cm:Level2TextBlock: us-gaap:FullCostMethodUsingGrossRevenueMethodPolicy
| Full Cost Method Using Gross Revenue Method, Policy [Policy Text Block] |
| us-gaap:FullCostMethodUsingGrossRevenueMethodPolicy |
| Disclosure of accounting policy for use of the gross revenue method in place of the full cost method of accounting. The policy may describe when the entity believes it is more appropriate due to economic circumstances to compute amortization of capitalized costs based on the gross revenue method (rather than the units of production method that would result in improper matching of costs to the related revenue). |
| cm:Level2TextBlock |
| Text Block (HTML) (nonnum:textBlockItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:FullCostMethodUsingGrossRevenueMethodPolicy |