| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 07/02/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 07/01/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 06/19/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 06/17/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 06/06/19 | 4/A | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 06/05/19 | 4/A | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 06/04/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 05/20/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 05/20/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 05/20/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | 

