cm:Concept: us-gaap:ShareBasedCompensationForfeitureMethodFixedList
| Share-based Payment Arrangement, Forfeiture Method [Fixed List] |
| us-gaap:ShareBasedCompensationForfeitureMethodFixedList |
| Indicates method for determining cost for share-based payment arrangement by estimating expected forfeiture or recognizing forfeiture upon occurrence. Acceptable values are "Estimating expected forfeitures" and "Recognizing forfeitures when they occur". |
| cm:Concept |
| us-types:forfeitureMethod |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:ShareBasedCompensationForfeitureMethodFixedList |