| Date | Form | Description | XBRL | Pages | |
|---|---|---|---|---|---|
| 04/23/12 | Statement of changes in beneficial ownership of securities |
|
2 | ||
| 04/23/12 | Statement of changes in beneficial ownership of securities |
|
2 | ||
| 02/27/12 | Statement of changes in beneficial ownership of securities |
|
2 | ||
| 02/17/12 | Statement of changes in beneficial ownership of securities |
|
2 | ||
| 02/17/12 | Statement of changes in beneficial ownership of securities |
|
2 | ||
| 02/17/12 | Statement of changes in beneficial ownership of securities |
|
2 | ||
| 02/10/12 | Annual statement of changes in beneficial ownership of securities |
|
2 | ||
| 01/24/12 | Statement of changes in beneficial ownership of securities |
|
2 | ||
| 01/24/12 | Statement of changes in beneficial ownership of securities |
|
2 | ||
| 01/24/12 | Statement of changes in beneficial ownership of securities |
|
2 |