Summarized Quarterly Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended								12 Months Ended
	Apr. 24, 2015	May. 16, 2014	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]
Revenue			$ 6,081	$ 9,120	$ 7,367	$ 4,614	$ 9,938	$ 4,883	$ 6,737	$ 7,389	$ 27,182	$ 28,947	$ 33,012
Gross profit			1,231	1,340	1,564	691	1,515	897	2,874	4,056
Net loss from continuing operations			(11,862)	(12,981)	(6,696)	(10,165)	(9,636)	(1,461)	77,536	(4,952)	(57,605)	61,571	(72,601)
Net income (loss) from discontinued operations			3,019	(1,635)	79,160	(12,696)	(11)	(11)	(15)	(16)	67,848	(52,900)	(8,255)
Net income (loss)			$ (8,843)	$ (14,616)	$ 72,464	$ (22,861)	$ (21)	$ (13)	$ 63	$ (21)	$ 26,144	$ 8,587	$ (80,856)
Net income (loss) per share, basic and diluted (in dollars per share)			$ (0.36)	$ (0.65)	$ 3.78	$ (1.19)
Net income (loss) per share, basic (in dollars per share)							$ (1.09)	$ (0.73)	$ 3.59	$ (1.20)	$ 1.22	$ 0.48	$ (5.96)
Net income (loss) per share, diluted (in dollars per share)							$ (1.09)	$ (0.73)	$ 3.59	$ (1.61)	$ 1.22	$ 0.48	$ (5.96)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale of business											$ 0	$ 79,980	$ 0
Impairment of long-lived assets											0	(838)	0
Loss on extinguishment of debt		$ (1,254)									0	1,254	0
Zohydro ER [Member]
Quarterly Financial Information Disclosure [Abstract]
Net income (loss) from discontinued operations											67,848	(52,900)	(8,255)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale of business			$ 2,323	$ 2,474	$ 75,575
Income tax expense			3,472	5,496	$ 6,946						$ (14,060)	$ 0	$ 0
Recognition of contingent consideration	$ 14,060		$ 385
Impairment of long-lived assets				$ (5,485)
Sumavel DosePro [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale of business									$ 79,980
Impairment of long-lived assets									(838)
Healthcare Royalty [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on extinguishment of debt									$ 1,254