| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 07/13/15 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 07/13/15 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  1 | |
| 07/13/15 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 07/13/15 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 05/11/15 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 04/08/15 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 04/02/15 | 4/A | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 03/31/15 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 03/09/15 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 02/26/15 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | 

