| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 05/15/19 | Statement of changes in beneficial ownership of securities | 
     PDF   
   | 
  1 | ||
| 05/15/19 | Statement of changes in beneficial ownership of securities | 
     PDF   
   | 
  1 | ||
| 05/15/19 | Statement of changes in beneficial ownership of securities | 
     PDF   
   | 
  1 | ||
| 05/15/19 | Statement of changes in beneficial ownership of securities | 
     PDF   
   | 
  1 | ||
| 05/15/19 | Statement of changes in beneficial ownership of securities | 
     PDF   
   | 
  1 | ||
| 05/15/19 | Statement of changes in beneficial ownership of securities | 
     PDF   
   | 
  1 | ||
| 05/15/19 | Current report filing | 
     PDF   
   | 
  3 | ||
| 05/10/19 | Statement of changes in beneficial ownership of securities | 
     PDF   
   | 
  1 | ||
| 05/09/19 | Statement of changes in beneficial ownership of securities | 
     PDF   
   | 
  1 | ||
| 05/02/19 | Statement of changes in beneficial ownership of securities | 
     PDF   
   | 
  1 |