali Business	8,355,000	5,819,000
Work-in-process - Alkali Business	11,404,000	9,599,000
Finished goods, net - Alkali Business	48,706,000	18,772,000
Materials and supplies, net - Alkali Business	17,691,000	14,881,000
Inventories	135,231,000	78,143,000
Inventory write down	$ 200,000	$ 2,900,000