| Date | Form | Description | XBRL | Pages |
|---|---|---|---|---|
| 02/21/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 02/21/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 02/21/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 02/21/12 | 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 | |
| 02/15/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 02/14/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 02/14/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 02/07/12 | 4/A | Form 4/A: Statement of changes in beneficial ownership of securities | 1 | |
| 02/06/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 |