| Date | Form | Description | XBRL | Pages |
|---|---|---|---|---|
| 02/28/13 | 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 | |
| 02/21/13 | 8-K | Form 8-K: Current report | 9 | |
| 02/14/13 | SC 13G | Form SC 13G: Statement of Beneficial Ownership by Certain Investors | 3 | |
| 02/11/13 | SC 13G/A | Form SC 13G/A: Statement of Beneficial Ownership by Certain Investors | 5 | |
| 02/08/13 | SC 13G/A | Form SC 13G/A: Statement of Beneficial Ownership by Certain Investors | 7 | |
| 01/24/13 | 5 | Form 5: Annual statement of changes in beneficial ownership of securities | 1 | |
| 01/09/13 | UPLOAD | Form UPLOAD: SEC-generated letter | 1 | |
| 01/08/13 | CORRESP | Form CORRESP: Correspondence | 4 | |
| 01/07/13 | SC 13G/A | Form SC 13G/A: Statement of Beneficial Ownership by Certain Investors | 2 |
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