cm:Concept: us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
| Increase (Decrease) in Accounts Payable and Accrued Liabilities |
| us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities |
| The increase (decrease) during the reporting period in the amounts payable to vendors for goods and services received and the amount of obligations and expenses incurred but not paid. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| For Period (duration) |
| Debit |
| false |
| us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities |