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

Summary of Significant Accounting Policies - Loss per Common Share - Additional Information (Detail)

v3.3.1.900
Summary of Significant Accounting Policies - Loss per Common Share - Additional Information (Detail) - USD ($)
 6 Months Ended 12 Months Ended
Nov. 30, 2015
Nov. 30, 2014
May. 31, 2015
May. 31, 2014
Summary Of Significant Accounting Policies [Line Items]        
Common stock options and warrants to purchase 44,618,007 23,753,170 31,008,915 30,806,361
Additional common shares if convertible debt is converted to common stock     10,559,919  
Short-Term Convertible Notes        
Summary Of Significant Accounting Policies [Line Items]        
Face amount of notes     $ 7,531,050  
Series B Convertible Preferred Stock        
Summary Of Significant Accounting Policies [Line Items]        
Common stock options and warrants to purchase 95,100   95,100 95,100
Common shares issued upon conversion of preferred stock 951,000   951,000