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PROPERTY, PLANT AND EQUIPMENT (Tables) | 12 Months Ended
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Dec. 31, 2024
PROPERTY, PLANT AND EQUIPMENT |
Schedule of net book value of property, plant and equipment | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Net Book Value of Property, Plant and Equipment at December 31, 2024
(thousands of dollars) |  | Alabama |  | Corporate |  | Total
Mineral rights and properties | ​ | $ | 8,972 | ​ | $ | — | ​ | $ | 8,972
Other property, plant and equipment | ​ |  | 5,607 | ​ |  | 13 | ​ |  | 5,620
Construction in progress | ​ | ​ | 123,276 | ​ | ​ | — | ​ | ​ | 123,276
Total | ​ | $ | 137,855 | ​ | $ | 13 | ​ | $ | 137,868
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​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Net Book Value of Property, Plant and Equipment at December 31, 2023
(thousands of dollars) |  | Alabama |  | Corporate |  | Total
Mineral rights and properties | ​ | $ | 8,972 | ​ | $ | — | ​ | $ | 8,972
Other property, plant and equipment | ​ |  | 5,845 | ​ |  | 18 | ​ |  | 5,863
Construction in progress | ​ | ​ | 117,565 | ​ | ​ | — | ​ | ​ | 117,565
Total | ​ | $ | 132,382 | ​ | $ | 18 | ​ | $ | 132,400

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 10 -Topic 360 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 + Details
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