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Business Combinations (Details 1) - Variable Interest Entities [Member] | Mar. 31, 2017 USD ($)
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Business Acquisition [Line Items] |
Cash | $ 1,160,912
Convertible notes | 1,485,800
Derivative liability | 20,386
Total | $ 2,667,098

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- Definition Business combination recognized identifiable assets acquired and liabilities assumed cash. + References No definition available. + Details
Name: | cga_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCash
Namespace Prefix: | cga_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Business combination recognized identifiable assets acquired and liabilities assumed convertible notes. + References No definition available. + Details
Name: | cga_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedConvertibleNotes
Namespace Prefix: | cga_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Business combination recognized identifiable assets acquired and liabilities assumed derivative liability. + References No definition available. + Details
Name: | cga_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDerivativeLiability
Namespace Prefix: | cga_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Business combination recognized identifiable assets acquired and liabilities assumed total. + References No definition available. + Details
Name: | cga_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTotal
Namespace Prefix: | cga_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_BusinessAcquisitionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_FinancialInstrumentAxis=cga_VariableInterestEntitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |