| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 01/16/20 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 01/08/20 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 01/07/20 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 12/18/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 12/12/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 12/03/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 12/03/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 12/03/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 12/02/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 11/27/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | 

