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Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Finite-Lived Intangible Assets | The gross and net balances are set forth in the following table:
| Gross Carrying Amount |  | Accumulated Amortization and Impairment |  | Net Balance
Balance at December 31, 2024 |  |  |  |  |
Coal supply agreement | $ | 84,200 |  |  | $ | (78,725) |  |  | $ | 5,475 |
Balance at December 31, 2023 |  |  |  |  |
Coal supply agreement | $ | 84,200 |  |  | $ | (78,194) |  |  | $ | 6,006 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482640/350-30-55-40 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-2 + Details
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