Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Detail)

v3.5.0.2
Subsequent Events - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
Sep. 12, 2016
Aug. 31, 2016
May 31, 2016
Subsequent Event [Line Items]      
Par value of common stock   $ 0.001 $ 0.001
Subsequent Event | Placement Agent      
Subsequent Event [Line Items]      
Warrants to purchase common shares, shares 1,066,667    
Class of warrants, exercise price $ 0.825    
Term of warrants 5 years    
Percentage of shares, issued as warrants 8.00%    
Subsequent Event | Securities Purchase Agreement      
Subsequent Event [Line Items]      
Number of shares to be sold 13,333,334    
Par value of common stock $ 0.001    
Purchase price, per share $ 0.75    
Warrants to purchase common shares, shares 6,666,667    
Class of warrants, exercise price $ 1.00    
Term of warrants 5 years    
Proceeds from issuance of common shares $ 9    
Placement agent's fees, as a percentage of gross proceeds 8.00%