cm:Member: us-gaap:CollaborativeArrangementTransactionWithPartyToCollaborativeArrangementAndThirdPartyMember
| Collaborative Arrangement, Transaction with Party to Collaborative Arrangement and Third Party [Member] |
| us-gaap:CollaborativeArrangementTransactionWithPartyToCollaborativeArrangementAndThirdPartyMember |
| Collaborative arrangement transaction between party to collaborative arrangement and third party. |
| cm:Member |
| [Member] (nonnum:domainItemType) |
| For Period (duration) |
| (no balance type) |
| true |
| us-gaap:CollaborativeArrangementTransactionWithPartyToCollaborativeArrangementAndThirdPartyMember |