| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 01/25/11 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 01/24/11 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 01/24/11 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  3 | |
| 01/24/11 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  3 | |
| 01/24/11 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 01/24/11 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 01/03/11 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  3 | |
| 01/03/11 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  3 | |
| 01/03/11 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 12/17/10 | 8-K | Current report filing | 
       
   | 
  7 | 

