| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 02/21/12 | 4 | Statement of changes in beneficial ownership of securities | 1 | ||
| 02/21/12 | 4 | Statement of changes in beneficial ownership of securities | 1 | ||
| 02/21/12 | 4 | Statement of changes in beneficial ownership of securities | 1 | ||
| 02/21/12 | 4 | Statement of changes in beneficial ownership of securities | 1 | ||
| 02/21/12 | 4 | Statement of changes in beneficial ownership of securities | 1 | ||
| 02/21/12 | 4 | Statement of changes in beneficial ownership of securities | 1 | ||
| 02/21/12 | 4 | Statement of changes in beneficial ownership of securities | 1 | ||
| 12/07/11 | 4 | Statement of changes in beneficial ownership of securities | 1 | ||
| 11/17/11 | 4 | Statement of changes in beneficial ownership of securities | 1 | ||
| 11/14/11 | 4 | Statement of changes in beneficial ownership of securities | 1 |