| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 05/31/18 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 01/02/18 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  3 | |
| 01/02/18 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  4 | |
| 01/02/18 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  4 | |
| 12/28/17 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  3 | |
| 12/28/17 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  4 | |
| 12/28/17 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  4 | |
| 12/26/17 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  4 | |
| 12/26/17 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  3 | |
| 12/26/17 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  4 | 

