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CONTINGENCIES (Narrative) (Details)
12 Months Ended 36 Months Ended 12 Months Ended 3 Months Ended
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Dec. 31, 2014
Xi'an TCH [Member]
USD ($)
Dec. 31, 2014
Xi'an TCH [Member]
CNY
Dec. 31, 2013
Xi'an TCH [Member]
USD ($)
Dec. 31, 2013
Xi'an TCH [Member]
CNY
Dec. 31, 2012
Xi'an TCH [Member]
USD ($)
Dec. 31, 2012
Xi'an TCH [Member]
CNY
Dec. 31, 2014
Xi'an TCH [Member]
USD ($)
Dec. 31, 2014
Xi'an TCH [Member]
CNY
Mar. 31, 2014
Xi'an TCH [Member]
USD ($)
Mar. 31, 2014
Xi'an TCH [Member]
CNY
Dec. 31, 2014
Xi'an TCH [Member]
Third Party [Member]
USD ($)
Dec. 31, 2014
Xi'an TCH [Member]
Third Party [Member]
CNY
Mar. 31, 2014
Xi'an TCH [Member]
PRC [Member]
USD ($)
Mar. 31, 2014
Xi'an TCH [Member]
PRC [Member]
CNY
Schedule Of Contingencies [Line Items]                                
Project period                 3 years 3 years            
Estimated taxable income             $ 9,000,000creg_EstimatedTaxableIncome
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_XiantChenergyTechColtdMemberMember
56,900,000creg_EstimatedTaxableIncome
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_XiantChenergyTechColtdMemberMember
               
Accumulated sales 18,868,632us-gaap_SalesRevenueNet 62,013,135us-gaap_SalesRevenueNet         20,500,000us-gaap_SalesRevenueNet
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_XiantChenergyTechColtdMemberMember
129,000,000us-gaap_SalesRevenueNet
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_XiantChenergyTechColtdMemberMember
52,800,000us-gaap_SalesRevenueNet
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_XiantChenergyTechColtdMemberMember
320,000,000us-gaap_SalesRevenueNet
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_XiantChenergyTechColtdMemberMember
        52,800,000us-gaap_SalesRevenueNet
/ dei_LegalEntityAxis
= creg_PrcMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_XiantChenergyTechColtdMemberMember
320,000,000us-gaap_SalesRevenueNet
/ dei_LegalEntityAxis
= creg_PrcMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_XiantChenergyTechColtdMemberMember
Taxable income             9,500,000creg_TaxableIncome
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_XiantChenergyTechColtdMemberMember
59,800,000creg_TaxableIncome
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_XiantChenergyTechColtdMemberMember
               
Total accumulated taxable income target                 9,000,000creg_TotalAccumulatedTaxableIncomeTarget
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_XiantChenergyTechColtdMemberMember
56,900,000creg_TotalAccumulatedTaxableIncomeTarget
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_XiantChenergyTechColtdMemberMember
           
Probability of achieving accumulated sales         24,900,000creg_ProbabilityOfAchievingAccumulatedSales
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_XiantChenergyTechColtdMemberMember
154,000,000creg_ProbabilityOfAchievingAccumulatedSales
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_XiantChenergyTechColtdMemberMember
                   
Operating leases future monthly minimum payments due                     7,400,000creg_OperatingLeasesFutureMonthlyMinimumPaymentsDue
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_XiantChenergyTechColtdMemberMember
45,000,000creg_OperatingLeasesFutureMonthlyMinimumPaymentsDue
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_XiantChenergyTechColtdMemberMember
       
Payment of cash to third party                         149,700creg_PaymentOfCashToThirdParty
/ dei_LegalEntityAxis
= creg_ThirdPartyMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_XiantChenergyTechColtdMemberMember
945,000creg_PaymentOfCashToThirdParty
/ dei_LegalEntityAxis
= creg_ThirdPartyMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_XiantChenergyTechColtdMemberMember
   
Other income     349,300us-gaap_OtherIncome
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_XiantChenergyTechColtdMemberMember
2,210,000us-gaap_OtherIncome
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_XiantChenergyTechColtdMemberMember
                       
Subsidy income     499,000creg_SegmentReportingInformationRevenues
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_XiantChenergyTechColtdMemberMember
3,150,000creg_SegmentReportingInformationRevenues
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_XiantChenergyTechColtdMemberMember
                       
Notes Payable, Related Parties, Current     $ 0us-gaap_NotesPayableRelatedPartiesClassifiedCurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_XiantChenergyTechColtdMemberMember
  $ 656,071us-gaap_NotesPayableRelatedPartiesClassifiedCurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_XiantChenergyTechColtdMemberMember
4,000,000us-gaap_NotesPayableRelatedPartiesClassifiedCurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_XiantChenergyTechColtdMemberMember
    $ 0us-gaap_NotesPayableRelatedPartiesClassifiedCurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_XiantChenergyTechColtdMemberMember