cm:Concept: us-gaap:OwnshareLendingArrangementSharesOutstanding
| Own-share Lending Arrangement, Shares, Outstanding |
| us-gaap:OwnshareLendingArrangementSharesOutstanding |
| The number of shares outstanding as of the date of the statement of financial position 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 |
| Shares (xbrli:sharesItemType) |
| As Of (instant) |
| (no balance type) |
| false |
| us-gaap:OwnshareLendingArrangementSharesOutstanding |