| Report Element Information |
| Run date/time: 7/21/2011 11:21:55 AM |
| Report Element Attributes: |
| Prefix: | pattern |
| Standard label: | Share Ownership Plan, Share Options Expired |
| Documentation: | Nam non tortor non leo porta bibendum. |
| Balance type: | |
| Period type: | For Period (duration) |
| Report element type: | [Concept] |
| Data type: | Shares (xbrli:sharesItemType) |
| ID: | pattern_ShareOwnershipPlanShareOptionsExpired |
| Name: | pattern:ShareOwnershipPlanShareOptionsExpired |
| Labels of Report Element |
| Role: | Label | Lang |
| (http://www.xbrl.org/2003/role/documentation) | Nam non tortor non leo porta bibendum. | en |
| Standard label (http://www.xbrl.org/2003/role/label) | Share Ownership Plan, Share Options Expired | en |
| Negated label (http://www.xbrl.org/2009/role/negatedLabel) | Share Ownership Plan, Share Options Expired | en |