CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (DEFICIT) (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Common Stock Warrants	Additional Paid-in Capital	Accumulated Earnings (Deficit)
Beginning Balance (Predecessor) at Dec. 31, 2017	$ (369,272)	$ 7,714	$ 3,557	$ 546,696	$ (927,239)
Beginning Balance, Shares (Predecessor) at Dec. 31, 2017		15,428,000
Stock-based compensation | Predecessor	1,601	$ 261		1,340
Stock-based compensation, Shares | Predecessor		523,000
Income tax withholdings related to equity awards | Predecessor	$ (365)	$ (26)		(339)
Income tax withholdings related to equity awards, Shares | Predecessor		(53,000)
Common stock warrants exercised | Predecessor		$ 130	(2,228)	2,098
Common stock warrants exercised, Shares | Predecessor	260,047	260,000
Net income (loss) | Predecessor	$ (41,886)				(41,886)
Ending Balance (Predecessor) at Mar. 31, 2018	(409,922)	$ 8,079	$ 1,329	549,795	(969,125)
Ending Balance, shares (Predecessor) at Mar. 31, 2018		16,158,000
Beginning Balance at Dec. 31, 2018	569,571	$ 52,936		452,513	64,122
Beginning Balance, Shares at Dec. 31, 2018		105,871,000
Stock-based compensation	648	$ (2)		650
Stock-based compensation, Shares		(3,000)
Net income (loss)	13,575				13,575
Ending Balance at Mar. 31, 2019	$ 583,794	$ 52,934		$ 453,163	$ 77,697
Ending Balance, shares at Mar. 31, 2019		105,868,000