cm:Concept: us-gaap:OwnshareLendingArrangementDividendsNotReimbursed
| Own-share Lending Arrangement, Dividends, Not Reimbursed |
| us-gaap:OwnshareLendingArrangementDividendsNotReimbursed |
| The amount of dividends paid to holders of record of shares of the entity's stock associated with an own-share lending arrangement in contemplation of a convertible debt offering or other financing, which will not be reimbursed by the counterparty (share borrower) to the arrangement. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| For Period (duration) |
| Debit |
| false |
| us-gaap:OwnshareLendingArrangementDividendsNotReimbursed |