| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 02/21/14 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 02/20/14 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 02/20/14 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 02/14/14 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 01/16/14 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 12/16/13 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 12/02/13 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 11/27/13 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 11/18/13 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | |
| 11/15/13 | 4 | Statement of changes in beneficial ownership of securities | 
       
   | 
  2 | 
