| Date | Form | Description | XBRL | Pages |
|---|---|---|---|---|
| 02/13/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 | |
| 02/13/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 | |
| 01/26/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 | |
| 01/25/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 | |
| 12/27/11 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 | |
| 12/22/11 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 | |
| 12/06/11 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 | |
| 12/05/11 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 | |
| 11/22/11 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 | |
| 10/31/11 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 |