CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
Revenues	$ 188,756,000	$ 103,051,000	$ 279,574,000
Cost of sales	242,081,000	188,065,000	335,699,000
Gross loss	(53,325,000)	(85,014,000)	(56,125,000)
Selling, general and administrative expenses	42,533,000	39,984,000	62,199,000
Start-up costs	0	15,000	797,000
Loss on disposal or impairment of assets, net	125,778,000	889,000	44,111,000
Loss on sale of Russian proppant business	26,747,000	0	0
Operating loss	(248,383,000)	(125,902,000)	(163,232,000)
Other expense:
Interest expense, net	(7,700,000)	(5,435,000)	(470,000)
Foreign currency exchange gain, net	35,000	119,000	94,000
Other income (expense), net	905,000	10,000	(141,000)
Nonoperating income (expense), total	(6,760,000)	(5,306,000)	(517,000)
Loss before income taxes	(255,143,000)	(131,208,000)	(163,749,000)
Income tax benefit	(2,027,000)	(51,081,000)	(54,205,000)
Net loss	$ (253,116,000)	$ (80,127,000)	$ (109,544,000)
Loss per share:
Basic	$ (9.49)	$ (3.29)	$ (4.76)
Diluted	$ (9.49)	$ (3.29)	$ (4.76)