| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 12/17/10 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 12/17/10 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 12/16/10 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 12/14/10 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 12/14/10 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 11/22/10 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 11/16/10 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 11/16/10 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 11/12/10 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 11/09/10 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | 
