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v3.8.0.1

Other Receivables (Details) - USD ($) | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Other Receivables (Textual) |  |
Advance to third party | $ 7,652 | $ 530,000
Maintenance cost and tax receivable | $ 3,060,000 |
Advances to employees |  | $ 20,000

X
- Definition It represent the value of employees advance. + References No definition available. + Details
Name: | creg_AdvanceToEmployees
Namespace Prefix: | creg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition It represent the value of third party advance. + References No definition available. + Details
Name: | creg_AdvanceToThirdParty
Namespace Prefix: | creg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition It represent the value of maintenance cost and tax receivable. + References No definition available. + Details
Name: | creg_MaintenanceCostAndTaxReceivable
Namespace Prefix: | creg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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