| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 03/10/20 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 03/10/20 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 03/09/20 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 03/05/20 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 02/18/20 | 3/A | Initial statement of beneficial ownership of securities | 
       
   | 
  2 | |
| 02/03/20 | 3 | Initial statement of beneficial ownership of securities | 
       
   | 
  2 | |
| 01/31/20 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 01/31/20 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 01/10/20 | 3 | Initial statement of beneficial ownership of securities | 
       
   | 
  1 | |
| 07/12/19 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | 

