Annual report pursuant to Section 13 and 15(d)

Equity Incentive Plan - Issuance of shares to former and current executives and consultants (Details)

v3.24.2.u1
Equity Incentive Plan - Issuance of shares to former and current executives and consultants (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Feb. 13, 2023
May 31, 2024
Dec. 31, 2023
Sep. 30, 2023
Aug. 31, 2023
Jul. 31, 2023
Apr. 30, 2022
May 31, 2024
Feb. 29, 2024
Nov. 30, 2023
Sep. 30, 2023
May 31, 2024
May 31, 2023
May 03, 2024
Dec. 30, 2023
Oct. 23, 2023
Jun. 30, 2023
Feb. 28, 2023
Dec. 01, 2022
Jun. 30, 2022
Share-based Compensation                                        
Exercise price of share   $ 0.21 $ 0.21 $ 0.50   $ 0.306   $ 0.21     $ 0.50 $ 0.21     $ 0.35   $ 0.306     $ 0.50
Exercise of warrants for cash, shares                       3,000,000.0                
Exercise of warrants for cash                       $ 300                
Common stock warrants to purchase shares     52,600,000 21,500,000             21,500,000   200,000              
Purchase price per unit                           $ 0.10   $ 0.16        
Cash and non-cash issuance costs capitalized   $ 1,900       $ 900   $ 1,900       1,900                
Loss on extinguishment of convertible notes           2,400           (13,374)                
Term of warrants     5 years 5 years             5 years                  
Placement agent fees and expenses               $ 26,000 $ 900 $ 400                    
Percentage of gross proceeds                 13.00% 12.00%                    
Stock issued for private offerings                       21,697 $ 37,224              
Issuance of common stock for principal of convertible notes                       5,250 4,000              
Proceeds from Warrant Exercises                       $ 300 $ 439              
Accredited investors warrants                                        
Share-based Compensation                                        
Common stock warrants to purchase shares   1,500,000           1,500,000       1,500,000                
Term of warrants   5 years           5 years       5 years                
Former CEO                                        
Share-based Compensation                                        
Shares issued during the period new issues shares                         380,704              
Former General Counsel                                        
Share-based Compensation                                        
Shares issued during the period new issues shares                         79,391              
Employees                                        
Share-based Compensation                                        
Shares issued during the period new issues shares                       153,027                
Consultants                                        
Share-based Compensation                                        
Stocks issued for severance payment                       2,454,515                
Placement agent notes                                        
Share-based Compensation                                        
Loss on extinguishment of convertible notes     $ 1,600     2,100                            
Term of warrants   10 years           10 years       10 years                
Third Private Placement                                        
Share-based Compensation                                        
Loss on extinguishment of convertible notes                       $ 7,300                
Non cash discount on convertible notes due to exercise price modification                 $ 100                      
Third Private Placement | Placement agent notes                                        
Share-based Compensation                                        
Number of common shares in a fixed combination issue of shares     1                                  
Number of shares     1                                  
Closing share price (as percentage)     0.13%                                  
Accredited Investors                                        
Share-based Compensation                                        
Shares issued during the period new issues shares   1,500,000                                    
Common stock warrants to purchase shares     52,600,000 21,500,000             21,500,000                  
Stock issued for private offerings     $ 5,900 $ 3,000                                
Accredited Investors | Placement agent notes                                        
Share-based Compensation                                        
Issuance of common stock for principal of convertible notes     $ 1,000     $ 2,300                            
Warrants issued in debt conversion     10,100,000     14,300,000                            
Private Warrant Exchange | Cyrus Arman                                        
Share-based Compensation                                        
Exercise price of share $ 0.50                                      
Shares issued during the period new issues shares 400,000                                      
Common stock warrants to purchase shares 1                                      
Number of shares per warrant 1                                      
Proceeds from Issuance of Common Stock $ 100                                      
Number of shares per unit 1                                      
Allotment to placement agent                                        
Share-based Compensation                                        
Exercise price of share     $ 0.13 $ 0.16             $ 0.16                  
Common stock warrants to purchase shares     7,900,000 3,200,000             3,200,000                  
Term of warrants     10 years 10 years             10 years                  
Placement agent fees and expenses     $ 5,000   $ 5,000                              
Percentage of gross proceeds     15.00%               15.00%                  
Allotment to placement agent | Warrants to Private Placement Agents                                        
Share-based Compensation                                        
Common stock warrants to purchase shares   13           13       13                
July Private Placement | Placement agent notes                                        
Share-based Compensation                                        
Purchase price per unit           $ 0.16                            
Number of common shares in a fixed combination issue of shares           1                            
Number of warrants in a fixed combination issue of securities           1                            
Number of shares           1                            
Closing share price (as percentage)     90.00%     90.00%                            
Second Warrant                                        
Share-based Compensation                                        
Exercise price of share                                     $ 0.10  
Maximum | Third Private Placement                                        
Share-based Compensation                                        
Exercise price of share                   $ 0.35                    
Maximum | Second Warrant                                        
Share-based Compensation                                        
Common stock warrants to purchase shares                                   7,500,000 7,500,000  
Minimum                                        
Share-based Compensation                                        
Exercise price of share   $ 0.10           $ 0.10       $ 0.10                
Minimum | Third Private Placement                                        
Share-based Compensation                                        
Exercise price of share                 $ 0.21                      
2012 Equity Incentive Plan | Executives                                        
Share-based Compensation                                        
Percent of salary in lieu of cash, net of payroll deductions and withholding taxes             25.00%                          
Shares issued                       522,382                
2012 Equity Incentive Plan | Consultants                                        
Share-based Compensation                                        
Stocks issued for severance payment                         1,617,760