Summary of Significant Accounting Policies (Details 6)	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Segment Reporting
Number of reportable segments	1
Amgen
Collaborative Partner:
Percentages of revenue recognized	6.00%	30.00%	41.00%
Bayer HealthCare
Collaborative Partner:
Percentages of revenue recognized	4.00%	15.00%	17.00%
Biotest
Collaborative Partner:
Percentages of revenue recognized	5.00%	14.00%	9.00%
Novartis
Collaborative Partner:
Percentages of revenue recognized	49.00%	16.00%	7.00%
Roche
Collaborative Partner:
Percentages of revenue recognized	30.00%	0.00%	0.00%
Sanofi
Collaborative Partner:
Percentages of revenue recognized	3.00%	23.00%	23.00%