cm:Concept: us-gaap:ConvertiblePreferredStockAssociatedDerivativeTransactions
| Convertible Preferred Stock, Associated Derivative Transactions |
| us-gaap:ConvertiblePreferredStockAssociatedDerivativeTransactions |
| Describe and provide information on derivative transactions entered into in connection with the issuance of the contingently convertible securities that may be useful in explaining the potential impact of the contingently convertible securities. May include the terms of those derivative transactions (including the terms of the settlement), how those transactions relate to the contingently convertible securities, and the number of shares underlying the derivatives. |
| cm:Concept |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:ConvertiblePreferredStockAssociatedDerivativeTransactions |