Inventories (Tables)

6 Months Ended

Jun. 30, 2021

Inventory Disclosure [Abstract]

Schedule of Major Components of Inventories

The major components of inventories were as follows:

	June 30, 2021		December 31, 2020
Petroleum products	$	1,308	$	5,840
Crude oil	23,597		37,661
Caustic soda	4,459		5,167
NaHS	10,701		9,101
Raw materials - Alkali operations	7,230		7,120
Work-in-process - Alkali operations	4,455		9,355
Finished goods, net - Alkali operations	13,279		13,002
Materials and supplies, net - Alkali operations	13,298		12,631
Total	$	78,327	$	99,877