AVINZA Co-Promotion (Co-Promote Termination Liability) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013
Summary of co-promote termination liability
Net present value of payments based on estimated future net Avinza product sales as of December 31, 2012	$ 12,534
Assumed payments made by Pfizer or assignee	(2,450)
Fair value adjustments	2,810
Total co-promote termination liability as of September 30, 2013	12,894
Less: current portion of co-promote termination liability as of September 30, 2013	4,507
Long-term portion of co-promote termination liability as of September 30, 2013	$ 8,387