| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 08/01/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 08/01/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 08/01/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 08/01/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 08/01/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 07/31/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 07/31/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 07/16/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 07/05/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 07/02/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | 

