| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 06/01/15 | 3 | Initial statement of beneficial ownership of securities | 
       
   | 
  1 | |
| 01/05/15 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 05/30/14 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 02/10/14 | 3 | Initial statement of beneficial ownership of securities | 
       
   | 
  2 | |
| 10/08/13 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 10/08/13 | 3 | Initial statement of beneficial ownership of securities | 
       
   | 
  1 | |
| 04/05/13 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 02/04/13 | 3 | Initial statement of beneficial ownership of securities | 
       
   | 
  1 | |
| 01/24/13 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 07/17/12 | 3 | Initial statement of beneficial ownership of securities | 
       
   | 
  3 | 

