Inventories (Tables)

6 Months Ended

Jun. 30, 2019

Inventories

Schedule of inventories, net

	June 30,		December 31,
	2019		2018
Materials and supplies	$	66,611	$	68,519
Less: Obsolescence allowance		(50,750)		(1,089)
Material and supplies, net		15,861		67,430
Coal inventory		1,100		2,610
Inventories, net	$	16,961	$	70,040