| 
                                 
                                    
                                        10 May
                                         
                                        2016
                                    
                                 
                             | 
                            
                                 4 
                             | 
                            
                                 
                                     
                                        Statement of changes in beneficial ownership of securities
                                    
                                
                             | 
                            
                                 
                                    3,4,5
                                 
                             | 
                            
                                
                             | 
                        
                        
                            | 
                                 
                                    
                                        10 May
                                         
                                        2016
                                    
                                 
                             | 
                            
                                 4 
                             | 
                            
                                 
                                     
                                        Statement of changes in beneficial ownership of securities
                                    
                                
                             | 
                            
                                 
                                    3,4,5
                                 
                             | 
                            
                                
                             | 
                        
                        
                            | 
                                 
                                    
                                        10 May
                                         
                                        2016
                                    
                                 
                             | 
                            
                                 8-K 
                             | 
                            
                                 
                                     
                                        Report of unscheduled material events or corporate event
                                    
                                
                             | 
                            
                                 
                                    Current Reports
                                 
                             | 
                            
                                
                             | 
                        
                        
                            | 
                                 
                                    
                                        05 May
                                         
                                        2016
                                    
                                 
                             | 
                            
                                 10-Q 
                             | 
                            
                                 
                                     
                                        Quarterly report which provides a continuing view of a company's financial position
                                    
                                
                             | 
                            
                                 
                                    Quarterly Filings
                                 
                             | 
                            
                                
                             | 
                        
                        
                            | 
                                 
                                    
                                        05 May
                                         
                                        2016
                                    
                                 
                             | 
                            
                                 8-K 
                             | 
                            
                                 
                                     
                                        Report of unscheduled material events or corporate event
                                    
                                
                             | 
                            
                                 
                                    Current Reports
                                 
                             | 
                            
                                
                             | 
                        
                        
                            | 
                                 
                                    
                                        04 May
                                         
                                        2016
                                    
                                 
                             | 
                            
                                 4 
                             | 
                            
                                 
                                     
                                        Statement of changes in beneficial ownership of securities
                                    
                                
                             | 
                            
                                 
                                    3,4,5
                                 
                             | 
                            
                                
                             | 
                        
                        
                            | 
                                 
                                    
                                        26 Apr
                                         
                                        2016
                                    
                                 
                             | 
                            
                                 DEF 14A 
                             | 
                            
                                 
                                     
                                        Official notification to shareholders of matters to be brought to a vote ("Proxy")
                                    
                                
                             | 
                            
                                 
                                    Proxy Filings
                                 
                             | 
                            
                                
                             | 
                        
                        
                            | 
                                 
                                    
                                        11 Apr
                                         
                                        2016
                                    
                                 
                             | 
                            
                                 SC 13G/A 
                             | 
                            
                                 
                                     
                                        An amendment to the SC 13G filing
                                    
                                
                             | 
                            
                                 
                                    3,4,5
                                 
                             | 
                            
                                
                             | 
                        
                        
                            | 
                                 
                                    
                                        08 Apr
                                         
                                        2016
                                    
                                 
                             | 
                            
                                 4 
                             | 
                            
                                 
                                     
                                        Statement of changes in beneficial ownership of securities
                                    
                                
                             | 
                            
                                 
                                    3,4,5
                                 
                             | 
                            
                                
                             | 
                        
                        
                            | 
                                 
                                    
                                        08 Apr
                                         
                                        2016
                                    
                                 
                             | 
                            
                                 4 
                             | 
                            
                                 
                                     
                                        Statement of changes in beneficial ownership of securities
                                    
                                
                             | 
                            
                                 
                                    3,4,5
                                 
                             | 
                            
                                
                             |