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Commitments and Contingencies (Details) - Jun. 30, 2015 - USD ($)
$ in Millions
Total
Commitments and Contingencies [Abstract]  
Royalties paid, minimum (in hundredths) 0.50%
Royalties paid, maximum (in hundredths) 5.00%
Sublicense fees paid, maximum (in hundredths) 40.00%
Estimate of milestone payments $ 76.5