Agreements (Details 6) (Novartis, USD $)	12 Months Ended	1 Months Ended	12 Months Ended						12 Months Ended
	Jun. 30, 2012	Oct. 31, 2010 Right-to-test agreement item	Jun. 30, 2012 Development and Commercialization License	Oct. 31, 2010 Development and Commercialization License	Oct. 31, 2010 Development and Commercialization License Maximum	Oct. 31, 2010 Development and Commercialization License Development milestones	Oct. 31, 2010 Development and Commercialization License Regulatory milestones	Oct. 31, 2010 Development and Commercialization License Sales milestones	Jun. 30, 2012 Future Technological Improvements	Jun. 30, 2012 Research Services
Collaborative Agreements disclosures
Term of agreement		3 years
Number of extension terms		2
Term of extension of agreement		1 year
Payments received under collaboration agreement		$ 45,000,000
License exercise fee, per license				1,000,000
Potential milestone payments receivable					199,500,000	22,500,000	77,000,000	100,000,000
Allocation of fees to deliverables
Estimated utilization period after commercialization	10 years
Discount rate (as a percent)	16.00%
Total expected arrangement consideration	$ 55,100,000		$ 47,300,000						$ 3,900,000	$ 3,900,000
Estimated term of development and commercialization license			25 years