Sale of Sumavel DosePro Business - Net Assets and Calculation of Gain on Sale (Details) (Details) - USD ($) $ in Thousands		12 Months Ended
	May. 16, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Imputed interest on working capital advance		$ 4,615
Net gain on sale of business		89,484	$ 79,980	$ 0
Sumavel DosePro [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Non-contingent consideration received	$ 89,624
Imputed interest on working capital advance	4,748
Carrying value of Sumavel DosePro inventory on hand at Closing	(4,624)
Transaction costs	(660)		(660)
Deferred revenue associated with undelivered elements	(9,108)	$ (7,083)	(8,535)
Net gain on sale of business	$ 79,980		$ 79,980