cm:Concept: us-gaap:WarrantsAndRightsOutstandingValuationTechniqueExtensibleList
| Warrants and Rights Outstanding, Valuation Technique [Extensible List] |
| us-gaap:WarrantsAndRightsOutstandingValuationTechniqueExtensibleList |
| Indicates valuation technique for measuring 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 |
| srt-types:extensibleListItemType |
| As Of (instant) |
| (no balance type) |
| false |
| us-gaap:WarrantsAndRightsOutstandingValuationTechniqueExtensibleList |