Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Detail)

v3.6.0.2
Subsequent Events - Additional Information (Detail)
 1 Months Ended 6 Months Ended
Dec. 12, 2016
USD ($)
Warrants
$ / shares
shares
Sep. 30, 2016
$ / shares
shares
Nov. 30, 2016
USD ($)
$ / shares
shares
Nov. 30, 2015
USD ($)
Subsequent Event [Line Items]        
Proceeds from sale of common stock and warrants | $     $ 10,729,500 $ 12,941,248
Securities Purchase Agreement        
Subsequent Event [Line Items]        
Number of shares to be sold   13,333,334    
Purchase price, per share | $ / shares   $ 0.75    
Common stock warrants covering common shares   6,666,667 6,666,667  
Class of warrants, exercise price | $ / shares   $ 1.00 $ 1.00  
Term of warrants   5 years 5 years  
Subsequent Event        
Subsequent Event [Line Items]        
Common stock warrants covering common shares 6,310,667      
Class of warrants, exercise price | $ / shares $ 1.00      
Number of different classes of warrants issued | Warrants 2      
Warrants exercisable date 2016-10      
Extended expiration date on warrants May 30, 2017      
Expiration date on participation in extension Jan. 11, 2017      
Subsequent Event | Warrant 1        
Subsequent Event [Line Items]        
Common stock warrants covering common shares 186,667      
Warrants exercisable date 2016-12      
Subsequent Event | Warrant 2        
Subsequent Event [Line Items]        
Common stock warrants covering common shares 160,000      
Date of warrants exercisable Jan. 15, 2017      
Subsequent Event | Securities Purchase Agreement        
Subsequent Event [Line Items]        
Purchase price, per share | $ / shares $ 0.75      
Proceeds from sale of common stock and warrants | $ $ 3,000,000      
Class of warrants, exercise price | $ / shares $ 1.00      
Term of warrants 5 years      
Subsequent Event | Securities Purchase Agreement | Maximum        
Subsequent Event [Line Items]        
Number of shares to be sold 4,000,000      
Common stock warrants covering common shares 2,000,000