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ORGANIZATION NATURE OF BUSINESS AND GOING CONCERN (Details) | 6 Months Ended
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Jun. 30, 2020
Furniture, fixtures and equipment [Member] | Minimum [Member] |
Estimated Useful Life | 5 years
Furniture, fixtures and equipment [Member] | Maximum [Member] |
Estimated Useful Life | 10 years
Computers and software [Member] | Minimum [Member] |
Estimated Useful Life | 3 years
Computers and software [Member] | Maximum [Member] |
Estimated Useful Life | 5 years
Machinery [Member] |
Estimated Useful Life | 20 years
Vehicles [Member] |
Estimated Useful Life | 6 years
Leasehold improvements and technical works [Member] |
Estimated Useful Life | Lesser of lease term or 40 years

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- References No definition available. + Details
Name: | cosm_EstimatedUsefulLife
Namespace Prefix: | cosm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_FurnitureAndFixturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_ComputerEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_MachineryAndEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_VehiclesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=cosm_LeaseholdImprovementsAndTechnicalWorksMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |