| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 08/16/12 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 08/03/12 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 06/27/12 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 06/27/12 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 06/27/12 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 06/27/12 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 06/21/12 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 06/15/12 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 06/15/12 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 06/05/12 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | 
