| Date | Form | Description | XBRL | Pages |
|---|---|---|---|---|
| 02/13/12 | 4/A | Form 4/A: Statement of changes in beneficial ownership of securities | 2 | |
| 01/24/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 | |
| 01/03/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 | |
| 01/03/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 | |
| 12/28/11 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 | |
| 12/28/11 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 | |
| 12/21/11 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 | |
| 12/20/11 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 | |
| 12/20/11 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 | |
| 12/20/11 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 |