| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 02/20/19 | Statement of changes in beneficial ownership of securities | 
     PDF   
   | 
  1 | ||
| 02/20/19 | Statement of changes in beneficial ownership of securities | 
     PDF   
   | 
  1 | ||
| 02/20/19 | Statement of changes in beneficial ownership of securities | 
     PDF   
   | 
  1 | ||
| 02/20/19 | Statement of changes in beneficial ownership of securities | 
     PDF   
   | 
  1 | ||
| 02/20/19 | Statement of changes in beneficial ownership of securities | 
     PDF   
   | 
  1 | ||
| 02/19/19 | Statement of changes in beneficial ownership of securities | 
     PDF   
   | 
  1 | ||
| 02/19/19 | Statement of changes in beneficial ownership of securities | 
     PDF   
   | 
  1 | ||
| 02/19/19 | Statement of changes in beneficial ownership of securities | 
     PDF   
   | 
  1 | ||
| 02/19/19 | Statement of changes in beneficial ownership of securities | 
     PDF   
   | 
  1 | ||
| 02/19/19 | Statement of changes in beneficial ownership of securities | 
     PDF   
   | 
  1 |