cm:Concept: us-gaap:ShareBasedGoodsAndNonemployeeServicesTransactionCapitalizedCost
| Share-based Goods and Nonemployee Services Transaction, Capitalized Cost |
| us-gaap:ShareBasedGoodsAndNonemployeeServicesTransactionCapitalizedCost |
| The amount by which an asset or assets increased resulting from the transaction in which equity securities were issued to pay for goods or nonemployee services. |
| cm:Concept |
| Monetary (xbrli:monetaryItemType) |
| For Period (duration) |
| Debit |
| false |
| us-gaap:ShareBasedGoodsAndNonemployeeServicesTransactionCapitalizedCost |