Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Additional information (Details)

v3.21.2
Stockholders' Equity - Additional information (Details)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
May 17, 2021
USD ($)
$ / shares
shares
May 13, 2021
$ / shares
shares
Oct. 08, 2020
USD ($)
$ / shares
shares
Jun. 04, 2020
shares
May 26, 2020
USD ($)
Mar. 25, 2020
Jul. 07, 2020
USD ($)
Jan. 31, 2020
$ / shares
shares
May 31, 2021
$ / shares
shares
Nov. 30, 2020
shares
Aug. 31, 2020
$ / shares
shares
May 31, 2021
$ / shares
shares
Jun. 04, 2021
shares
Preferred stock, per share | $ / shares               $ 0.0001 $ 0.0001   $ 0.0001 $ 0.0001  
Exercise price (in dollars per share) | $ / shares                       $ 3.07  
Number of options available for grant to founder shareholders                         3,000,000
Shares conversion ratio           1              
Common stock shares issued                 23,234,646   16,902,146 23,234,646  
Exercise price of warrants | $ / shares $ 2.6675                        
Issued                       10,324,329  
Warrants Outstanding 247,423                        
Percentage on aggregate number of shares of common stock 7.00%                        
Gross proceeds from issuance of private placement | $ $ 12,000                        
Offering costs | $ $ 940                        
Percentage of warrants exercisable price on offering price 5.00%                        
securities purchase agreement                          
Shares of common stock issued   2,320,000                      
Price per share | $ / shares   $ 0.0001                      
Amended March 2019 Warrants                          
Exercise price (in dollars per share) | $ / shares                       $ 40.00  
Warrants Outstanding                       66,288  
June 2018 Notes Warrants                          
Exercise price (in dollars per share) | $ / shares                       $ 40.00  
Warrants Outstanding                       6,276  
October 2020 Common Warrants                          
Exercise price (in dollars per share) | $ / shares                       $ 3.30  
Warrants Outstanding     200,000                 2,300,000  
Percentage on aggregate number of shares of common stock     5.00%                    
Price per share | $ / shares     $ 3.30                    
Percentage of warrants exercisable price on offering price     110.00%                    
October 2020 Common Warrants | Minimum                          
Warrants term         6 months                
October 2020 Common Warrants | Maximum                          
Warrants term     5 years                    
May 2021 Underwriter Warrants                          
Exercise price (in dollars per share) | $ / shares                       $ 2.67  
Warrants Outstanding                       247,423  
May 2021 Common Warrants                          
Shares of common stock issued                       2,320,000  
Price per share | $ / shares                 $ 2.425     $ 2.425  
Combined offering price per share | $ / shares                 2.4249     2.4249  
Exercise price (in dollars per share) | $ / shares                       $ 2.43  
Common stock shares issued                 4,948,453     4,948,453  
Warrants Outstanding                       4,948,453  
May 2021 Common Warrants | securities purchase agreement                          
Shares issued upon exercise of warrants   2,320,000                      
Price per share | $ / shares   $ 2.425                      
May 2021 Prefunded Warrants                          
Shares of common stock issued                       2,628,453  
Exercise price (in dollars per share) | $ / shares $ 0.0001                     $ 0.00  
Warrants Outstanding                       2,628,453  
May 2021 Prefunded Warrants | securities purchase agreement                          
Shares issued upon exercise of warrants   2,628,453                      
Price per share | $ / shares   $ 2.4249                      
Prefunded warrants | securities purchase agreement                          
Exercise price of warrants | $ / shares   $ 0.0001                      
Number of share of common stock per warrant   2,628,453                      
Scott W Absher                          
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          
Preferred Stock                          
Preferred options Exercised                 0   294,490    
Preferred Stock Shares Options Outstanding and Exercisable                 11,827,570        
Shares conversion ratio               1   1      
Preferred Stock | Scott W Absher                          
Preferred options Exercised       12,500,000         12,500     12,500  
Shares issued upon conversion       12,500,000                  
Stock Option | Scott W Absher and Stephen Holmes                          
Number of options available for grant to founder shareholders               50,000,000          
Common Share Units [Member] | October 2020 Common Warrants                          
Shares of common stock issued                       4,000,000  
Price per share | $ / shares                 $ 3.00     $ 3.00  
Common Share Units [Member] | Scott W Absher                          
Shares issued upon conversion       12,500,000                  
Common shares lock up period       2 years                  
Warrant [Member]                          
Exercise price (in dollars per share) | $ / shares                       $ 3.02  
Warrants Outstanding                   12,220,538      
Common Stock | securities purchase agreement                          
Combined offering price per share   2.425                      
Exercise price of warrants | $ / shares   $ 2.425                      
Price per share | $ / shares   $ 0.0001                      
Warrants term   5 years                      
Underwritten Public Offering [Member]                          
Gross proceeds from issuance of shares | $         $ 12,000                
Underwritten Public Offering [Member] | October 2020 Common Warrants                          
Price per share | $ / shares     $ 3.00                    
Exercise price of warrants | $ / shares     $ 3.30                    
Gross proceeds from issuance of shares | $     $ 12,000                    
Offering costs | $     $ 1,300                    
Underwritten Public Offering [Member] | Common Share Units [Member] | October 2020 Common Warrants                          
Number of Shares of Common Stock to be Purchased Accompanied by Common Warrant     0.5                    
Common stock shares issued     4,000,000                    
Underwritten Public Offering [Member] | Warrant [Member] | October 2020 Common Warrants                          
Shares of common stock issued     2,300,000                    
Overallotment                          
Gross proceeds from issuance of shares | $             $ 1,350            
Overallotment | October 2020 Common Warrants                          
Shares of common stock issued     300,000