Endo License and Development Agreement (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	6 Months Ended
	May 31, 2012	Jun. 30, 2012 Milestones	Jan. 17, 2012
Endo License and Development Agreement (Textual) [Abstract]
Non-refundable upfront license fee			$ 30.0
Endo License and Development Agreement (Additional Textual) [Abstract]
Potential milestone payments		95
Potential milestone payments on issuance of patent		15
Potential milestone payment on intellectual rights		35
Payments receivable on achievement of potential sales milestones		55
Term of Endo Agreement		10 years
Extended patent on drug delivery technology		2020 to 2027
Milestone payment received	15
Potential milestone payment receivable clinical development		20
Potential milestone payment receivable regulatory events		40
Number of potential sales milestones		4
Number of potential milestone payments		6
Non-refundable payment recognized		1.2
Non-refundable payment unrecognized		12.3
License Agreement Terms [Member]
Endo License and Development Agreement (Textual) [Abstract]
Non-refundable upfront license fee		15.6
Clinical Development Services [Member]
Endo License and Development Agreement (Textual) [Abstract]
Non-refundable upfront license fee		$ 14.4