Condensed Consolidated Statements of Stockholders' Equity - USD ($)	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings (Accumulated Deficit)
Beginning Balance (Predecessor [Member]) at Dec. 31, 2015	$ (852,724,000)	$ 448,000	$ 776,358,000	$ (2,491,000)	$ (1,627,039,000)
Purchase of treasury shares | Predecessor [Member]	(5,000)	0	0	(5,000)	0
Issuance of restricted stock | Predecessor [Member]	0	2,000	(2,000)	0	0
Amortization of share-based compensation | Predecessor [Member]	1,118,000	0	1,118,000	0	0
Net Loss | Predecessor [Member]	851,611,000	0	0	0	851,611,000
Ending Balance (Predecessor [Member]) at Apr. 22, 2016	0	0	0	0	0
Ending Balance (Successor [Member]) at Apr. 22, 2016	229,399,000	100,000	229,299,000	0	0
Stockholders' Equity Attributable to Parent before Cancellation | Predecessor [Member]	0	450,000	777,474,000	(2,496,000)	(775,428,000)
Cancellation of Common Stock | Predecessor [Member]	0	(450,000)	(777,474,000)	2,496,000	775,428,000
Proceeds from Issuance of Common Stock | Successor [Member]	229,399,000	100,000	229,299,000	0	0
Purchase of treasury shares | Successor [Member]	(675,000)	0	0	675,000	0
Issuance of restricted stock | Successor [Member]	1,000	1,000	0	0	0
Amortization of share-based compensation | Successor [Member]	3,618,000	0	3,618,000	0	0
Net Loss | Successor [Member]	(156,288,000)	0	0	0	(156,288,000)
Ending Balance (Successor [Member]) at Dec. 31, 2016	76,055,000	101,000	232,917,000	(675,000)	(156,288,000)
Purchase of treasury shares | Successor [Member]	(267,000)	0	0	267,000	0
Issuance of common stock | Successor [Member]	39,381,000	14,000	39,367,000	0	0
Issuance of restricted stock | Successor [Member]	0	0	0	0	0
Amortization of share-based compensation | Successor [Member]	1,503,000	0	1,503,000	0	0
Net Loss | Successor [Member]	17,710,000	0	0	0	17,710,000
Ending Balance (Successor [Member]) at Mar. 31, 2017	$ 134,382,000	$ 115,000	$ 273,787,000	$ (942,000)	$ (138,578,000)