Annual report pursuant to Section 13 and 15(d)

Subsequent Events - Additional Information (Detail)

v3.2.0.727
Subsequent Events - Additional Information (Detail) - Entity [Domain] - USD ($)
 12 Months Ended
Jun. 30, 2015
Jun. 23, 2015
Jun. 11, 2015
Jun. 01, 2015
May. 31, 2015
May. 31, 2014
Feb. 06, 2015
Sep. 26, 2014
May. 31, 2013
Subsequent Event [Line Items]                  
Warrant exercise price         $ 0.50       $ 0.75
Debt converted into shares         $ 4,221,250 $ 2,450,000      
Shares issued in debt conversion           2,087,717      
Alpha Venture Capital Partners, L.P.                  
Subsequent Event [Line Items]                  
Warrant exercise price         $ 0.50   $ 0.50 $ 0.50  
Subsequent Event                  
Subsequent Event [Line Items]                  
Warrant exercise price     $ 1.02            
Warrant exercise term     5 years            
Subsequent Event | Alpha Venture Capital Partners, L.P.                  
Subsequent Event [Line Items]                  
Warrant exercise price   $ 0.675              
Debt converted into shares   $ 3,535,627.15              
Shares issued in debt conversion   5,237,966              
Exercisable warrants, expire period   5 years              
Warrants to purchase shares of common stock   1,000,000              
Subsequent Event | Consultant                  
Subsequent Event [Line Items]                  
Number of common stock covered by warrant     200,000            
Percentage of warrants vested     50.00%            
Subsequent Event | Consultant | Vesting Schedule One                  
Subsequent Event [Line Items]                  
Warrants vesting month and year     2016-01            
Subsequent Event | Consultant | Vesting Schedule Two                  
Subsequent Event [Line Items]                  
Warrants vesting month and year     2017-01            
Subsequent Event | Financial Advisor                  
Subsequent Event [Line Items]                  
Number of common stock covered by warrant     10,000            
Subsequent Event | Clinical Research Organization                  
Subsequent Event [Line Items]                  
Number of common stock covered by warrant     170,000            
Warrants vesting month and year     2017-02            
Subsequent Event | Stock Options | Directors                  
Subsequent Event [Line Items]                  
Stock options granted, shares       350,000          
Stock options granted, exercise price       $ 0.975          
Stock options, vesting period       5 years          
Subsequent Event | Stock Options | Directors | Options vest quarterly                  
Subsequent Event [Line Items]                  
Stock options, vesting period       1 year          
Subsequent Event | Stock Options | Chairman of the board                  
Subsequent Event [Line Items]                  
Stock options granted, shares     250,000            
Stock options granted, exercise price     $ 0.97            
Stock options, vesting period     5 years            
Subsequent Event | Stock Options | 2 Officers                  
Subsequent Event [Line Items]                  
Stock options granted, shares 350,000                
Stock options granted, exercise price $ 0.90                
Stock options, vesting period 3 years                
Exercisable warrants, expire period 5 years                
Subsequent Event | Stock Options | Employee                  
Subsequent Event [Line Items]                  
Stock options granted, shares 50,000                
Stock options granted, exercise price $ 0.90                
Stock options, vesting period 3 years                
Exercisable warrants, expire period 5 years