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Inventories | 3 Months Ended
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Mar. 31, 2023
Inventory Disclosure [Abstract] |
Inventories | Inventories The major components of inventories were as follows:
| March 31, 2023 |  | December 31, 2022
Petroleum products | $ | — |  |  | $ | 56 |
Crude oil | 32,206 |  |  | 6,673 |
Caustic soda | 14,632 |  |  | 15,258 |
NaHS | 6,499 |  |  | 7,085 |
Raw materials - Alkali Business | 4,569 |  |  | 5,819 |
Work-in-process - Alkali Business | 8,640 |  |  | 9,599 |
Finished goods, net - Alkali Business | 39,592 |  |  | 18,772 |
Materials and supplies, net - Alkali Business | 15,190 |  |  | 14,881 |
Total | $ | 121,328 |  |  | $ | 78,143 |
Inventories are valued at the lower of cost or net realizable value. There was no adjustment to the net realizable value of inventories during the period ended March 31, 2023. As of December 31, 2022, the net realizable value of inventories were below cost by $2.9 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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- References No definition available. + Details
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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 -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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