cm:Concept: us-gaap:GovernmentalContractsSubjectToRenegotiation
| Governmental Contracts Subject to Renegotiation |
| us-gaap:GovernmentalContractsSubjectToRenegotiation |
| Where government contracts constitute a substantial part of the business, a general description of the possible uncertainties resulting from the renegotiation of government contracts and subcontracts which are subject to renegotiation. |
| cm:Concept |
| Text/String (xbrli:stringItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:GovernmentalContractsSubjectToRenegotiation |