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STOCKHOLDERS' EQUITY (Details Textual) (USD $)
1 Months Ended 6 Months Ended 12 Months Ended 3 Months Ended 1 Months Ended 6 Months Ended
Sep. 30, 2014
Sep. 28, 2013
Dec. 31, 2014
Jun. 30, 2014
Sep. 30, 2014
Sep. 26, 2013
Dec. 31, 2013
Stockholders Equity [Line Items]              
Preferred Stock, Shares Authorized 20,000,000us-gaap_PreferredStockSharesAuthorized   20,000,000us-gaap_PreferredStockSharesAuthorized 20,000,000us-gaap_PreferredStockSharesAuthorized 20,000,000us-gaap_PreferredStockSharesAuthorized    
Preferred Stock, Par or Stated Value Per Share (in dollars per share) $ 0.001us-gaap_PreferredStockParOrStatedValuePerShare   $ 0.001us-gaap_PreferredStockParOrStatedValuePerShare $ 0.001us-gaap_PreferredStockParOrStatedValuePerShare 0.001us-gaap_PreferredStockParOrStatedValuePerShare    
Stock Issued During Period, Shares, Employee Stock Purchase Plans     552,495us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans        
Stock Issued During Period, Value, Restricted Stock Award, Gross $ 3,675,000us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross $ 7,490,000us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross          
Dividends Payable, Amount Per Share     $ 0.10us-gaap_DividendsPayableAmountPerShare        
Dividends Payable     3,296,156us-gaap_DividendsPayableCurrentAndNoncurrent        
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options     2,403,958us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions        
Common Stock [Member]              
Stockholders Equity [Line Items]              
Stock Issued During Period, Shares, Issued for Services     67,310us-gaap_StockIssuedDuringPeriodSharesIssuedForServices
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
17,356us-gaap_StockIssuedDuringPeriodSharesIssuedForServices
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
     
Stock Issued During Period, Value, Issued for Services     137,075us-gaap_StockIssuedDuringPeriodValueIssuedForServices
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
65,535us-gaap_StockIssuedDuringPeriodValueIssuedForServices
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
     
Stock Issued During Period, Value, Employee Stock Purchase Plan     1,246,746us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options     1,305,931us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Equity Incentive Plan 2009 [Member]              
Stockholders Equity [Line Items]              
Stock Issued During Period, Shares, Restricted Stock Award, Gross   1,750,000us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross
/ us-gaap_PlanNameAxis
= cga_EquityIncentivePlan2009Member
    1,750,000us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross
/ us-gaap_PlanNameAxis
= cga_EquityIncentivePlan2009Member
   
Mr Tao Li [Member]              
Stockholders Equity [Line Items]              
Stock Issued During Period, Value, Employee Stock Purchase Plan           200,000us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan
/ us-gaap_TitleOfIndividualAxis
= cga_MrTaoLiMember
 
Officers' Compensation           325,000us-gaap_OfficersCompensation
/ us-gaap_TitleOfIndividualAxis
= cga_MrTaoLiMember
 
Mr Tao Li [Member] | Common Stock [Member]              
Stockholders Equity [Line Items]              
Equity Issuance, Per Share Amount           $ 4.42us-gaap_EquityIssuancePerShareAmount
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
/ us-gaap_TitleOfIndividualAxis
= cga_MrTaoLiMember
 
Stock Issued During Period, Shares, Share-based Compensation, Gross             118,778us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensationGross
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
/ us-gaap_TitleOfIndividualAxis
= cga_MrTaoLiMember
Mr Tao Li [Member] | Equity Incentive Plan 2009 [Member]              
Stockholders Equity [Line Items]              
Stock Issued During Period, Shares, Restricted Stock Award, Gross   480,000us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross
/ us-gaap_PlanNameAxis
= cga_EquityIncentivePlan2009Member
/ us-gaap_TitleOfIndividualAxis
= cga_MrTaoLiMember
    240,000us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross
/ us-gaap_PlanNameAxis
= cga_EquityIncentivePlan2009Member
/ us-gaap_TitleOfIndividualAxis
= cga_MrTaoLiMember
   
Mr Ken Ren [Member] | Equity Incentive Plan 2009 [Member]              
Stockholders Equity [Line Items]              
Stock Issued During Period, Shares, Restricted Stock Award, Gross   200,000us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross
/ us-gaap_PlanNameAxis
= cga_EquityIncentivePlan2009Member
/ us-gaap_TitleOfIndividualAxis
= cga_MrKenRenMember
    100,000us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross
/ us-gaap_PlanNameAxis
= cga_EquityIncentivePlan2009Member
/ us-gaap_TitleOfIndividualAxis
= cga_MrKenRenMember
   
Mr Yizhao Zhang [Member]              
Stockholders Equity [Line Items]              
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures   40,000us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
/ us-gaap_TitleOfIndividualAxis
= cga_MrYizhaoZhangMember
    40,000us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
/ us-gaap_TitleOfIndividualAxis
= cga_MrYizhaoZhangMember
   
Ms Yiru Shi [Member]              
Stockholders Equity [Line Items]              
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures   30,000us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
/ us-gaap_TitleOfIndividualAxis
= cga_MsYiruShiMember
    30,000us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
/ us-gaap_TitleOfIndividualAxis
= cga_MsYiruShiMember
   
Mr Lianfu Liu [Member]              
Stockholders Equity [Line Items]              
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures   20,000us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
/ us-gaap_TitleOfIndividualAxis
= cga_MrLianfuLiuMember
    20,000us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
/ us-gaap_TitleOfIndividualAxis
= cga_MrLianfuLiuMember
   
Other Employees [Member]              
Stockholders Equity [Line Items]              
Stock Issued During Period, Shares, Restricted Stock Award, Gross         1,320,000us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross
/ us-gaap_TitleOfIndividualAxis
= cga_OtherEmployeesMember
   
Two Twenty Employees [Member]              
Stockholders Equity [Line Items]              
Stock Issued During Period, Shares, Restricted Stock Award, Gross   980,000us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross
/ us-gaap_TitleOfIndividualAxis
= cga_TwoTwentyEmployeesMember
         
Restricted Stock [Member]              
Stockholders Equity [Line Items]              
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options     $ 3,709,889us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember