cm:Member: us-gaap:ImmediateFamilyMemberOfManagementOrPrincipalOwnerMember
| Immediate Family Member of Management or Principal Owner [Member] |
| us-gaap:ImmediateFamilyMemberOfManagementOrPrincipalOwnerMember |
| Family member whom a principal owner or a member of management might control or influence, or by whom they might be controlled or influenced, because of the family relationship. |
| cm:Member |
| [Member] (nonnum:domainItemType) |
| For Period (duration) |
| (no balance type) |
| true |
| us-gaap:ImmediateFamilyMemberOfManagementOrPrincipalOwnerMember |