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Business Segments (Tables)

12 Months Ended

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

X

- 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.

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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

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-Name Accounting Standards Codification
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-Paragraph 30
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