| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 10/15/18 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 10/15/18 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 10/12/18 | SC 13D/A | Schedule filed to report acquisition of beneficial ownership of 5% or more of a class of equity securities | 
       
   | 
  62 | |
| 10/10/18 | 4/A | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 10/10/18 | 4/A | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 10/10/18 | 4/A | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 10/10/18 | 4/A | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 10/09/18 | SC TO-I/A | Issuer tender offer statement | 
       
   | 
  8 | |
| 10/05/18 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 10/05/18 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | 


