| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 01/16/19 | Statement of changes in beneficial ownership of securities | 
       
   | 
  1 | ||
| 01/11/19 | Statement of changes in beneficial ownership of securities | 
       
   | 
  1 | ||
| 01/10/19 | Statement of changes in beneficial ownership of securities | 
       
   | 
  1 | ||
| 01/04/19 | Statement of changes in beneficial ownership of securities | 
       
   | 
  1 | ||
| 01/04/19 | Statement of changes in beneficial ownership of securities | 
       
   | 
  1 | ||
| 01/03/19 | Statement of changes in beneficial ownership of securities | 
       
   | 
  1 | ||
| 12/28/18 | Statement of changes in beneficial ownership of securities | 
       
   | 
  1 | ||
| 12/28/18 | Statement of changes in beneficial ownership of securities | 
       
   | 
  1 | ||
| 12/27/18 | Statement of changes in beneficial ownership of securities | 
       
   | 
  1 | ||
| 12/26/18 | Statement of changes in beneficial ownership of securities | 
       
   | 
  1 | 
