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Inventories (Tables)

9 Months Ended

Sep. 30, 2025

Business Combination [Abstract]

Schedule of inventories

​

​	​	​	​	​	​	​	​
​	​	September 30,		​	December 31,		​
​	​	2025			2024
​	​	(in thousands)					​
Coal	​	$	48,208	​	$	37,290	​
Finished goods (net of reserve for obsolescence of $1,180 and $2,481, respectively)	​	​	13,095	​	​	14,197	​
Work in process	​	​	1,074	​	​	1,560	​
Raw materials	​	​	6,634	​	​	7,192	​
​	​	​	69,011	​	​	60,239	​
Supplies (net of reserve for obsolescence of $7,311 and $6,409, respectively)	​		61,625	​		60,422	​
Total inventories, net	​	$	130,636	​	$	120,661	​

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- References

No definition available.

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- Definition

Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

+ References

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-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
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-Subparagraph (SX 210.5-02(6)(a))
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