Consolidated Quarterly Financial Data - Unaudited (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended								12 Months Ended
	Feb. 28, 2017	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Financial Information Disclosure [Abstract]
Total revenues		$ 88,122	$ 122,238	$ 146,254	$ 117,387	$ 128,525	$ 124,331	$ 130,371	$ 112,541	$ 474,002	$ 495,769	$ 432,487
Gross profit		59,406	75,749	69,478	53,475	57,938	(226,000)	98,270	84,968
Operating expenses		78,241	95,084	27,591	104,239	70,663	28,236	95,003	125,112
Net (loss) income from continuing operations		(20,746)	(64,678)	(25,817)	(58,098)	738	(155,713)	(14,252)	(35,925)	(169,339)	(205,153)	2,093
Net (loss) income from discontinued operations		(1,531)	95,517	5,736	3,856	2,722	3,652	186	(635)	103,578	5,925	(4,576)
Net loss		$ (22,277)	$ 30,839	$ (20,081)	$ (54,242)	$ 3,460	$ (152,061)	$ (14,066)	$ (36,560)	$ (65,761)	$ (199,228)	$ (2,483)
Basic net (loss) income per share:
(Loss) income from continuing operations (in dollars per share)		$ (0.60)	$ (1.88)	$ (0.75)	$ (1.70)	$ 0.02	$ (4.41)	$ (0.41)	$ (1.04)	$ (4.92)	$ (5.88)	$ 0.06
(Loss) income from discontinued operations (in dollars per share)		(0.04)	2.77	0.17	0.11	0.08	0.10	0.01	(0.02)	3.01	0.17	(0.13)
Total (in dollars per share)		(0.64)	0.89	(0.58)	(1.59)	0.10	(4.31)	(0.40)	(1.06)	(1.91)	(5.71)	(0.07)
Diluted net (loss) income per share:
(Loss) income from continuing operations (in dollars per share)		(0.60)	(1.88)	(0.75)	(1.70)	0.02	(4.41)	(0.41)	(1.04)	(4.92)	(5.88)	0.06
Income (loss) from discontinued operations (in dollars per share)		(0.04)	2.77	0.17	0.11	0.08	0.10	0.01	(0.02)	3.01	0.17	(0.13)
Total (in dollars per share)		$ (0.64)	$ 0.89	$ (0.58)	$ (1.59)	$ 0.10	$ (4.31)	$ (0.40)	$ (1.06)	$ (1.91)	$ (5.71)	$ (0.07)
Condensed Financial Statements, Captions [Line Items]
Impairment of intangible assets										$ 0	$ 319,246	$ 15,724
Makena
Condensed Financial Information Disclosure [Abstract]
Total revenues										322,265	387,158	$ 334,050
Makena | Developed technology rights
Condensed Financial Statements, Captions [Line Items]
Impairment of intangible assets							$ 319,200
Contingent Consideration
Condensed Financial Statements, Captions [Line Items]
Adjustments to fair value of contingent consideration				$ 49,800			$ 49,900			$ (49,607)	$ (47,686)
Palatin Technologies, Inc.
Condensed Financial Statements, Captions [Line Items]
Upfront payment	$ 60,000								$ 60,000