cm:Concept: us-gaap:InvestmentCompanyTotalReturnBeforeIncentiveFees
| Investment Company, Total Return before Incentive Fees |
| us-gaap:InvestmentCompanyTotalReturnBeforeIncentiveFees |
| Percentage increase (decrease), before deduction of incentive fee, in fund net asset value. Includes, but is not limited to, interest and dividend income (loss) and realized and unrealized gain (loss). |
| cm:Concept |
| Percent (num:percentItemType) |
| For Period (duration) |
| (no balance type) |
| false |
| us-gaap:InvestmentCompanyTotalReturnBeforeIncentiveFees |