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v3.22.4

Business Segments (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Segment Reporting Information [Line Items] |  |
Revenues | $ 241,719 | $ 191,846
Operating profit (loss) | 69,986 | 55,410
Expenditures for property, plant and equipment and acquisition of mineral interests | 54,447 | 44,561
Depreciation, depletion and amortization | 26,816 | 23,085
Operating Segments | Coal Mining customer |  |
Segment Reporting Information [Line Items] |  |
Revenues | 95,204 | 82,831
Operating profit (loss) | 38,309 | 45,784
Expenditures for property, plant and equipment and acquisition of mineral interests | 14,853 | 16,830
Depreciation, depletion and amortization | 17,074 | 16,510
Operating Segments | NAMining customer |  |
Segment Reporting Information [Line Items] |  |
Revenues | 85,664 | 78,944
Operating profit (loss) | 2,202 | 3,384
Expenditures for property, plant and equipment and acquisition of mineral interests | 13,203 | 21,100
Depreciation, depletion and amortization | 6,457 | 4,574
Operating Segments | Minerals Management |  |
Segment Reporting Information [Line Items] |  |
Revenues | 60,242 | 31,003
Operating profit (loss) | 52,214 | 26,080
Expenditures for property, plant and equipment and acquisition of mineral interests | 13,388 | 6,423
Depreciation, depletion and amortization | 3,026 | 1,858
Unallocated Items |  |
Segment Reporting Information [Line Items] |  |
Revenues | 2,952 | 4,695
Operating profit (loss) | (23,233) | (19,553)
Expenditures for property, plant and equipment and acquisition of mineral interests | 13,003 | 208
Depreciation, depletion and amortization | 259 | 143
Eliminations |  |
Segment Reporting Information [Line Items] |  |
Revenues | (2,343) | (5,627)
Operating profit (loss) | $ 494 | $ (285)

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