cm:Concept: us-gaap:ConvertibleDebtCurrent
       
          
          | Convertible Debt, Current | 
       
       
          
          | us-gaap:ConvertibleDebtCurrent | 
       
       
          
          | The portion of the carrying value of long-term convertible debt as of the balance sheet date that is scheduled to be repaid within one year or in the normal operating cycle if longer. Convertible debt is a financial instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder. | 
       
       
          
          | cm:Concept | 
       
       
          
          | Monetary (xbrli:monetaryItemType) | 
       
       
          
          | As Of (instant) | 
       
       
          
          | Credit | 
       
       
          
          | false | 
       
       
          
          | us-gaap:ConvertibleDebtCurrent |