cm:Concept: us-gaap:ShareBasedGoodsAndNonemployeeServicesTransactionValuationMethod
| Share-based Goods and Nonemployee Services Transaction, Valuation Method |
| us-gaap:ShareBasedGoodsAndNonemployeeServicesTransactionValuationMethod |
| States whether the transaction was based on the fair value of the goods and services received, or on the fair value of the securities issued, and sets forth the assumptions underlying the determination of fair value. |
| cm:Concept |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:ShareBasedGoodsAndNonemployeeServicesTransactionValuationMethod |