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Basis of Presentation and Summary of Significant Accounting Policies (Details) - Schedule of derivative liabilities at fair value | 12 Months Ended
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Jun. 30, 2019
Schedule of derivative liabilities at fair value [Abstract] |
Risk-free rate | 3.10%
Volatility | 214.90%
Dividend yield | 0.00%
Country risk premium | 90.00%
Liquidity risk premium | 3.00%

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- Definition Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price). + References No definition available. + Details
Name: | cga_FairValueAssumptionExpectedDividendRate
Namespace Prefix: | cga_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Risk-free interest rate assumption used in valuing an instrument. + References No definition available. + Details
Name: | cga_FairValueAssumptionRiskFreeInterestRate
Namespace Prefix: | cga_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Weighted average expected volatility of stock price. + References No definition available. + Details
Name: | cga_FairValueAssumptionWeightedAverageVolatilityRate
Namespace Prefix: | cga_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Country risk premium assumption used in valuing an instrument. + References No definition available. + Details
Name: | cga_FairValueAssumptionsCountryRiskPremiumRate
Namespace Prefix: | cga_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Liquidity risk premium assumption used in valuing an instrument. + References No definition available. + Details
Name: | cga_FairValueAssumptionsLiquidityRiskPremium
Namespace Prefix: | cga_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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