CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Revenues	$ 47,458	$ 49,367
Cost of sales (exclusive of depreciation and amortization shown below)	47,905	50,971
Depreciation and amortization	7,403	8,411
Gross loss	(7,850)	(10,015)
Selling, general and administrative expenses (exclusive of depreciation and amortization shown below)	10,034	9,607
Depreciation and amortization	398	614
Other operating income	(71)	(4)
Operating loss	(18,211)	(20,232)
Other expense:
Interest expense, net	(2,077)	(2,017)
Other income (expense), net	294	(23)
Nonoperating income (expense), total	(1,783)	(2,040)
Loss before income taxes	(19,994)	(22,272)
Income tax benefit	0	0
Net loss	$ (19,994)	$ (22,272)
Loss per share:
Basic	$ (0.73)	$ (0.83)
Diluted	(0.73)	(0.83)
Other information:
Dividends declared per common share	$ 0	$ 0