| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 05/14/12 | Initial statement of beneficial ownership of securities | 
       
   | 
  1 | ||
| 05/14/12 | Initial statement of beneficial ownership of securities | 
       
   | 
  2 | ||
| 05/14/12 | Initial statement of beneficial ownership of securities | 
       
   | 
  3 | ||
| 05/14/12 | Initial statement of beneficial ownership of securities | 
       
   | 
  3 | ||
| 05/11/12 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 05/10/12 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 05/09/12 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 05/04/12 | Current report filing | 
       
   | 
  5 | ||
| 05/04/12 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | ||
| 05/04/12 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | 
