Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Additional information (Details)

v3.20.2
Stockholders' Equity - Additional information (Details)
1 Months Ended 3 Months Ended 9 Months Ended
Jul. 07, 2020
USD ($)
$ / shares
shares
Jul. 01, 2020
$ / shares
Jun. 11, 2020
USD ($)
$ / shares
shares
Jun. 04, 2020
shares
May 26, 2020
USD ($)
$ / shares
shares
May 20, 2020
USD ($)
$ / shares
shares
Mar. 25, 2020
USD ($)
shares
Dec. 17, 2019
Jul. 07, 2020
USD ($)
$ / shares
Mar. 22, 2020
USD ($)
Jan. 31, 2020
$ / shares
shares
Dec. 31, 2019
$ / shares
shares
May 31, 2020
USD ($)
$ / shares
shares
May 31, 2019
USD ($)
May 31, 2020
USD ($)
$ / shares
shares
May 31, 2019
USD ($)
Aug. 31, 2019
$ / shares
shares
Preferred stock, per share | $ / shares                     $ 0.0001   $ 0.0001   $ 0.0001   $ 0.0001
Compensation expense | $             $ 62,100,000           $ 150,000 $ (5,000) $ 895,000 $ 154,000  
Preferred Stock Shares Options Outstanding and Exercisable                             12,134,560    
Fair value exercise price per share | $ / shares                         $ 0.0001   $ 0.0001    
Proceeds from exercise of warrants                             (45,698)    
Proceeds from exercise of warrants | $                             $ 33,000 $ 660,000  
Value | $                         $ 10,332,000   $ 10,332,000    
Exercise price of stock options granted (in dollars per share) | $ / shares                             $ 7.91    
Number of shares outstanding, Beginning balance                                 50,749
Expected maturity period                             3 years 9 months 7 days    
Risk-free interest rate                             0.47%    
Volatility                             134.00%    
Shares conversion ratio             1 0.025             1    
Reverse split description                       On December 17, 2019, the Company effected a 1 for 40 reverse stock split. All common stock and common stock equivalents are presented retroactively to reflect the reverse split.          
Reverse stock split             1 0.025             1    
Debt amount qualified for conversion | $                   $ 1,047,000              
Common stock shares issued                         3,857,316   3,857,316    
Shares issued for services | $                             $ 75,000    
Issued                             1,840,773    
Warrants outstanding                             1,896,209    
Price per unit | $ / shares                         $ 3.62   $ 3.62    
Subsequent Event [Member]                                  
Exercise price of stock options granted (in dollars per share) | $ / shares   $ 5.40                              
Amended March 2019 Notes Warrants [Member]                                  
Exercise price of stock options granted (in dollars per share) | $ / shares                             $ 40.00    
Issued                             53,273    
Warrants outstanding                       13,015     66,288    
Amended March 2019 Notes Warrants [Member] | Minimum                                  
Preferred stock, per share | $ / shares                       $ 40.00          
Amended March 2019 Notes Warrants [Member] | Maximum                                  
Preferred stock, per share | $ / shares                       $ 70.00          
May 2020 Warrant [Member]                                  
Warrants outstanding         111,108                        
Percentage on aggregate number of shares of common stock         5.00%                        
Price per unit | $ / shares         $ 5.94                        
Percentage of warrants exercisable price on offering price         110.00%                        
May 2020 Warrant [Member] | Minimum                                  
Warrants term         6 months                        
May 2020 Warrant [Member] | Maximum                                  
Warrants term         5 years                        
June 2018 Notes Warrants [Member]                                  
Exercise price of stock options granted (in dollars per share) | $ / shares                             $ 40.00    
Warrants outstanding                             6,276    
Director [Member]                                  
Shares issued for services rendered                             856    
Shares issued for services | $                             $ 75,000    
Scott W Absher [Member]                                  
Number option additionally available for grant to founder shareholders                     12,500,000            
Stephen Holmes [Member]                                  
Number option additionally available for grant to founder shareholders                     12,500,000            
Exchange Agreement [Member]                                  
Stock Issued During Period, Shares, Conversion of Convertible Securities                     24,049            
Shares issued in exchange of debt                     24,049            
Convertible Notes Payable [Member]                                  
