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Inventories | 3 Months Ended
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Mar. 31, 2024
Inventory Disclosure [Abstract] |
Inventories | Inventories The major components of inventories were as follows:
| March 31, 2024 |  | December 31, 2023
Crude oil | 30,078 |  |  | 22,320 |
Caustic soda | 8,202 |  |  | 9,150 |
NaHS | 15,850 |  |  | 17,605 |
Raw materials - Alkali Business | 8,075 |  |  | 8,355 |
Work-in-process - Alkali Business | 5,717 |  |  | 11,404 |
Finished goods, net - Alkali Business | 40,054 |  |  | 48,706 |
Materials and supplies, net - Alkali Business | 18,669 |  |  | 17,691 |
Total | $ | 126,645 |  |  | $ | 135,231 |
Inventories are valued at the lower of cost or net realizable value. As of March 31, 2024 , the net realizable value of our inventories was greater than the respective cost. At December 31, 2023, the net realizable value of our inventories was less than the respective cost by $0.2 million, 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.

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 330 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//330/tableOfContent + Details
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