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Subsequent Event - Additional Information (Detail) - USD ($)
 2 Months Ended 12 Months Ended
Aug. 19, 2015
Aug. 31, 2015
Jun. 30, 2015
Jun. 30, 2014
Subsequent Event [Line Items]        
Proceeds from convertible debt     $ 7,400,000 $ 4,600,000
Operating lease period     37 months  
Lease initial base rent per month     $ 2,900  
Total base rent over the term of the lease     $ 112,000  
Convertible Promissory Notes [Member]        
Subsequent Event [Line Items]        
Debt conversion description     The principal and accrued interest under the notes will automatically convert into a number of shares of such equity securities of the Company sold in such financing equal to 120% of the principal and accrued interest under such note divided by the lesser of (i) the lowest price paid by an investor in such financing or (ii) $4.63.  
Subsequent Event [Member]        
Subsequent Event [Line Items]        
Percentage of amount paid to placement agent based on notes sold   8.00%    
Percentage of warrant to purchase shares of common stock equal to proceeds of notes   8.00%    
Non refundable retainer fee   $ 20,000    
Warrant term of placement agent   5 years    
Warrant exercise price percentage equal to equity securities are sold   100.00%    
Operating lease period 37 months      
Lease initial base rent per month $ 8,500      
Total base rent over the term of the lease $ 318,000      
Subsequent Event [Member] | Convertible Promissory Notes [Member]        
Subsequent Event [Line Items]        
Aggregate principal amount   $ 5,200,000    
Debt instrument maturity date   Jan. 22, 2017    
Debt instrument maturity date, two   Feb. 11, 2017    
Debt instrument maturity date, three   Feb. 28, 2017    
Debt instrument maturity period   18 months    
Debt instrument maturity, extension period   6 months    
Debt instrument interest rate, increase during period   2.00%    
Convertible notes equal to percentage of common stock   120.00%    
Debt Instrument, convertible, Conversion price   $ 4.63    
Subsequent Event [Member] | Convertible Promissory Notes [Member] | If Converted within First Six Months [Member]        
Subsequent Event [Line Items]        
Debt instrument interest rate   8.00%    
Subsequent Event [Member] | Convertible Promissory Notes [Member] | If Not Converted within First Six Months [Member]        
Subsequent Event [Line Items]        
Debt instrument interest rate   12.00%    
Subsequent Event [Member] | Convertible Promissory Notes [Member] | If Not Registered, Shares of Common Stock Underlying Notes by Expiration of First Six Month Period [Member]        
Subsequent Event [Line Items]        
Debt instrument interest rate   14.00%    
Subsequent Event [Member] | Convertible Promissory Notes [Member] | Minimum [Member]        
Subsequent Event [Line Items]        
Proceeds from convertible debt   $ 5,000,000