Quarterly report pursuant to Section 13 or 15(d)

Convertible Instruments - Additional Information (Detail)

v3.10.0.1
Convertible Instruments - Additional Information (Detail)
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Nov. 15, 2018
USD ($)
$ / shares
Jun. 26, 2018
USD ($)
$ / shares
Jan. 31, 2018
USD ($)
$ / shares
shares
Nov. 30, 2018
USD ($)
$ / shares
shares
Nov. 30, 2018
USD ($)
$ / shares
shares
Nov. 30, 2017
USD ($)
Nov. 30, 2018
USD ($)
$ / shares
shares
Nov. 30, 2017
USD ($)
May 31, 2018
USD ($)
$ / shares
shares
May 31, 2010
USD ($)
$ / shares
shares
Aug. 31, 2018
USD ($)
Jun. 07, 2018
shares
Aug. 24, 2017
shares
Aug. 23, 2017
shares
Apr. 30, 2010
shares
Class of Stock [Line Items]                              
Common stock, shares authorized | shares       600,000,000 600,000,000   600,000,000   375,000,000     450,000,000 375,000,000 350,000,000 100,000,000
Common stock, par value | $ / shares       $ 0.001 $ 0.001   $ 0.001   $ 0.001            
Debt discount                 $ 0   $ 626,242        
Amortization of debt discount         $ 52,954 $ 728,843 $ 117,534 $ 1,172,995              
Amortization of debt issuance costs         10,411 168,429 19,589 282,129              
Proceeds from sale of common stock and warrant             23,463,585 7,050,651              
Interest expense         143,617 $ 105,384 248,247 180,673              
Extinguishment loss         (1,519,603)   (1,519,603)                
Net carrying value of note       $ 5,596,974 5,596,974   5,596,974   0   $ 5,073,758        
Conversion of Preferred Stock to Common Stock                              
Class of Stock [Line Items]                              
Undeclared dividend             205,000   199,000            
Accrued dividend       410,000 410,000   410,000   $ 387,000            
Short-Term Convertible Notes                              
Class of Stock [Line Items]                              
Conversion price | $ / shares                 $ 0.75            
Convertible note, aggregate principal     $ 6,000,000           $ 4,890,000            
Convertible note maturity date     Jan. 31, 2018           Jan. 31, 2018            
Convertible notes, interest rate                 7.00%            
Common stock warrants to purchase shares | shares     7,718,010                        
Exercise price of warrants, per share | $ / shares     $ 0.75                        
Debt discount       0 0   0   $ 0            
Payment obligation against which common stock issued     $ 5,788,500                        
Accrued but unpaid interest     $ 243,000                        
Number of shares to be sold | shares     12,062,728                        
Sale of Stock, Price Per Share | $ / shares     $ 0.50                        
Proceeds from sale of common stock and warrant     $ 6,000,000                        
Repayment of note     $ 259,000       0   250,000            
Interest expense             0 75,000              
Net carrying value of note       $ 0 $ 0   $ 0   0            
Short-Term Convertible Notes | Investor Warrants                              
Class of Stock [Line Items]                              
Common stock warrants to purchase shares | shares       4,025,656 4,025,656   4,025,656                
Exercise price of warrants, per share | $ / shares       $ 1.00 $ 1.00   $ 1.00                
Term of warrants       5 years                      
Short-Term Convertible Notes | Detachable Common Stock Warrants                              
Class of Stock [Line Items]                              
Debt discount       $ 600,000 $ 600,000   $ 600,000   1,500,000            
Amortization of debt discount             117,500 1,200,000              
Unamortized issuance costs                 $ 400,000            
Amortization of debt issuance costs             0 300,000              
Note                              
Class of Stock [Line Items]                              
Convertible notes, interest rate   10.00%                          
Debt discount       600,000 600,000   600,000                
Amortization of debt discount             118,000 0              
Unamortized issuance costs       100,000 100,000   100,000                
Amortization of debt issuance costs             20,000 0              
Interest expense             248,000 $ 0              
Convertible promissory note maturity period   2 years                          
Convertible promissory note principle amount   $ 5,700,000                          
Proceeds from convertible promissory note   $ 5,000,000                          
Common stock conversion price | $ / shares $ 0.55 $ 0.55                          
Convertible promissory note maximum redemption amount $ 350,000 $ 350,000                          
Convertible promissory note redemption description Effective November 15, 2018, the Note was amended to allow the Investor to redeem the monthly redemption amount of $350,000 in cash or stock, at the lesser of (i) $0.55, or (ii) the lowest closing bid price of the Company’s common stock during the 20 days prior to the conversion, multiplied by a conversion factor of 85%. The Investor may redeem any portion of the Note, at any time after six months from the issue date upon five trading days' notice, subject to a maximum monthly redemption amount of $350,000.                          
Consecutive trading days   5                          
Terms of conversion   1.5                          
Conversion Factor 85.00%                            
Common stock conversion closing bid price period 20 days                            
Extinguishment loss             1,500,000                
Net carrying value of note       5,400,000 5,400,000   5,400,000                
Fair value of Note       $ 6,900,000 $ 6,900,000   $ 6,900,000                
Common Stock                              
Class of Stock [Line Items]                              
Number of common shares issued upon conversion of preferred stock | shares       10 10   10                
Conversion price | $ / shares       $ 0.50 $ 0.50   $ 0.50                
Series B Convertible Preferred Stock                              
Class of Stock [Line Items]                              
Series B Convertible preferred stock, shares issued | shares       92,100 92,100   92,100   92,100 400,000          
Preferred Stock, Share issuance price | $ / shares                   $ 5.00          
Cash proceeds                   $ 2,009,000          
Series B Convertible preferred stock, shares outstanding | shares       92,100 92,100   92,100   92,100            
Constructive dividend to Preferred stock holders             $ 6,000,000                
Liquidation preference on common shares | $ / shares       $ 5.00 $ 5.00   $ 5.00                
Dividends are payable to preferred stock holders | $ / shares             0.25                
Convertible preferred stock, par value | $ / shares       $ 0.001 $ 0.001   $ 0.001   $ 0.001 $ 0.001