cm:Concept: us-gaap:DeferredFinanceCostsOwnshareLendingArrangementIssuanceCostsNetClassification
| Deferred Finance Costs, Own-share Lending Arrangement, Issuance Costs, Net, Classification |
| us-gaap:DeferredFinanceCostsOwnshareLendingArrangementIssuanceCostsNetClassification |
| If not separately presented, identifies the caption on the statement of financial position in which the unamortized balance of recognized deferred issuance costs related to an own-share lending arrangement entered into by the entity, in contemplation of a convertible debt offering or other financing, is included. |
| cm:Concept |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:DeferredFinanceCostsOwnshareLendingArrangementIssuanceCostsNetClassification |