cm:Concept: us-gaap:DebtConversionConvertedInstrumentIssuanceDateMonthAndYear
| Debt Conversion, Converted Instrument, Issuance Date, Month and Year |
| us-gaap:DebtConversionConvertedInstrumentIssuanceDateMonthAndYear |
| The month and year (YYYY-MM) the financial instrument was issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. |
| cm:Concept |
| Year/Month (xbrli:gYearMonthItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:DebtConversionConvertedInstrumentIssuanceDateMonthAndYear |