| 
                                    
                                        16 May
                                        2019
 | 8-K | 
                                     
                                        Report of unscheduled material events or corporate event
                                     | 
                                    Current Reports
                                 |  | 
                        
                            | 
                                    
                                        13 May
                                        2019
 | 8-K | 
                                     
                                        Report of unscheduled material events or corporate event
                                     | 
                                    Current Reports
                                 |  | 
                        
                            | 
                                    
                                        10 May
                                        2019
 | 10-Q | 
                                     
                                        Quarterly report which provides a continuing view of a company's financial position
                                     | 
                                    Quarterly Filings
                                 |  | 
                        
                            | 
                                    
                                        03 May
                                        2019
 | DEFA14A | 
                                     
                                        Additional proxy soliciting materials - definitive
                                     | 
                                    Proxy Filings
                                 |  | 
                        
                            | 
                                    
                                        30 Apr
                                        2019
 | 4 | 
                                     
                                        Statement of changes in beneficial ownership of securities
                                     | 
                                    3,4,5
                                 |  | 
                        
                            | 
                                    
                                        30 Apr
                                        2019
 | 4 | 
                                     
                                        Statement of changes in beneficial ownership of securities
                                     | 
                                    3,4,5
                                 |  | 
                        
                            | 
                                    
                                        30 Apr
                                        2019
 | 4 | 
                                     
                                        Statement of changes in beneficial ownership of securities
                                     | 
                                    3,4,5
                                 |  | 
                        
                            | 
                                    
                                        30 Apr
                                        2019
 | 4 | 
                                     
                                        Statement of changes in beneficial ownership of securities
                                     | 
                                    3,4,5
                                 |  | 
                        
                            | 
                                    
                                        30 Apr
                                        2019
 | 4 | 
                                     
                                        Statement of changes in beneficial ownership of securities
                                     | 
                                    3,4,5
                                 |  | 
                        
                            | 
                                    
                                        30 Apr
                                        2019
 | 4 | 
                                     
                                        Statement of changes in beneficial ownership of securities
                                     | 
                                    3,4,5
                                 |  |