Stock Issued During Period, Shares, Conversion of Convertible Securities                             628,353    
Shares issued in exchange of debt                             628,353    
Debt amount qualified for conversion | $                             $ 6,060,000    
Debt default interest | $                         $ 178,000   $ 178,000    
Senior Convertible Notes Holder                                  
Shares issued for services rendered                             82,653    
Shares issued for services | $                             $ 552,000    
March 2019 Convertible Notes [Member]                                  
Amount of debt exchanged | $                         $ 2,700,000   $ 2,700,000    
December 2019 [Member]                                  
Common stock shares issued                         21,750   21,750    
Value of shares issued | $                         $ 200,000   $ 200,000    
Amount of debt exchanged | $                         $ 2,900,000   $ 2,900,000    
Preferred Stock                                  
Shares conversion ratio                     1       1    
Reverse stock split                     1       1    
Preferred Stock | May 2020 Warrant [Member]                                  
Price per unit | $ / shares                         $ 2.52   $ 2.52    
Preferred Stock | Scott W Absher [Member] | Subsequent Event [Member]                                  
Preferred options Exercised       12,500,000                          
Number of options available for grant to founder shareholders       12,500,000                          
Stock Option | Scott W Absher and Stephen Holmes                                  
Number of options available for grant to founder shareholders                     50,000,000            
Stock Option | Preferred Stock                                  
Convertible preferred stock             24,634,560                    
Common Share Units [Member] | May 2020 Warrant [Member]                                  
Number of Shares of Common Stock to be Purchased Accompanied by Common Warrant | $           0.5                      
Units issued           166,500                      
Common Share Units [Member] | Scott W Absher [Member] | Subsequent Event [Member]                                  
Shares issued upon conversion       12,500,000                          
Common shares lock up period       2 years                          
Warrant [Member]                                  
Shares issued for services rendered                             6,275    
Shares issued for services | $                             $ 33,000    
Exercise price of warrants | $ / shares         $ 0.01                        
Price per unit | $ / shares         $ 5.39                        
Warrants to acquire shares of common stock         323,310                        
Underwritten Public Offering [Member]                                  
Shares of common stock issued                             2,222,160    
Gross proceeds from issuance of shares | $         $ 12,000,000                        
Underwritten Public Offering [Member] | May 2020 Warrant [Member]                                  
Exercise price of warrants | $ / shares           $ 5.40                      
Gross proceeds from issuance of shares | $         12,000,000                        
Offering costs | $         $ 1,700,000                        
Warrants to acquire shares of common stock           1,277,580                      
Underwritten Public Offering [Member] | Common Share Units [Member]                                  
Price per share | $ / shares           $ 5.40                      
Underwritten Public Offering [Member] | Common Share Units [Member] | May 2020 Warrant [Member]                                  
Shares of common stock issued           1,898,850                      
Exercise price of warrants | $ / shares                         $ 5.40   $ 5.40    
Underwritten Public Offering [Member] | Warrant [Member]                                  
Price per share | $ / shares           $ 5.399                      
Underwritten Public Offering [Member] | Warrant [Member] | May 2020 Warrant [Member]                                  
Shares of common stock issued           323,310                      
Overallotment                                  
Gross proceeds from issuance of shares | $                 $ 1,350,000                
Overallotment | May 2020 Warrant [Member] | Subsequent Event [Member]                                  
Shares of common stock issued     166,500                            
Gross proceeds from issuance of shares | $ $ 450,000                                
Proceeds from issuance of units | $     $ 900,000                            
Units issued 83,840                                
Price per unit | $ / shares     $ 5.40                            
Overallotment | Common Share Units [Member] | May 2020 Warrant [Member] | Subsequent Event [Member]                                  
Price per unit | $ / shares $ 5.40               $ 5.40