| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 02/05/19 | Statement of changes in beneficial ownership of securities | 
       
   | 
  1 | ||
| 12/31/18 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 12/31/18 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 12/31/18 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 12/19/18 | Statement of changes in beneficial ownership of securities | 
       
   | 
  1 | ||
| 12/19/18 | Statement of changes in beneficial ownership of securities | 
       
   | 
  1 | ||
| 12/14/18 | Statement of changes in beneficial ownership of securities | 
       
   | 
  1 | ||
| 12/13/18 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 12/13/18 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 12/13/18 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | 
