CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Loss	Retained Earnings
Beginning Balance (in shares) (Predecessor [Member]) at Dec. 31, 2015		157,543
Beginning Balance (Predecessor [Member]) at Dec. 31, 2015	$ 140,290	$ 15,754	$ 966,637	$ (43,740)	$ (798,361)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Foreign currency translation | Predecessor [Member]	3,346	$ 0	0	3,346	0
Common stock purchases (in shares) | Predecessor [Member]		(569)
Common stock purchases | Predecessor [Member]	(167)	$ (57)	(110)	0	0
Exercise of warrants | Predecessor [Member]	0
Exercise of warrants	0
Share-based compensation (in shares) | Predecessor [Member]		3,579
Share-based compensation | Predecessor [Member]	5,740	$ 358	5,382	0	0
Other Additional Capital | Predecessor [Member]			(10)
Other Additional Capital	10
Distributions to holders of Predecessor common stock | Predecessor [Member]	17,463		17,463
Net loss | Predecessor [Member]	(131,736)	$ 0	0	0	(131,736)
Ending Balance (in shares) (Predecessor [Member]) at Dec. 15, 2016		160,553
Ending Balance (in shares) at Dec. 15, 2016		20,077
Ending Balance (Predecessor [Member]) at Dec. 15, 2016	0	$ 16,055	954,436	(40,394)	(930,097)
Ending Balance at Dec. 15, 2016	252,130	$ 201	251,929	0	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cancellation Of Equity, Shares | Predecessor [Member]		(160,553)
Cancellation Of Equity | Predecessor [Member]	0	$ (16,055)	(954,436)	40,394	930,097
Foreign currency translation	239	$ 0	0	239	0
Share-based compensation (in shares)		19
Share-based compensation	492	$ 0	492	0	0
Net loss	(10,244)	$ 0	0	0	(10,244)
Shares Issued In Rights Offering		11,769
Shares Issued In Rights Offering, Value	108,984	$ 118	108,866	0	0
Shares Withheld To Satisfy Tax Withholding Obligations		(8)
Shares Withheld To Satisfy Tax Withholding Obligations, Value	(210)	$ 0	(210)	0	0
Issuance Of Shares Pursuant To The Plan		8,316
Issuance Of Shares Pursuant To The Plan, Value	139,588	$ 83	139,505	0	0
Issuance Of Warrants Pursuant To The Plan		0
Issuance Of Warrants Pursuant To The Plan, Value	3,768	$ 0	3,768	0	0
Ending Balance (in shares) at Dec. 31, 2016		20,096
Ending Balance at Dec. 31, 2016	242,617	$ 201	252,421	239	(10,244)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Foreign currency translation	(239)	$ 0	0	(239)	0
Common stock purchases (in shares)		(56)
Common stock purchases	(697)	$ (1)	(696)	0	0
Exercise of warrants	0
Share-based compensation (in shares)		177
Share-based compensation	7,591	$ 2	7,589	0	0
Net loss	(120,589)	$ 0	0	0	(120,589)
Ending Balance (in shares) at Dec. 31, 2017		20,217
Ending Balance at Dec. 31, 2017	128,683	$ 202	259,314	0	(130,833)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Foreign currency translation	0
Common stock purchases (in shares)		(48)
Common stock purchases	(280)	$ 0	(280)	0	0
Exercise of warrants	$ 3	$ 0	3	0	0
Exercise of stock warrants (in shares)	0
Share-based compensation (in shares)		194
Share-based compensation	$ 5,910	$ 2	5,908	0	0
Net loss	(88,796)	$ 0	0	0	(88,796)
Ending Balance (in shares) at Dec. 31, 2018		20,363
Ending Balance at Dec. 31, 2018	$ 45,520	$ 204	$ 264,945	$ 0	$ (219,629)