| Date | Form | Description | XBRL | Pages |
|---|---|---|---|---|
| 02/13/12 | SC 13G/A | Form SC 13G/A: Statement of Beneficial Ownership by Certain Investors | 5 | |
| 02/10/12 | SC 13G/A | Form SC 13G/A: Statement of Beneficial Ownership by Certain Investors | 5 | |
| 02/10/12 | SC 13G/A | Form SC 13G/A: Statement of Beneficial Ownership by Certain Investors | 4 | |
| 01/11/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 01/06/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 01/04/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 01/04/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 01/04/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 01/04/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 01/04/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 |
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