| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 04/28/15 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 04/01/15 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 04/01/15 | 3 | Initial statement of beneficial ownership of securities | 
       
   | 
  2 | |
| 03/10/15 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 02/27/15 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 02/25/15 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 02/17/15 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 02/13/15 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 02/13/15 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 02/13/15 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | 

