| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 06/04/12 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 05/25/12 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 05/25/12 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 05/25/12 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 05/25/12 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 05/25/12 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 05/25/12 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 05/25/12 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 05/25/12 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 05/25/12 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | 
