| Date | Form | Description | XBRL | Pages |
|---|---|---|---|---|
| 02/16/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 02/16/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 | |
| 02/01/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 02/01/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 02/01/12 | 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 | |
| 01/05/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 12/20/11 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 12/20/11 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 12/05/11 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 |