| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 02/11/11 | Statement of changes in beneficial ownership of securities | 
       
   | 
  1 | ||
| 02/11/11 | Statement of changes in beneficial ownership of securities | 
       
   | 
  1 | ||
| 02/11/11 | Statement of changes in beneficial ownership of securities | 
       
   | 
  1 | ||
| 02/09/11 | Statement of changes in beneficial ownership of securities | 
       
   | 
  1 | ||
| 02/09/11 | Statement of changes in beneficial ownership of securities | 
       
   | 
  1 | ||
| 01/07/11 | Initial statement of beneficial ownership of securities | 
       
   | 
  2 | ||
| 01/04/11 | Statement of changes in beneficial ownership of securities | 
       
   | 
  1 | ||
| 01/03/11 | Statement of changes in beneficial ownership of securities | 
       
   | 
  1 | ||
| 01/03/11 | Statement of changes in beneficial ownership of securities | 
       
   | 
  1 | ||
| 01/03/11 | Statement of changes in beneficial ownership of securities | 
       
   | 
  1 | 
