cm:Concept: us-gaap:ConversionOfStockSharesConverted1
| Conversion of Stock, Shares Converted |
| us-gaap:ConversionOfStockSharesConverted1 |
| The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. |
| cm:Concept |
| Shares (xbrli:sharesItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:ConversionOfStockSharesConverted1 |