| Date | Form | Description | XBRL | Pages |
|---|---|---|---|---|
| 01/31/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 01/27/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 01/24/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 01/23/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 01/20/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 01/19/12 | 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 | |
| 01/12/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 | |
| 12/14/11 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 |