Inventories (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Inventory Disclosure [Abstract]
Petroleum products	$ 56,000	$ 998,000
Crude oil	6,673,000	11,834,000
Caustic soda	15,258,000	5,690,000
NaHS	7,085,000	17,040,000
Raw materials - Alkali Operations	5,819,000	7,599,000
Work-in-process - Alkali Operations	9,599,000	7,496,000
Finished goods, net - Alkali Operations	18,772,000	13,681,000
Materials and supplies, net - Alkali Operations	14,881,000	13,620,000
Inventories	78,143,000	77,958,000
Inventory write down	$ 2,900,000	$ 2,000,000