Quarterly report pursuant to Section 13 or 15(d)

Convertible Instruments - Additional Information (Detail)

v3.19.3
Convertible Instruments - Additional Information (Detail)
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Jan. 31, 2019
USD ($)
$ / shares
shares
Jun. 26, 2018
USD ($)
$ / shares
Jan. 30, 2019
USD ($)
Nov. 15, 2018
USD ($)
$ / shares
Aug. 31, 2019
USD ($)
$ / shares
shares
Aug. 31, 2018
USD ($)
Feb. 28, 2019
USD ($)
May 31, 2019
USD ($)
$ / shares
shares
May 31, 2010
USD ($)
$ / shares
shares
Aug. 29, 2019
shares
Mar. 20, 2019
$ / shares
shares
May 31, 2018
USD ($)
Apr. 30, 2010
shares
Class of Stock [Line Items]                          
Preferred Stock, Share issuance price | $ / shares               $ 1,000          
Common stock, shares authorized | shares         700,000,000     700,000,000         100,000,000
Convertible preferred stock, par value | $ / shares         $ 0.001     $ 0.001          
Amortization of debt discount         $ 1,030,151 $ 64,580              
Number of shares to be sold | shares         3,014,181                
Proceeds from sale of common stock and warrant         $ 2,255,800 8,499,300              
Repayment of note         2,460,000                
Interest expense         404,020 104,630              
Proceeds from convertible promissory note     $ 5,000,000                    
Conversion of Preferred Stock to Common Stock                          
Class of Stock [Line Items]                          
Undeclared dividend         227,000     $ 216,000          
Accrued dividend         454,000     $ 432,000          
Short-Term Convertible Notes                          
Class of Stock [Line Items]                          
Conversion price | $ / shares               $ 0.50          
Convertible note, aggregate principal               $ 5,500,000          
Convertible notes, interest rate               10.00%          
Common stock warrants to purchase shares | shares 972,000                        
Unamortized discount         439,000             $ 1,470,000  
Sale of Stock, Price Per Share | $ / shares $ 0.50                        
Repayment of note $ 3,000,000                        
Net carrying value of note         4,901,000             3,586,000  
Short-Term Convertible Notes | Investor Warrants                          
Class of Stock [Line Items]                          
Common stock warrants to purchase shares | shares               5,460,000          
Exercise price of warrants, per share | $ / shares               $ 0.30          
Short-Term Convertible Notes | Detachable Common Stock Warrants                          
Class of Stock [Line Items]                          
Unamortized discount               $ 4,200,000          
Amortization of debt discount         1,030,000 60,000              
Unamortized issuance costs         0.3                
Note                          
Class of Stock [Line Items]                          
Convertible notes, interest rate   10.00%                      
Interest expense         162,000 104,000 $ 1,500,000            
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   The Investor may redeem any portion of the June 2018 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   Effective November 15, 2018, the June 2018 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%                  
Terms of conversion   1.5                      
Convertible note, redeemed amount         1,005,000                
Outstanding balance of convertible note including accrued unpaid interest         3,700,000                
Fair value of Note         6,900,000                
Net carrying value of note               5,400,000          
2019 Short Term Convertible Notes                          
Class of Stock [Line Items]                          
Unamortized issuance costs         120,000             $ 404,000  
Proceeds from sale of common stock and warrant             $ 583,200            
Interest expense         $ 138,000     $ 0          
2019 Short Term Convertible Notes | Investor Warrants                          
Class of Stock [Line Items]                          
Term of warrants               5 years          
January 2019 Note [Member]                          
Class of Stock [Line Items]                          
Convertible notes, interest rate         10.00%                
Common stock warrants to purchase shares | shares               5,000,000          
Exercise price of warrants, per share | $ / shares               $ 0.30          
Unamortized discount         $ 600,000                
Unamortized issuance costs         100,000                
Interest expense         104,000 $ 0              
Convertible promissory note principle amount         5,700,000                
Proceeds from convertible promissory note         $ 5,000,000     $ 5,000,000          
Common stock conversion price | $ / shares         $ 0.50     $ 0.50          
Convertible promissory note redemption description               The Investor may redeem any portion of the January 2019 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. The monthly redemption amount may be paid in cash or stock, at the Company’s election, at the lesser of (i) $0.50, 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%          
Company Reserves Shares For Future Conversition | shares               20,000,000          
Common Stock                          
Class of Stock [Line Items]                          
Number of common shares issued upon conversion of preferred stock | shares               10          
Conversion price | $ / shares         $ 0.50                
Series B Convertible Preferred Stock                          
Class of Stock [Line Items]                          
Series C Convertible preferred stock, shares issued | shares | shares         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 | shares         92,100     92,100          
Constructive dividend to Preferred stock holders         $ 6,000,000                
Liquidation preference on common shares | $ / shares         $ 5.00                
Dividends are payable to preferred stock holders | $ / shares         0.25                
Convertible preferred stock, par value | $ / shares         $ 0.001     $ 0.001 $ 0.001        
Series C Convertible Preferred Stock                          
Class of Stock [Line Items]                          
Series C Convertible preferred stock, shares issued | shares | shares         5,000     3,246   1,754 3,246    
Preferred Stock, Share issuance price | $ / shares         $ 1,000                
Cash proceeds         $ 1,542,545     $ 3,083,700          
Series B Convertible preferred stock, shares outstanding | shares | shares         5,000     3,246          
Common stock, shares authorized | shares                     5,000    
Convertible preferred stock, par value | $ / shares         $ 0.001     $ 0.001     $ 0.001    
Placement agent fee         $ 211,455     $ 162,300          
Preferred Stock, Dividend Rate, Percentage         10.00%                
Convertible Preferred Stock Conversion Price | $ / shares         $ 0.50                
Accrued dividends         $ 148,179     $ 37,351          
Accrued dividend Shares | shares         296,000