Related Party Transactions (Details) (USD $) Share data in Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2013 Raizen [Member]	Sep. 30, 2013 Raizen [Member]	Sep. 30, 2013 Exela PharmaSci, Inc [Member]	Sep. 30, 2012 Exela PharmaSci, Inc [Member]
Related Party Transaction [Line Items]
Shares held by collaboration company (shares)	5.6	5.6
Material financial activity	$ 0	$ 0
Collaborative research and development revenue			$ 2,300,000	$ 200,000