| Jun 2022 | Wifag Polytype Holding Ag | 2,226,084 | 19.82% | 0 | 0.00% | 0 | 0.00% | 
                    
                        
                            
                                
                                    |  |  |  | 
                                
                        
                        
                            | Mar 2022 | Wifag Polytype Holding Ag | 2,226,084 | 19.82% | 0 | 0.00% | 0 | 0.00% | 
                    
                        
                            
                                
                                    |  |  |  | 
                                
                        
                        
                            | Dec 2021 | Wifag Polytype Holding Ag (Foreign Company) | 2,226,084 | 19.82% | 0 | 0.00% | 0 | 0.00% | 
                    
                        
                            
                                
                                    |  |  |  | 
                                
                        
                        
                            | Sep 2021 | Wifag Polytype Holding Ag (Foreign Company) | 2,226,084 | 19.82% | 0 | 0.00% | 0 | 0.00% | 
                    
                        
                            
                                
                                    |  |  |  | 
                                
                        
                        
                            | Sep 2020 | Wifag Polytype Holding Ag (Foreign Company) | 2,226,084 | 19.82% | 0 | 0.00% | 0 | 0.00% | 
                    
                        
                            
                                
                                    |  |  |  | 
                                
                        
                        
                            | Mar 2020 | Wifag-Polytype Holding Ag | 2,226,084 | 19.82% | 0 | 0.00% | 0 | 0.00% | 
                    
                        
                            
                                
                                    |  |  |  | 
                                
                        
                        
                            | Sep 2019 | Wifag- Polytype Holding Ag | 2,226,084 | 19.82% | 0 | 0.00% | 0 | 0.00% | 
                    
                        
                            
                                
                                    |  |  |  | 
                                
                        
                        
                            | Mar 2019 | Wifag-Polytype Holding Ag | 2,226,084 | 19.82% | 0 | 0.00% | 2,226,084 | 100.00% | 
                    
                        
                            
                                
                                    |  |  |  | 
                                
                        
                        
                            | Sep 21, 2018 | Wifag- Polytype Holding Ag (Foreign Company) | 2,226,084 | 19.82% | 0 | 0.00% | 0 | 0.00% |