| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 01/06/20 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 12/31/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 12/31/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 12/18/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 12/09/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 12/04/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 11/22/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 11/18/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 11/18/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 11/18/19 | 3 | Initial statement of beneficial ownership of securities | 
       
   | 
  2 | 

