| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 06/27/16 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 06/27/16 | Current report filing | 
       
   | 
  3 | ||
| 06/24/16 | Initial statement of beneficial ownership of securities | 
       
   | 
  2 | ||
| 06/22/16 | Current report filing | 
       
   | 
  5 | ||
| 06/16/16 | Statement of changes in beneficial ownership of securities | 
       
   | 
  1 | ||
| 06/07/16 | Statement of changes in beneficial ownership of securities | 
       
   | 
  1 | ||
| 06/06/16 | Current report filing | 
       
   | 
  27 | ||
| 05/25/16 | Statement of changes in beneficial ownership of securities | 
       
   | 
  1 | ||
| 05/23/16 | Confidential treatment order | 
       
   | 
  1 | ||
| 05/20/16 | Specialized Disclosure Report filed pursuant to Section 1502 of the Dodd-Frank Wall Street Reform and Consumer Protection Act relating to the use of conflict minerals (Rule 13p-1) | 
       
   | 
  13 | 
