| Filing | Description | Date Filed | View |
| 4 | Statement of changes in beneficial ownership of securities | 05/21/13 |
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| 4 | Statement of changes in beneficial ownership of securities | 05/21/13 |
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| 4 | Statement of changes in beneficial ownership of securities | 05/13/13 |
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| 10-Q | Quarterly report which provides a continuing view of a company's financial position | 05/08/13 |
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| 8-K | Report of unscheduled material events or corporate event | 05/08/13 |
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| 8-K | Report of unscheduled material events or corporate event | 05/07/13 |
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| 4 | Statement of changes in beneficial ownership of securities | 05/06/13 |
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| 4 | Statement of changes in beneficial ownership of securities | 04/22/13 |
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| DEFA14A | Additional proxy soliciting materials - definitive | 04/11/13 |
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| 4 | Statement of changes in beneficial ownership of securities | 04/08/13 |
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