REVISION OF PRIOR PERIOD FINANCIAL STATEMENTS - Condensed Consolidated Statements of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenues	$ 89,483	$ 83,808	$ 77,767	$ 75,488	$ 87,871	$ 121,646	$ 145,663	$ 116,867	$ 326,546	$ 472,048	$ 493,967
Income tax (benefit) expense	(21)	232	(120)	(137)	(2,543)	(2,340)	52,943	(7,624)	(47)	40,436	(175,521)
Net loss from continuing operations	(200,152)	(23,940)	(121,169)	(122,400)	(21,004)	(65,282)	(26,795)	(58,994)	(467,661)	(172,075)	(206,688)
Net loss	$ (200,152)	$ (23,940)	$ (121,169)	$ (122,400)	$ (22,535)	$ 30,235	$ (21,059)	$ (55,138)	$ (467,661)	$ (68,497)	$ (200,763)
Basic and diluted net loss per share (in dollars per share)	$ (5.90)	$ (0.71)	$ (3.58)	$ (3.55)	$ (0.65)	$ 0.88	$ (0.61)	$ (1.61)	$ (13.74)	$ (1.99)	$ (5.75)
As reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenues	$ 89,707	$ 84,131	$ 78,109	$ 75,804	$ 88,122	$ 122,238	$ 146,254	$ 117,387	$ 327,751	$ 474,002	$ 495,769
Income tax (benefit) expense	(21)	232	(120)	(137)	(2,550)	(2,352)	52,556	(8,000)	(47)	39,654	(175,254)
Net loss from continuing operations									(466,456)	(169,339)	(205,153)
Net loss	$ (199,928)	$ (23,617)	$ (120,827)	$ (122,084)	$ (22,277)	$ 30,839	$ (20,081)	$ (54,242)	$ (466,456)	$ (65,761)	$ (199,228)
Basic and diluted net loss per share (in dollars per share)	$ (5.89)	$ (0.70)	$ (3.57)	$ (3.54)	$ (0.64)	$ 0.89	$ (0.58)	$ (1.59)	$ (13.71)	$ (1.91)	$ (5.71)
Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenues	$ (224)	$ (323)	$ (342)	$ (316)	$ (251)	$ (592)	$ (591)	$ (520)	$ (1,205)	$ (1,954)	$ (1,802)
Income tax (benefit) expense	0	0	0	0	7	12	387	376	0	782	(267)
Net loss from continuing operations									(1,205)	(2,736)	(1,535)
Net loss	$ (224)	$ (323)	$ (342)	$ (316)	$ (258)	$ (604)	$ (978)	$ (896)	$ (1,205)	$ (2,736)	$ (1,535)
Basic and diluted net loss per share (in dollars per share)	$ (0.01)	$ (0.01)	$ (0.01)	$ (0.01)	$ (0.01)	$ (0.01)	$ (0.03)	$ (0.02)	$ (0.03)	$ (0.08)	$ (0.04)
Product sales, net
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenues	$ 73,154	$ 83,784	$ 77,634	$ 75,413	$ 87,796	$ 121,646	$ 145,628	$ 116,828	$ 309,985	$ 471,898	$ 493,843
Product sales, net | As reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenues	73,378	84,107	77,976	75,729	88,047	122,238	146,219	117,348	311,190	473,852	495,645
Product sales, net | Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenues	$ (224)	$ (323)	$ (342)	$ (316)	$ (251)	$ (592)	$ (591)	$ (520)	$ (1,205)	$ (1,954)	$ (1,802)