| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 02/08/11 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 02/04/11 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  3 | |
| 02/03/11 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  3 | |
| 02/03/11 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  3 | |
| 02/02/11 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  3 | |
| 01/27/11 | 8-K | Current report filing | 
       
   | 
  19 | |
| 01/25/11 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 01/25/11 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 01/25/11 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 01/25/11 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | 

