License And Collaboration Agreements (Grunenthal GmbH) (Narrative) (Details) - Grunenthal Agreement € in Millions, $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2013 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 EUR (€)
License And Collaboration Agreements [Line Items]
Conditional milestone payment		$ 4.9
Commercial milestone charge	$ 10.4
Additional milestone payment			$ 56.7	€ 53.9