Basis of Presentation and Summary of Significant Accounting Policies (Details 4)	12 Months Ended
Jun. 30, 2019
Accounting Policies [Abstract]
Risk-free rate	3.10%
Volatility	214.90%
Dividend yield	0.00%
Country risk premium	90.00%
Liquidity risk premium	3.00%

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).

No definition available.

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Namespace Prefix:	cga_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration