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Business Segments (Tables) | 12 Months Ended
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Dec. 31, 2024
Segment Reporting [Abstract] |
Schedule of Revenue by Major Customers by Reporting Segments | The following represents the revenue attributable to each of these entities as a percentage of consolidated revenue for those years:
|  |  | Percentage of Consolidated Revenue
| Segment |  | 2024 |  | 2023
| Coal Mining customer |  | 29 | % |  | 40 | %
| NAMining customer |  | 24 | % |  | 22 | %
| NAMining customer |  | 11 | % |  | 7 | %
Schedule of Segment Reporting Information | The following tables provide segment financial information and a reconciliation of segment results to consolidated results for the years ended December 31:
| 2024 |  | 2023 |  |
Revenues |  |  |  |  |
Coal Mining | $ | 68,611 |  |  | $ | 85,415 |  |  |
NAMining | 119,600 |  |  | 90,532 |  |  |
Minerals Management | 34,579 |  |  | 32,985 |  |  |
Unallocated Items | 17,707 |  |  | 8,459 |  |  |
Eliminations | (2,789) |  |  | (2,597) |  |  |
Total | $ | 237,708 |  |  | $ | 214,794 |  |  |
Cost of sales |  |  |  |  |
Coal Mining | $ | 79,375 |  |  | $ | 108,760 |  |  |
NAMining | 110,821 |  |  | 83,719 |  |  |
Minerals Management | 5,234 |  |  | 3,969 |  |  |
Unallocated Items | 15,323 |  |  | 6,252 |  |  |
Eliminations | (2,801) |  |  | (2,497) |  |  |
Total | $ | 207,952 |  |  | $ | 200,203 |  |  |
Earnings of unconsolidated operations |  |  |  |  |
Coal Mining | $ | 51,821 |  |  | $ | 44,633 |  |  |
NAMining | 5,010 |  |  | 5,361 |  |  |
Minerals Management | 647 |  |  | — |  |  |
Unallocated Items | (2) |  |  | — |  |  |
Total | $ | 57,476 |  |  | $ | 49,994 |  |  |
Operating expenses* |  |  |  |  |
Coal Mining | $ | 30,358 |  |  | $ | 92,630 |  |  |
NAMining | 8,017 |  |  | 8,826 |  |  |
Minerals Management | 1,065 |  |  | 9,598 |  |  |
Unallocated Items | 25,699 |  |  | 23,668 |  |  |
Total | $ | 65,139 |  |  | $ | 134,722 |  |  |
*Operating expenses consist of Selling, general and administrative expenses, Amortization of intangible assets, (Gain) loss on sale of assets and Long-lived asset impairment charges.
| 2024 |  | 2023 |  |
Operating profit (loss) |  |  |  |  |
Coal Mining | $ | 24,311 |  |  | $ | (71,342) |  |  |
NAMining | 5,772 |  |  | 3,348 |  |  |
Minerals Management | 28,927 |  |  | 19,418 |  |  |
Unallocated Items | (23,317) |  |  | (21,461) |  |  |
Eliminations | 12 |  |  | (100) |  |  |
Total | $ | 35,705 |  |  | $ | (70,137) |  |  |
Expenditures for property, plant and equipment and acquisition of mineral interests |  |  |  |  |
Coal Mining | $ | 8,292 |  |  | $ | 6,609 |  |  |
NAMining | 30,556 |  |  | 36,073 |  |  |
Minerals Management | 1,079 |  |  | 38,881 |  |  |
Unallocated Items | 15,492 |  |  | 559 |  |  |
Total | $ | 55,419 |  |  | $ | 82,122 |  |  |
Depreciation, depletion and amortization |  |  |  |  |
Coal Mining | $ | 9,476 |  |  | $ | 17,569 |  |  |
NAMining | 9,811 |  |  | 8,172 |  |  |
Minerals Management | 4,273 |  |  | 3,067 |  |  |
Unallocated Items | 1,092 |  |  | 579 |  |  |
Total | $ | 24,652 |  |  | $ | 29,387 |  |  |

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- Definition Tabular disclosure of the extent of the entity's reliance on its major customers, if revenues from transactions with a single external customer amount to 10 percent or more of entity revenues, including the disclosure of that fact, the total amount of revenues from each such customer, and the identity of the reportable segment or segments reporting the revenues. The entity need not disclose the identity of a major customer or the amount of revenues that each segment reports from that customer. For these purposes, a group of companies known to the entity to be under common control is considered a single customer, and the federal government, a state government, a local government such as a county or municipality, or a foreign government is each considered a single customer. + References No definition available. + Details
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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-25 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-22 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-30 + Details
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