| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 05/23/18 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 05/22/18 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 05/22/18 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  1 | |
| 05/21/18 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 05/21/18 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  1 | |
| 05/21/18 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 05/21/18 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 05/21/18 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 05/21/18 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 05/21/18 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | 

