cm:Concept: us-gaap:DeferredFinanceCostsOwnshareLendingArrangementIssuanceCostsAdjustment
| Deferred Finance Costs, Own-share Lending Arrangement, Issuance Costs, Adjustment |
| us-gaap:DeferredFinanceCostsOwnshareLendingArrangementIssuanceCostsAdjustment |
| The amount of any adjustment recognized to the balance of unamortized issuance costs associated with a share-lending arrangement entered into by the entity, in contemplation of a convertible debt offering or other financing, due, for example, to default by the share borrower. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| For Period (duration) |
| Credit |
| false |
| us-gaap:DeferredFinanceCostsOwnshareLendingArrangementIssuanceCostsAdjustment |