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Biological assets (Details) - USD ($) | Sep. 30, 2024 | Sep. 30, 2023
--- | --- | ---
Biological assets |  |
Biological assets | $ 30,358,304 | $ 29,199,895
Less: accumulated depreciation | (1,835,401) | (844,306)
Biological assets, net | $ 28,522,903 | $ 28,355,589

X
- References No definition available. + Details
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Namespace Prefix: | cney_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- References No definition available. + Details
Name: | cney_BiologicalAssetsGross
Namespace Prefix: | cney_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | cney_BiologicalAssetsNet
Namespace Prefix: | cney_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant