| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 07/23/13 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 07/23/13 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 07/23/13 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 04/15/13 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 04/09/13 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 03/19/13 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 03/18/13 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 03/18/13 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 03/12/13 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 03/12/13 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | 

