cm:Concept: us-gaap:AdjustmentsToAdditionalPaidInCapitalConvertibleDebtWithConversionFeature
| Adjustments to Additional Paid in Capital, Convertible Debt with Conversion Feature |
| us-gaap:AdjustmentsToAdditionalPaidInCapitalConvertibleDebtWithConversionFeature |
| Amount of increase (decrease) in additional paid in capital (APIC) resulting from recognition of deferred taxes for convertible debt with a beneficial conversion feature. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| For Period (duration) |
| Credit |
| false |
| us-gaap:AdjustmentsToAdditionalPaidInCapitalConvertibleDebtWithConversionFeature |