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STATUTORY RESERVES (Registered Statutory Reserve Amount for Each Chinese Subsidiary) (Details) | 3 Months Ended
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Mar. 31, 2013
Statutory Surplus Reserve Fund [Member] |
Subsidiary or Equity Method Investee [Line Items] |
Percentage of income transferred to retained earnings appropriated for legal reserve | 10.00%
Statutory Surplus Reserve Fund [Member] | Maximum [Member] |
Subsidiary or Equity Method Investee [Line Items] |
Statutory surplus reserve fund percentage | 50.00%
Statutory Surplus Reserve Fund [Member] | Minimum [Member] |
Subsidiary or Equity Method Investee [Line Items] |
Percentage of total remaining reserve | 25.00%
Common Welfare Fund [Member] | Maximum [Member] |
Subsidiary or Equity Method Investee [Line Items] |
Percentage of consolidated net income | 10.00%
Common Welfare Fund [Member] | Minimum [Member] |
Subsidiary or Equity Method Investee [Line Items] |
Percentage of consolidated net income | 5.00%

X
- Definition Percentage Of Consolidated Net Income. + References No definition available. + Details
Name: | creg_PercentageOfConsolidatedNetIncome
Namespace Prefix: | creg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage Of Income Transferred To Retained Earnings Appropriated For Legal Reserve. + References No definition available. + Details
Name: | creg_PercentageOfIncomeTransferredToRetainedEarningsAppropriatedForLegalReserve
Namespace Prefix: | creg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage Of Total Remaining Reserve. + References No definition available. + Details
Name: | creg_PercentageOfTotalRemainingReserve
Namespace Prefix: | creg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Statutory Surplus Reserve Fund Percentage. + References No definition available. + Details
Name: | creg_StatutorySurplusReserveFundPercentage
Namespace Prefix: | creg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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