| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 02/23/12 | Statement of changes in beneficial ownership of securities |
|
2 | ||
| 02/23/12 | Statement of changes in beneficial ownership of securities |
|
2 | ||
| 12/19/11 | Statement of changes in beneficial ownership of securities |
|
2 | ||
| 03/25/11 | Initial statement of beneficial ownership of securities |
|
2 | ||
| 03/25/11 | Initial statement of beneficial ownership of securities |
|
3 | ||
| 03/25/11 | Initial statement of beneficial ownership of securities |
|
2 | ||
| 03/09/11 | Statement of changes in beneficial ownership of securities |
|
2 | ||
| 03/01/11 | Statement of changes in beneficial ownership of securities |
|
2 | ||
| 02/18/11 | Statement of changes in beneficial ownership of securities |
|
2 | ||
| 01/04/11 | Statement of changes in beneficial ownership of securities |
|
2 |
