cm:Concept: us-gaap:SubstantialDoubtAboutGoingConcernResolutionOfConditionsOrEvents
| Substantial Doubt about Going Concern, Resolution of Conditions or Events |
| us-gaap:SubstantialDoubtAboutGoingConcernResolutionOfConditionsOrEvents |
| Description of how the conditions or events that raised substantial doubt were resolved in a subsequent period. |
| cm:Concept |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:SubstantialDoubtAboutGoingConcernResolutionOfConditionsOrEvents |