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Commitments and Contingencies - Additional Information (Detail)
 1 Months Ended 3 Months Ended
Aug. 22, 2012
shares
Sep. 30, 2012
Aug. 31, 2012
USD ($)
Sep. 30, 2015
USD ($)
ft²
Jun. 30, 2015
USD ($)
Purchase Commitment, Excluding Long-term Commitment [Line Items]          
Lease expiration month and year       2016-06  
Lease arrangement rent area, square feet | ft²       8,800  
Lease rental rate       $ 27,000  
Future minimum payment next year       242,000  
Issuance of common stock to acquire intellectual property and technology rights     $ 500,000    
Issuance of common stock to purchase asset, shares | shares 195,756        
Future aggregate milestone payments     75,200,000    
First milestone payment     200,000    
Common stock value       0 $ 0
Accrued potential future payments       $ 100,000  
Percentage of Purchase Requirement   100.00%      
License and supply agreement notice period   90 days      
Phase Three Clinical Trial          
Purchase Commitment, Excluding Long-term Commitment [Line Items]          
Common stock value     $ 500,000