cm:Concept: us-gaap:CommonStockSharesSubscriptions
       
          
          | Common Stock, Value, Subscriptions | 
       
       
          
          | us-gaap:CommonStockSharesSubscriptions | 
       
       
          
          | Monetary value of common stock allocated to investors to buy shares of a new issue of common stock before they are offered to the public. When stock is sold on a subscription basis, the issuer does not initially receive the total proceeds. In general, the issuer does not issue the shares to the investor until it receives the entire proceeds. | 
       
       
          
          | cm:Concept | 
       
       
          
          | Monetary (xbrli:monetaryItemType) | 
       
       
          
          | As Of (instant) | 
       
       
          
          | Credit | 
       
       
          
          | false | 
       
       
          
          | us-gaap:CommonStockSharesSubscriptions |