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ACQUISITION OF COSMOFARM, LTD. (Details 1) | 3 Months Ended
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Mar. 31, 2019 USD ($)
Acquired intangible assets | $ 213,790
Trademark [Member] |
Acquired intangible assets | $ 36,997
Acquired intangible assets, Useful Life (Years) | 5 years
Customer base [Member] |
Acquired intangible assets | $ 176,793
Acquired intangible assets, Useful Life (Years) | 10 years

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- Definition Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_BusinessAcquisitionAxis=COSM_TrademarkMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_BusinessAcquisitionAxis=COSM_CustomerBaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |