| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 02/25/13 | 4 | Statement of changes in beneficial ownership of securities | 1 | ||
| 02/22/13 | 4 | Statement of changes in beneficial ownership of securities | 1 | ||
| 02/22/13 | 4 | Statement of changes in beneficial ownership of securities | 1 | ||
| 02/20/13 | 4 | Statement of changes in beneficial ownership of securities | 1 | ||
| 02/19/13 | 4 | Statement of changes in beneficial ownership of securities | 1 | ||
| 01/09/13 | 4 | Statement of changes in beneficial ownership of securities | 1 | ||
| 12/20/12 | 4 | Statement of changes in beneficial ownership of securities | 2 | ||
| 12/14/12 | 4 | Statement of changes in beneficial ownership of securities | 1 | ||
| 08/08/12 | 4 | Statement of changes in beneficial ownership of securities | 1 | ||
| 08/07/12 | 4 | Statement of changes in beneficial ownership of securities | 1 |