Corporate Partnership, Licensing and Research Funding Agreements (Details) (USD $)	12 Months Ended
	Dec. 31, 2012
Laboratories del Dr. Esteve, S.A. [Abstract]
Percent of cash upfront and milestone fees payable to Esteve	10.00%
Maximum aggregate cash upfront and milestone fees payable to Esteve	$ 20,000,000
Licensing and Research Funding Agreements [Abstract]
Potential license fee payable	2,500,000
License fees paid	950,000
Payment of license costs subject to FDA approval	$ 500,000