cm:Concept: us-gaap:WarrantsAndRightsOutstandingMeasurementInput
| Warrants and Rights Outstanding, Measurement Input |
| us-gaap:WarrantsAndRightsOutstandingMeasurementInput |
| Value of input used to measure outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur. |
| cm:Concept |
| Decimal (xbrli:decimalItemType) |
| As Of (instant) |
| (no balance type) |
| false |
| us-gaap:WarrantsAndRightsOutstandingMeasurementInput |