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Inventories (Tables)

12 Months Ended

Dec. 31, 2019

Inventory Disclosure [Abstract]

Schedule of Inventory

Inventories are summarized as follows:

	December 31
	2019				2018
Coal	$	15,700			$	11,030
Mining supplies	24,765				20,179
Total inventories	$	40,465			$	31,209

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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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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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