Sale of Sumavel DosePro Business Net Assets and Calculation of Gain on Sale (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended			0 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	May 16, 2014 Sumavel DosePro [Member]	Jun. 30, 2014 Sumavel DosePro [Member]	May 16, 2014 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	4,874		4,874		1,112			(4,624)
Transaction costs								(660)
Deferred revenue associated with undelivered elements							(9,005)	(9,108)
Net gain on sale of business	$ 79,980	$ 0	$ 79,980	$ 0		$ 79,980	$ 79,980