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Inventories
 12 Months Ended
Dec. 31, 2024
Inventory Disclosure [Abstract]  
Inventories Inventories
The major components of inventories were as follows:
 
 December 31,
 20242023
Crude oil$20,381 $22,320 
Caustic soda7,298 9,150 
NaHS10,902 17,605 
Raw materials - Alkali Business7,264 8,355 
Work-in-process - Alkali Business4,733 11,404 
Finished goods, net - Alkali Business39,512 48,706 
Materials and supplies, net - Alkali Business20,649 17,691 
Total$110,739 $135,231 
Inventories are valued at the lower of cost or net realizable value. The net realizable value of inventories were below cost by $0.4 million and $0.2 million as of December 31, 2024 and December 31, 2023, which triggered a reduction of the value of inventory in our Consolidated Financial Statements by this amount.
Materials and supplies include chemicals, maintenance supplies, and spare parts which will be consumed in the mining of trona ore and production of soda ash processes.