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

Summary of Significant Accounting Policies - Additional Information (Detail)

v2.4.0.8
Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
 3 Months Ended 6 Months Ended 7 Months Ended 12 Months Ended 115 Months Ended 121 Months Ended
Nov. 30, 2013
Nov. 30, 2012
Nov. 30, 2013
Nov. 30, 2012
May 31, 2004
May 31, 2013
May 31, 2012
May 31, 2011
May 31, 2010
May 31, 2009
May 31, 2008
May 31, 2007
May 31, 2006
May 31, 2005
May 31, 2013
Nov. 30, 2013
Class of Stock [Line Items]                                
Net loss $ 3,587,593 $ 1,908,486 $ 6,161,144 $ 4,723,652 $ 345,914 $ 9,568,301 $ 7,474,224 $ 3,719,688 $ 3,359,865 $ 1,306,004 $ 1,193,684 $ 2,610,070 $ 2,053,944 $ 777,083 $ 32,400,907 $ 38,562,054
Accumulated deficit 40,163,966   40,163,966     34,002,819                 34,002,819 40,163,966
Working capital deficit 7,973,301   7,973,301     2,388,138                 2,388,138 7,973,301
Estimated future unvested option forfeitures     0.00%     0.00%                    
Preferred Stock Shares authorized to be issued           5,000,000                 5,000,000  
Deferred offering costs 96,929   96,929     96,930 677,327               96,930 96,929
Common stock options and warrants to purchase 95,100   95,100     95,100 98,900               95,100 95,100
Common stock options and warrants to purchase     34,366,833 17,968,340   18,146,938 10,327,664               18,146,938  
Face amount of notes 7,221,250   7,221,250     6,588,250                 6,588,250 7,221,250
Additional common shares if convertible debt is converted to common stock     6,182,179     8,106,282                    
Unrecognized benefits 0 0 0 0   0 0               0 0
Direct costs associated with the convertible notes     120,000                          
Amortization of deferred offering costs 96,668   116,668                         116,668
Deferred finance costs, current 3,332   3,332                         3,332
Minimum
                                
Class of Stock [Line Items]                                
Fixed conversion prices range           $ 0.65                 $ 0.65  
Maximum
                                
Class of Stock [Line Items]                                
Fixed conversion prices range           $ 0.75                 $ 0.75  
Convertible Debt
                                
Class of Stock [Line Items]                                
Face amount of notes 4,621,250   4,621,250     6,021,250                 6,021,250 4,621,250
Equity Securities
                                
Class of Stock [Line Items]                                
Deferred offering costs 2,084,000   2,084,000                         2,084,000
Stock Rescission Liability
                                
Class of Stock [Line Items]                                
Deferred offering costs $ 97,000   $ 97,000     $ 97,000                 $ 97,000 $ 97,000
Series B convertible preferred stock
                                
Class of Stock [Line Items]                                
Common stock options and warrants to purchase 95,100   95,100     95,100                 95,100 95,100
Common shares issued upon conversion of preferred stock     951,000     951,000                    
Series B Convertible Preferred Stock
                                
Class of Stock [Line Items]                                
Preferred Stock Shares authorized to be issued 400,000   400,000     400,000 400,000               400,000 400,000