cm:Concept: us-gaap:StockholdersEquityNoteDerivativeTransactionsConnectedWithContingentlyConvertibleSecurities
| Stockholders' Equity Note, Derivative Transactions Connected with Contingently Convertible Securities |
| us-gaap:StockholdersEquityNoteDerivativeTransactionsConnectedWithContingentlyConvertibleSecurities |
| Information regarding derivative transactions entered into in connection with the issuance of contingently convertible securities that may be useful in explaining the potential impact of the contingently convertible securities. This information may include the terms of the derivative transaction (including settlement terms), how the 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:StockholdersEquityNoteDerivativeTransactionsConnectedWithContingentlyConvertibleSecurities |