cm:Concept: us-gaap:OwnshareLendingArrangementCollateral
| Own-share Lending Arrangement, Collateral |
| us-gaap:OwnshareLendingArrangementCollateral |
| The amount of collateral required to be received or received by the entity from the counterparty (share borrower) in connection with an own-share lending arrangement entered into by the entity, in contemplation of a convertible debt offering or other financing. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| As Of (instant) |
| Credit |
| false |
| us-gaap:OwnshareLendingArrangementCollateral |