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Other Receivables (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Other Receivables (Textual)
Advance to third party	$ 530	$ 50
Advance to employees	$ 20	40
Maintenance cost and tax receivable		$ 470

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