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Business Combinations (Details 1) - Variable Interest Entities [Member] - USD ($) | Nov. 30, 2017 | Jan. 01, 2017 | Jun. 30, 2016
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Cash |  | $ 1,201,888 | $ 5,568,500
Convertible notes |  | 1,559,350 | 6,671,769
Derivative liability |  | 3,549 | 144,818
Total Payback |  | $ 2,764,787 | $ 12,385,087
Zhenbai [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Cash | $ 461,330 |  |
Interest Payable | 83,039 |  |
Convertible notes | 1,724,683 |  |
Derivative liability | 13,353 |  |
Total Payback | 2,282,406 |  |
Net Loss | $ (331,995) |  |

X
- Definition Business combination net loss. + References No definition available. + Details
Name: | cga_BusinessCombinationNetLoss
Namespace Prefix: | cga_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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

X
- 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: | credit
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

X
- Definition Business combinatin recognized identificable assets interest payable. + References No definition available. + Details
Name: | cga_InterestPayable
Namespace Prefix: | cga_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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

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

X
- Details
Name: | us-gaap_ShareholdersEquityClassAxis=us-gaap_ShareholdersEquityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |