| Date | Form | Description | XBRL | Pages |
|---|---|---|---|---|
| 02/27/13 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 02/27/13 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 02/22/13 | 4/A | Form 4/A: Statement of changes in beneficial ownership of securities | 1 | |
| 02/11/13 | SC 13G/A | Form SC 13G/A: Statement of Beneficial Ownership by Certain Investors | 5 | |
| 02/11/13 | SC 13G | Form SC 13G: Statement of Beneficial Ownership by Certain Investors | 4 | |
| 02/08/13 | SC 13G/A | Form SC 13G/A: Statement of Beneficial Ownership by Certain Investors | 5 | |
| 02/07/13 | SC 13G/A | Form SC 13G/A: Statement of Beneficial Ownership by Certain Investors | 6 | |
| 01/04/13 | 5 | Form 5: Annual statement of changes in beneficial ownership of securities | 1 | |
| 01/04/13 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 01/04/13 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 |