Other Receivables (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Other Receivables (Textual)
Advance to third party	$ 10	$ 530
Maintenance cost and tax receivable	1,630
Advance to employees	$ 20	$ 20

It represent the value of maintenance cost and tax receivable.

No definition available.

Name:	creg_MaintenanceCostAndTaxReceivable
Namespace Prefix:	creg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant