General form of registration statement for all companies including face-amount certificate companies

Private Securities Offerings - Additional Information (Detail)

v3.3.1.900
Private Securities Offerings - Additional Information (Detail) - USD ($)
 6 Months Ended 12 Months Ended
Oct. 23, 2013
Nov. 30, 2015
May. 31, 2015
Sep. 21, 2015
Jun. 11, 2015
Feb. 06, 2015
Sep. 26, 2014
May. 31, 2014
Equity and Equity Units Offering Disclosure [Line Items]                
Exercise price of warrants, per share         $ 1.02      
Convertible notes     $ 4,862,257     $ 1,500,000 $ 2,000,000  
Common stock, par value   $ 0.001 $ 0.001        
Private Equity Offering                
Equity and Equity Units Offering Disclosure [Line Items]                
Units sold at private equity offering 11,153,850 17,254,952            
Price per unit $ 1.30              
Proceeds from units sold at private equity offering $ 14,500,000              
Number of common stock per unit 2              
Number of shares issued     20,989,494          
Warrant to purchase common share 1              
Exercise price of warrants, per share $ 0.75 $ 0.75 $ 0.75          
Number of common stock warrants issued     11,153,850          
Common stock shares purchased, percentage   50.00%            
Term of warrants   5 years            
Common stock, par value   $ 0.001            
Warrants to purchase common shares, shares   11,724,092            
Private Equity Offering | Placement Agent                
Equity and Equity Units Offering Disclosure [Line Items]                
Exercise price of warrants, per share   $ 0.75            
Term of warrants   5 years            
Warrants to purchase common shares, shares   1,716,643            
Private Equity Offering | Warrants Issued                
Equity and Equity Units Offering Disclosure [Line Items]                
Warrants to purchase common shares, shares   8,627,450            
Investor Warrants | Private Equity Offering                
Equity and Equity Units Offering Disclosure [Line Items]                
Warrants to purchase common shares, shares   10,344,092            
Short-Term Convertible Notes | 6-Month Unsecured Convertible Promissory Notes                
Equity and Equity Units Offering Disclosure [Line Items]                
Convertible notes     $ 3,981,050          
Convertible note conversion price per share     $ 0.75 $ 0.675        
Convertible notes term     6 months          
Convertible notes, interest rate     7.00%          
Common stock shares purchased, percentage     50.00%          
Common stock, par value     $ 0.001          
Short-Term Convertible Notes | 6-Month Unsecured Convertible Promissory Notes | Investor Warrants                
Equity and Equity Units Offering Disclosure [Line Items]                
Exercise price of warrants, per share     $ 0.75          
Common stock shares purchased, percentage     20.00%          
Term of warrants     5 years          
Common stock, par value     $ 0.001          
Warrants to purchase common shares, shares     1,061,586