CONSOLIDATED QUARTERLY FINANCIAL DATA - UNAUDITED - Schedule of Effects of Corrections and Prior Period Ajustments (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	$ (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)
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
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	$ (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)
As reported | Product sales, net
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
Adj
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	$ (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)
Adj | Product sales, net
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenues	$ (224)	$ (323)	$ (342)	$ (316)	$ (251)	$ (592)	$ (591)	$ (520)	$ (1,205)	$ (1,954)	$ (1,802)