| 
                                    
                                        15 Feb
                                        2019
 | 10-K | 
                                     
                                        Annual report which provides a comprehensive overview of the company for the past year
                                     | 
                                    Annual Filings
                                 |  | 
                        
                            | 
                                    
                                        14 Feb
                                        2019
 | SC 13G/A | 
                                     
                                        An amendment to the SC 13G filing
                                     | 
                                    3,4,5
                                 |  | 
                        
                            | 
                                    
                                        14 Feb
                                        2019
 | SC 13G/A | 
                                     
                                        An amendment to the SC 13G filing
                                     | 
                                    3,4,5
                                 |  | 
                        
                            | 
                                    
                                        14 Feb
                                        2019
 | SC 13G/A | 
                                     
                                        An amendment to the SC 13G filing
                                     | 
                                    3,4,5
                                 |  | 
                        
                            | 
                                    
                                        14 Feb
                                        2019
 | SC 13G | 
                                     
                                        A statement of beneficial ownership of common stock by certain persons
                                     | 
                                    3,4,5
                                 |  | 
                        
                            | 
                                    
                                        12 Feb
                                        2019
 | 8-K | 
                                     
                                        Report of unscheduled material events or corporate event
                                     | 
                                    Current Reports
                                 |  | 
                        
                            | 
                                    
                                        11 Feb
                                        2019
 | SC 13G/A | 
                                     
                                        An amendment to the SC 13G filing
                                     | 
                                    3,4,5
                                 |  | 
                        
                            | 
                                    
                                        07 Feb
                                        2019
 | 4 | 
                                     
                                        Statement of changes in beneficial ownership of securities
                                     | 
                                    3,4,5
                                 |  | 
                        
                            | 
                                    
                                        04 Feb
                                        2019
 | 4 | 
                                     
                                        Statement of changes in beneficial ownership of securities
                                     | 
                                    3,4,5
                                 |  | 
                        
                            | 
                                    
                                        04 Feb
                                        2019
 | 4 | 
                                     
                                        Statement of changes in beneficial ownership of securities
                                     | 
                                    3,4,5
                                 |  |