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STATUTORY RESERVES (Narrative) (Details)
 12 Months Ended
Dec. 31, 2014
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%creg_PercentageOfIncomeTransferredToRetainedEarningsAppropriatedForLegalReserve
/ us-gaap_ValuationAllowancesAndReservesTypeAxis
= creg_StatutorySurplusReserveFundMember
Statutory Surplus Reserve Fund [Member] | Maximum [Member]  
Subsidiary or Equity Method Investee [Line Items]  
Statutory surplus reserve fund percentage 50.00%creg_StatutorySurplusReserveFundPercentage
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ValuationAllowancesAndReservesTypeAxis
= creg_StatutorySurplusReserveFundMember
Statutory Surplus Reserve Fund [Member] | Minimum [Member]  
Subsidiary or Equity Method Investee [Line Items]  
Percentage of total remaining reserve 25.00%creg_PercentageOfTotalRemainingReserve
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ValuationAllowancesAndReservesTypeAxis
= creg_StatutorySurplusReserveFundMember
Common Welfare Fund [Member] | Maximum [Member]  
Subsidiary or Equity Method Investee [Line Items]  
Percentage of income transferred to retained earnings appropriated for legal reserve 10.00%creg_PercentageOfIncomeTransferredToRetainedEarningsAppropriatedForLegalReserve
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ValuationAllowancesAndReservesTypeAxis
= creg_CommonWelfareFundMember
Common Welfare Fund [Member] | Minimum [Member]  
Subsidiary or Equity Method Investee [Line Items]  
Percentage of income transferred to retained earnings appropriated for legal reserve 5.00%creg_PercentageOfIncomeTransferredToRetainedEarningsAppropriatedForLegalReserve
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ValuationAllowancesAndReservesTypeAxis
= creg_CommonWelfareFundMember