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Commitments and Contingencies - Additional Information (Detail)
€ in Millions
3 Months Ended
Jul. 31, 2014
EUR (€)
Mar. 31, 2016
USD ($)
Mar. 31, 2016
EUR (€)
Jul. 01, 2013
USD ($)
Commitments and Contingencies [Line Items]        
Purchase commitment amount under Insulin Supply Agreement € 120.1      
Purchase obligation     € 98.5  
Purchase obligation, due in 2016     28.8  
Purchase obligation, due in 2017     23.3  
Purchase obligation, due in 2018     23.3  
Purchase obligation, due in 2019     € 23.3  
Purchase commitment cancellation fees | $   $ 5,200,000    
Foreign currency transaction loss | $   $ 2,364,000    
Supply Agreement expiration period   Dec. 31, 2019    
Supply Agreement renewal period   2 years    
Insulin Put        
Commitments and Contingencies [Line Items]        
Purchase obligation | $   $ 50,000,000    
Deerfield | Milestone Rights Liability | Maximum        
Commitments and Contingencies [Line Items]        
Contingent liability for milestone payments | $       $ 90,000,000