| Date | Form | Description | XBRL | Pages |
|---|---|---|---|---|
| 03/19/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 4 | |
| 03/13/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 3 | |
| 03/07/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 3 | |
| 03/06/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 3 | |
| 02/23/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 3 | |
| 02/16/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 3 | |
| 02/14/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 3 | |
| 02/13/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 3 | |
| 02/10/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 3 | |
| 02/09/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 3 |