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RESTRICTED CASH (Narrative) (Details) (Bankers Acceptance [Member]) | 12 Months Ended
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Dec. 31, 2014
Bankers Acceptance [Member] |
Restricted Cash and Cash Equivalents Items [Line Items] |
Bank acceptance maturity period | 6 months

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- Definition Debt Instrument Maturity Period. + References No definition available. + Details
Name: | creg_DebtInstrumentMaturityPeriod
Namespace Prefix: | creg_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration