Agreements (Details 5) (Bayer HealthCare, Exclusive development and commercialization license, USD $)	1 Months Ended	12 Months Ended	57 Months Ended
	Oct. 31, 2008	Jun. 30, 2012	Jun. 30, 2013
Collaborative Agreements disclosures
Payments received under collaboration agreement	$ 4,000,000		$ 3,000,000
Estimated increase in license and milestone fees recognized due to change in estimate		1,200,000
Maximum
Collaborative Agreements disclosures
Potential milestone payments receivable	170,500,000
Phase II clinical trial
Collaborative Agreements disclosures
Potential milestone payments receivable			4,000,000
Development milestones
Collaborative Agreements disclosures
Potential milestone payments receivable	16,000,000
Regulatory milestones
Collaborative Agreements disclosures
Potential milestone payments receivable	44,500,000
Sales milestones
Collaborative Agreements disclosures
Potential milestone payments receivable	$ 110,000,000