| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 05/07/13 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 05/07/13 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 05/06/13 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 05/01/13 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 04/30/13 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 04/29/13 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 04/29/13 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 04/29/13 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 04/29/13 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 03/12/13 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | 

