| Date | Form | Description | XBRL | Pages |
|---|---|---|---|---|
| 02/07/13 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 01/31/13 | SC 13G/A | Form SC 13G/A: Statement of Beneficial Ownership by Certain Investors | 5 | |
| 01/30/13 | SC 13G/A | Form SC 13G/A: Statement of Beneficial Ownership by Certain Investors | 4 | |
| 01/28/13 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 01/09/13 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 12/27/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 12/21/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 12/21/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 12/21/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 12/21/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 |