| Date | Form | Description | XBRL | Pages |
|---|---|---|---|---|
| 04/23/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 | |
| 04/23/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 | |
| 04/23/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 | |
| 04/23/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 | |
| 02/27/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 | |
| 02/17/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 | |
| 02/17/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 | |
| 02/17/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 | |
| 02/10/12 | 5 | Form 5: Annual statement of changes in beneficial ownership of securities | 2 | |
| 01/24/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 2 |