Endo License and Development Agreement (Details Textual) (USD $)	1 Months Ended		12 Months Ended
	May 31, 2012	Jan. 31, 2012	Dec. 31, 2012 NumberOfMilestones	Jan. 17, 2012
License and Development Agreement (Textual) [Abstract]
Non-refundable payment received			$ 30,000,000	$ 30,000,000
Potential milestone payments			95,000,000
Number of potential milestone payments			6
Potential milestone payments on intellectual property rights			35,000,000
Potential milestone payments on issuance of patent			15,000,000
Potential milestone payment receivable clinical development			20,000,000
Potential milestone payment receivable regulatory events			40,000,000
Number of potential sales milestones			4
Payment receivable on achievement of potential sales milestones			55,000,000
Term of Endo Agreement			10 years
Recognized up-front payment allocated to the license			15,600,000
Recognized up-front payment to clinical trial material and development services			14,400,000
Estimated amount recognized against clinical services deliverable			5,200,000
Deferred revenue income of the research and development activities			9,200,000
Milestone payment received	15,000,000	30,000,000
Extended patent on drug delivery technology			2020 to 2027
Upfront payment			$ 0