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Commitments and Contingencies (Details) - Schedule of payments for lease expenses | Sep. 30, 2021 USD ($)
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Schedule of payments for lease expenses [Abstract] |
2022 | $ 139,475
2023 | 139,475
2024 | 139,475
2025 | 139,475
2026 | $ 139,475

X
- References No definition available. + Details
Name: | cga_OperatingLeasesFutureMinimumPaymentDueCurrent
Namespace Prefix: | cga_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | cga_OperatingLeasesFutureMinimumPaymentDueInFiveYears
Namespace Prefix: | cga_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | cga_OperatingLeasesFutureMinimumPaymentDueInFourYears
Namespace Prefix: | cga_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | cga_OperatingLeasesFutureMinimumPaymentDueInThreeYears
Namespace Prefix: | cga_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | cga_OperatingLeasesFutureMinimumPaymentDueInTwoYears
Namespace Prefix: | cga_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | cga_ScheduleOfPaymentsForLeaseExpensesAbstract
Namespace Prefix: | cga_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration