CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit
Balance at Dec. 31, 2017	$ (54,087)	$ 312	$ 493,952	$ (548,351)
Balance, shares at Dec. 31, 2017		31,244,085
Cumulative effect adjustment	(325)			(325)
Equity based compensation	228		228
Net loss	(22,943)			(22,943)
Balance at Mar. 31, 2018	(77,127)	$ 312	494,180	(571,619)
Balance, shares at Mar. 31, 2018		31,244,085
Balance at Dec. 31, 2018	$ 1,007,496	$ 542	1,334,090	(327,136)
Balance, shares at Dec. 31, 2018	54,155,768	54,155,768
Equity based compensation	$ 2,126		2,126
Equity based compensation, Shares		37
Net loss	(109,636)			(109,636)
Balance at Mar. 31, 2019	$ 899,986	$ 542	$ 1,336,216	$ (436,772)
Balance, shares at Mar. 31, 2019	54,155,805	54,155,805