cm:Concept: us-gaap:AccountsPayableUnderwritersPromotersAndEmployeesOtherThanSalariesAndWagesCurrent
       
          
          | Accounts Payable, Underwriters, Promoters, and Employees, Current | 
       
       
          
          | us-gaap:AccountsPayableUnderwritersPromotersAndEmployeesOtherThanSalariesAndWagesCurrent | 
       
       
          
          | Amount of obligation to underwriters, promoters, and employees excluding salaries, wages and amount to related party, classified as current. | 
       
       
          
          | cm:Concept | 
       
       
          
          | Monetary (xbrli:monetaryItemType) | 
       
       
          
          | As Of (instant) | 
       
       
          
          | Credit | 
       
       
          
          | false | 
       
       
          
          | us-gaap:AccountsPayableUnderwritersPromotersAndEmployeesOtherThanSalariesAndWagesCurrent |