Licensing Agreements (Details) (USD $)	1 Months Ended	12 Months Ended		1 Months Ended	0 Months Ended	1 Months Ended
	May 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014 item	May 13, 2013	Mar. 31, 2014
Collateralized loan amount, maximum	$ 12,000,000
Research and development expense related to in-licensing deals		11,000,000	5,000,000
The Medicines Company [Member]
Number of products				2
Commitment agreement payment amount		50,500,000
Zensun [Member]
Commitment agreement payment amount					18,500,000
Commitment agreement additional payment amount					10,000,000
Commitment agreement further payments upon approval for new indications of product					25,000,000
Collateralized loan amount, maximum		12,000,000
TLC [Member]
Commitment agreement payment amount						$ 39,500,000