cm:Level3TextBlock: us-gaap:ScheduleOfShareBasedGoodsAndNonemployeeServicesTransactionBySupplierTextBlock
| Schedule of Share-based Goods and Nonemployee Services Transaction by Supplier [Table Text Block] |
| us-gaap:ScheduleOfShareBasedGoodsAndNonemployeeServicesTransactionBySupplierTextBlock |
| Tabular disclosure of each transaction in which an entity acquires goods or services other than employee services in exchange for equity securities of the company, including the purpose of the transaction, identification and quantity of the securities issued, the accounting made, disclosure of amounts by which report lines were affected, and noncash effects on the statement of cash flows. |
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| Text Block (HTML) (nonnum:textBlockItemType) |
| For Period (duration) |
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| us-gaap:ScheduleOfShareBasedGoodsAndNonemployeeServicesTransactionBySupplierTextBlock |
| SharebasedGoodsAndNonemployeeServicesTransactionBySupplier |