| Date | Form | Description | XBRL | Pages |
|---|---|---|---|---|
| 01/20/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 01/13/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 01/13/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 01/04/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 12/29/11 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 | |
| 12/29/11 | 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 | 1 | |
| 12/02/11 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 12/02/11 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 11/01/11 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 |