Quarterly report pursuant to Section 13 or 15(d)

Convertible Instruments - Additional Information (Detail)

v3.20.1
Convertible Instruments - Additional Information (Detail)
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Jan. 31, 2020
USD ($)
$ / shares
shares
Jan. 28, 2020
USD ($)
$ / shares
shares
Dec. 31, 2019
USD ($)
$ / shares
shares
Dec. 16, 2019
USD ($)
Jun. 26, 2018
USD ($)
$ / shares
Jan. 30, 2019
USD ($)
Nov. 15, 2018
Feb. 29, 2020
USD ($)
$ / shares
shares
Nov. 30, 2019
USD ($)
$ / shares
shares
Feb. 28, 2019
USD ($)
Feb. 29, 2020
USD ($)
$ / shares
shares
Feb. 28, 2019
USD ($)
May 31, 2019
USD ($)
$ / shares
shares
May 31, 2010
USD ($)
$ / shares
shares
Oct. 11, 2019
shares
Sep. 30, 2019
USD ($)
Aug. 31, 2019
shares
Aug. 29, 2019
shares
Mar. 20, 2019
$ / shares
shares
Apr. 30, 2010
shares
Class of Stock [Line Items]                                        
Common stock, shares authorized | shares               700,000,000     700,000,000   700,000,000              
Convertible preferred stock, par value | $ / shares               $ 0.001     $ 0.001   $ 0.001              
Common stock warrants to purchase shares | shares                 200,000                      
Exercise price of warrants, per share | $ / shares                 $ 0.45                      
Number of shares to be sold | shares                     9,462,547                  
Interest expense               $ 6,038,245   $ 335,595 $ 6,995,055 $ 583,842                
Proceeds from convertible promissory note           $ 5,000,000                            
Common stock conversion price | $ / shares         $ 0.55                              
Terms of conversion         1.5                              
Interest paid                 $ 875,000   8,689                  
Notes Payable Repayment                     1,725,000                
Debt outstanding amount               $ 3,916,479     $ 3,916,479   $ 3,586,035              
Preferred stock, shares authorized | shares               5,000,000     5,000,000   5,000,000              
Common stock, shares issued | shares               471,092,106     471,092,106   329,554,763              
Conversion of Preferred Stock to Common Stock                                        
Class of Stock [Line Items]                                        
Undeclared dividend                     $ 239,000   $ 216,000              
Accrued dividend               $ 467,000     467,000   $ 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%              
Short-Term Convertible Notes | Investor Warrants                                        
Class of Stock [Line Items]                                        
Exercise price of warrants, per share | $ / shares                 $ 0.30                      
Note                                        
Class of Stock [Line Items]                                        
Convertible notes, interest rate         10.00%                              
Interest expense                     450,000 440,000                
Convertible promissory note principle amount         $ 5,700,000                              
Proceeds from convertible promissory note         5,000,000                              
Convertible promissory note maximum redemption amount         $ 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%                          
Convertible note, redeemed amount                     5,000,000                  
Fair value of Note               $ 6,900,000     6,900,000                  
Net carrying value of note                         $ 5,400,000              
Note | Tranche One [Member]                                        
Class of Stock [Line Items]                                        
Interest expense                     1,500,000                  
2019 Short Term Convertible Notes                                        
Class of Stock [Line Items]                                        
Convertible note, aggregate principal                               $ 200,000        
Interest expense                     $ 380,000 75,000                
Common stock conversion price | $ / shares $ 0.50   $ 0.50                                  
Outstanding balance of convertible note including accrued unpaid interest $ 512,063   $ 549,912                                  
Notes Payable Repayment                 $ 700,000                      
Debt outstanding amount                               5,900,000        
Noncash inducement interest expense                 $ 300,000                      
Common stock, shares issued | shares 1,025,205   1,099,823                                  
2019 Short Term Convertible Notes | Tranche One [Member]                                        
Class of Stock [Line Items]                                        
Debt outstanding amount                               1,100,000        
January 2019 Note [Member]                                        
Class of Stock [Line Items]                                        
Convertible notes, interest rate               10.00%     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     $ 600,000                  
Unamortized issuance costs               100,000     $ 100,000                  
Number of shares to be sold | shares                     10,842,255                  
Interest expense                     $ 6,170,000 $ 69,000                
Convertible promissory note principle amount               $ 5,700,000     5,700,000                  
Proceeds from convertible promissory note                     $ 5,000,000                  
Common stock conversion price | $ / shares                     $ 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%              
Convertible note, redeemed amount       $ 350,000             $ 6,271,000                  
Company Reserves Shares For Future Conversition | shares                         20,000,000              
Interest paid                     $ 850,000                  
Convertible Promissory Notes [Member]                                        
Class of Stock [Line Items]                                        
Common stock warrants to purchase shares | shares                 4,750,000                      
Term of warrants                 5 years                      
Common Stock                                        
Class of Stock [Line Items]                                        
Conversion price | $ / shares               $ 0.50     $ 0.50                  
Series B Convertible Preferred Stock                                        
Class of Stock [Line Items]                                        
Preferred stock, shares issued | shares               92,100     92,100   92,100              
Preferred Stock, Share issuance price | $ / shares               $ 5.00     $ 5.00                  
Cash proceeds                           $ 2,009,000            
Series B Convertible preferred stock, shares outstanding | shares               92,100     92,100   92,100              
Common stock, shares authorized | shares                                       100,000,000
Constructive dividend to Preferred stock holders                     $ 6,000,000                  
Liquidation preference on common shares | $ / shares               $ 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            
Preferred stock, shares authorized | shares               400,000     400,000   400,000 400,000            
Series C Convertible Preferred Stock                                        
Class of Stock [Line Items]                                        
Preferred stock, shares issued | shares               8,203     8,203   3,246   2.788     1.754 3.246  
Preferred Stock, Share issuance price | $ / shares               $ 1.000     $ 1.000                  
Cash proceeds                     $ 1,542,545   $ 3,083,700              
Series B Convertible preferred stock, shares outstanding | shares               8.203     8.203   3.246              
Common stock, shares authorized | shares                                     5.000  
Convertible preferred stock, par value | $ / shares               $ 0.001     $ 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     $ 0.50                  
Accrued dividends               $ 564,781     $ 564,781   $ 37,351              
Accrued dividend Shares | shares               1,005,239     1,005,239                  
Preferred stock, shares authorized | shares   8.203           8,203     8,203   8,203   20.000   5.000      
Series C Convertible Preferred Stock | 2019 Short Term Convertible Notes | Tranche Two [Member]                                        
Class of Stock [Line Items]                                        
Debt outstanding amount                               $ 4,100,000        
Series D Convertible Preferred Stock                                        
Class of Stock [Line Items]                                        
Preferred stock, shares issued | shares   7,570           7,570     7,570   0              
Preferred Stock, Share issuance price | $ / shares   $ 1,000                                    
Cash proceeds   $ 7,565,355                                    
Series B Convertible preferred stock, shares outstanding | shares   7,570           7,570     7,570   0              
Dividends are payable to preferred stock holders | $ / shares   $ 0.50                                    
Convertible preferred stock, par value | $ / shares   $ 0.001           $ 0.001     $ 0.001   $ 0.001              
Placement agent fee   $ 4,645                                    
Preferred Stock, Dividend Rate, Percentage   10.00%                                    
Convertible Preferred Stock Conversion Price | $ / shares   $ 0.80                                    
Accrued dividends   $ 62,219                                    
Accrued dividend Shares | shares   124,440                                    
Preferred stock, shares authorized | shares   11,737           11,737     11,737   11,737