| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 02/11/20 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 11/18/19 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 11/04/19 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 11/04/19 | Statement of changes in beneficial ownership of securities | 
       
   | 
  5 | ||
| 08/21/19 | Statement of changes in beneficial ownership of securities | 
       
   | 
  4 | ||
| 08/07/19 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 08/05/19 | Statement of changes in beneficial ownership of securities | 
       
   | 
  3 | ||
| 05/29/19 | Statement of changes in beneficial ownership of securities | 
       
   | 
  3 | ||
| 05/29/19 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 05/29/19 | Statement of changes in beneficial ownership of securities | 
       
   | 
  3 | 
