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Inventories (Tables)
3 Months Ended
Mar. 31, 2022
Inventory Disclosure [Abstract]  
Schedule of Major Components of Inventories
The major components of inventories were as follows:
March 31,
2022
December 31, 2021
Petroleum products$795 $998 
Crude oil8,962 11,834 
Caustic soda6,654 5,690 
NaHS18,308 17,040 
Raw materials - Alkali operations7,760 7,599 
Work-in-process - Alkali operations10,058 7,496 
Finished goods, net - Alkali operations17,669 13,681 
Materials and supplies, net - Alkali operations13,888 13,620 
Total$84,094 $77,958