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Business Segments (Tables)

12 Months Ended

Dec. 31, 2022

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						2022						2021
			Coal Mining customer						39		%				43		%
			NAMining customer						17		%				19		%

Segment Reporting Information

The following tables present revenue, operating profit, depreciation expense and capital expenditures for the years ended December 31:

			2022						2021
Revenues
Coal Mining			$	95,204					$	82,831
NAMining			85,664						78,944
Minerals Management			60,242						31,003
Unallocated Items			2,952						4,695
Eliminations			(2,343)						(5,627)
Total			$	241,719					$	191,846
Operating profit (loss)
Coal Mining			$	38,309					$	45,784
NAMining			2,202						3,384
Minerals Management			52,214						26,080
Unallocated Items			(23,233)						(19,553)
Eliminations			494						(285)
Total			$	69,986					$	55,410

Expenditures for property, plant and equipment and acquisition of mineral interests
Coal Mining			$	14,853					$	16,830
NAMining			13,203						21,100
Minerals Management			13,388						6,423
Unallocated Items			13,003						208
Total			$	54,447					$	44,561
Depreciation, depletion and amortization
Coal Mining			$	17,074					$	16,510
NAMining			6,457						4,574
Minerals Management			3,026						1,858
Unallocated Items			259						143
Total			$	26,816					$	23,085

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.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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