| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 02/15/19 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 02/15/19 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 02/15/19 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 02/15/19 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 02/15/19 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 02/15/19 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 02/15/19 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 02/15/19 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 02/15/19 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 02/15/19 | Current report filing | 
       
   | 
  3 | 
