| Date | Form | Description | XBRL | Pages |
|---|---|---|---|---|
| 03/27/12 | 8-K | Form 8-K: Current report | 14 | |
| 03/22/12 | 8-K | Form 8-K: Current report | 12 | |
| 03/20/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 03/13/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 02/14/12 | SC 13G/A | Form SC 13G/A: Statement of Beneficial Ownership by Certain Investors | 5 | |
| 02/13/12 | SC 13G/A | Form SC 13G/A: Statement of Beneficial Ownership by Certain Investors | 3 | |
| 02/07/12 | 5 | Form 5: Annual statement of changes in beneficial ownership of securities | 1 | |
| 01/18/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 01/17/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 | |
| 01/12/12 | 4 | Form 4: Statement of changes in beneficial ownership of securities | 1 |
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