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Restricted Cash | 12 Months Ended
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Dec. 31, 2016
Restricted Cash [Abstract] |
RESTRICTED CASH | 3. RESTRICTED CASH Restricted cash is held by the banks as collateral to issue bank acceptances and bank loans. The Company endorses bank acceptances to vendors as payment of its obligations. Most of the bank acceptances have maturities of less than six months. As of December 31, 2016 and 2015, the Company had restricted cash of $0 and $1.13 million.

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- Definition The entire disclosure represents cash and cash items which are restricted as to withdrawal or usage. The provisions of any restrictions are described in a note to the financial statements. + References No definition available. + Details
Name: | creg_RestrictedCashTextBlock
Namespace Prefix: | creg_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_RestrictedCashAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration