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ORGANIZATION AND DESCRIPTION OF BUSINESS (Narrative) (Details)
 1 Months Ended 12 Months Ended 1 Months Ended 0 Months Ended 1 Months Ended 1 Months Ended 12 Months Ended 0 Months Ended 1 Months Ended 1 Months Ended 0 Months Ended 0 Months Ended 1 Months Ended 0 Months Ended 1 Months Ended 0 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended 0 Months Ended 1 Months Ended 0 Months Ended 1 Months Ended 1 Months Ended
Dec. 31, 2014
USD ($)
Dec. 31, 2014
CNY
Jun. 28, 2014
USD ($)
Jun. 28, 2014
CNY
Sep. 24, 2014
Assets Repurchase Agreement [Member]
USD ($)
Dec. 31, 2014
Rongfeng [Member]
Mar. 26, 2014
Baoliyuan [Member]
Mar. 26, 2014
Baoliyuan [Member]
Payment Period One [Member]
USD ($)
Mar. 26, 2014
Baoliyuan [Member]
Payment Period One [Member]
CNY
Mar. 26, 2014
Baoliyuan [Member]
Payment Period Two [Member]
USD ($)
Mar. 26, 2014
Baoliyuan [Member]
Payment Period Two [Member]
CNY
Sep. 24, 2014
TRT System [Member]
USD ($)
Sep. 24, 2014
TRT System [Member]
CNY
Dec. 22, 2014
Zhonggang [Member]
USD ($)
Dec. 22, 2014
Zhonggang [Member]
CNY
Sep. 11, 2013
Biomass Power Generation Asset Transfer Agreement [Member]
USD ($)
MW
Sep. 11, 2013
Biomass Power Generation Asset Transfer Agreement [Member]
CNY
Jun. 29, 2010
Biomass Power Generation Project Lease Agreement [Member]
USD ($)
MW
Jun. 29, 2010
Biomass Power Generation Project Lease Agreement [Member]
CNY
Dec. 22, 2014
Xi'an Zhonghong New Energy Technology Co., Ltd [Member]
USD ($)
Dec. 22, 2014
Xi'an Zhonghong New Energy Technology Co., Ltd [Member]
CNY
Jul. 19, 2013
Xi'an Zhonghong New Energy Technology Co., Ltd [Member]
USD ($)
Jul. 19, 2013
Xi'an Zhonghong New Energy Technology Co., Ltd [Member]
CNY
Jul. 18, 2013
Xi'an Zhonghong New Energy Technology Co., Ltd [Member]
Jul. 24, 2013
Boxing County Chengli Gas Supply Co Ltd [Member]
Jul. 22, 2013
Boxing County Chengli Gas Supply Co Ltd [Member]
USD ($)
Jul. 22, 2013
Boxing County Chengli Gas Supply Co Ltd [Member]
CNY
Jul. 22, 2013
Boxing County Chengli Gas Supply Co Ltd [Member]
EPC General Contractor Agreement [Member]
USD ($)
Jul. 22, 2013
Boxing County Chengli Gas Supply Co Ltd [Member]
EPC General Contractor Agreement [Member]
CNY
Dec. 31, 2014
Waste Heat Power Generation Projects [Member]
USD ($)
Oct. 08, 2012
Shenqiu Project [Member]
USD ($)
Oct. 08, 2012
Shenqiu Project [Member]
CNY
Sep. 28, 2011
Shenqiu Project [Member]
USD ($)
MW
Sep. 28, 2011
Shenqiu Project [Member]
CNY
May 25, 2011
Shenqiu Project [Member]
USD ($)
May 25, 2011
Shenqiu Project [Member]
CNY
Jun. 25, 2013
Hongyuan Huifu [Member]
Jul. 24, 2013
Chengli Waste Heat Power Generation Projects [Member]
Jul. 19, 2013
Tianyu Waste Heat Power Generation Project [Member]
Dec. 06, 2013
Zhongtai Waste Heat Power Generation Energy Management Cooperative Agreement [Member]
Apr. 14, 2009
Erdos Metallurgy Company Limited [Member]
USD ($)
Apr. 14, 2009
Erdos Metallurgy Company Limited [Member]
CNY
Apr. 14, 2009
Erdos Metallurgy Company Limited [Member]
Initial Investment [Member]
USD ($)
Apr. 14, 2009
Erdos Metallurgy Company Limited [Member]
Initial Investment [Member]
CNY
Jun. 15, 2013
Erdos Tch [Member]
USD ($)
Jun. 15, 2013
Erdos Tch [Member]
CNY
Aug. 31, 2013
Erdos Tch [Member]
USD ($)
Apr. 14, 2009
Erdos Tch [Member]
Aug. 31, 2013
Erdos Tch [Member]
Phase One [Member]
MW
Aug. 31, 2013
Erdos Tch [Member]
Phase Two [Member]
MW
Feb. 28, 2011
Erdos Tch [Member]
Shanxi Datong Coal Group Steel Co Ltd [Member]
Apr. 14, 2009
Erdos Tch [Member]
Initial Investment [Member]
Apr. 14, 2009
Erdos Tch [Member]
After Return Of Initial Investment [Member]
Feb. 28, 2011
Erdos Tch [Member]
Location One [Member]
Shanxi Datong Coal Group Steel Co Ltd [Member]
Oct. 08, 2012
Xian Tch [Member]
Jul. 31, 2013
Xian Tch [Member]
USD ($)
Jun. 25, 2013
Xian Tch [Member]
Dec. 31, 2014
Xian Tch [Member]
Jun. 28, 2014
Xian Tch [Member]
USD ($)
Jun. 28, 2014
Xian Tch [Member]
CNY
Aug. 31, 2013
Xian Tch [Member]
Apr. 14, 2009
Xian Tch [Member]
Dec. 22, 2014
Xian Tch [Member]
Waste Heat Power Generation Projects [Member]
USD ($)
Dec. 22, 2014
Xian Tch [Member]
Waste Heat Power Generation Projects [Member]
CNY
Sep. 30, 2010
Xian Tch [Member]
Clean Development Mechanism [Member]
Feb. 28, 2011
Xian Tch [Member]
Shanxi Datong Coal Group Steel Co Ltd [Member]
USD ($)
Feb. 28, 2011
Xian Tch [Member]
Shanxi Datong Coal Group Steel Co Ltd [Member]
CNY
May 31, 2013
Xian Tch [Member]
Sinosteel Jilin Ferroalloys Co Ltd Jitie [Member]
USD ($)
MW
May 31, 2013
Xian Tch [Member]
Sinosteel Jilin Ferroalloys Co Ltd Jitie [Member]
CNY
Jun. 25, 2013
Xian Tch [Member]
Hongyuan Huifu [Member]
USD ($)
Jun. 25, 2013
Xian Tch [Member]
Hongyuan Huifu [Member]
CNY
Jun. 28, 2014
Xian Tch [Member]
Qitaihe City Boli Yida Coal Selection Co Ltd Yida [Member]
USD ($)
Jun. 28, 2014
Xian Tch [Member]
Qitaihe City Boli Yida Coal Selection Co Ltd Yida [Member]
CNY
Dec. 31, 2014
Xian Tch [Member]
Qitaihe City Boli Yida Coal Selection Co Ltd Yida [Member]
USD ($)
Apr. 14, 2009
Xian Tch [Member]
Initial Investment [Member]
Apr. 14, 2009
Xian Tch [Member]
After Return Of Initial Investment [Member]
Oct. 08, 2012
Xian Tch [Member]
Biomass Power Generation System [Member]
USD ($)
Oct. 08, 2012
Xian Tch [Member]
Biomass Power Generation System [Member]
CNY
Mar. 30, 2013
Xian Tch [Member]
Biomass Power Generation System [Member]
May 31, 2013
Xian Tch [Member]
Minimum [Member]
Sinosteel Jilin Ferroalloys Co Ltd Jitie [Member]
MW
May 31, 2013
Xian Tch [Member]
Maximum [Member]
Sinosteel Jilin Ferroalloys Co Ltd Jitie [Member]
MW
Jul. 18, 2013
Huahong New Energy Technology Co Ltd [Member]
Sep. 30, 2010
Zhongbao [Member]
MW
Sep. 30, 2010
Zhongbao [Member]
Clean Development Mechanism [Member]
Jun. 10, 2013
Xian TCH And Shanxi Datong [Member]
First Five Years [Member]
USD ($)
Jun. 10, 2013
Xian TCH And Shanxi Datong [Member]
First Five Years [Member]
CNY
Jun. 10, 2013
Xian TCH And Shanxi Datong [Member]
Second Five Years [Member]
USD ($)
Jun. 10, 2013
Xian TCH And Shanxi Datong [Member]
Second Five Years [Member]
CNY
Jun. 10, 2013
Xian TCH And Shanxi Datong [Member]
Minimum Ten Years [Member]
USD ($)
Jun. 10, 2013
Xian TCH And Shanxi Datong [Member]
Minimum Ten Years [Member]
CNY
Jun. 10, 2013
Xian TCH And Shanxi Datong [Member]
MaximumTen Years [Member]
USD ($)
Jun. 10, 2013
Xian TCH And Shanxi Datong [Member]
MaximumTen Years [Member]
CNY
Jul. 18, 2013
HYREF Fund [Member]
USD ($)
Jul. 18, 2013
HYREF Fund [Member]
CNY
Jul. 18, 2013
HYREF Fund [Member]
China Orient Asset Management Co., Ltd [Member]
USD ($)
Jul. 18, 2013
HYREF Fund [Member]
China Orient Asset Management Co., Ltd [Member]
CNY
Jul. 18, 2013
HYREF Fund [Member]
Xi'an TCH Limited Partners [Member]
USD ($)
Jul. 18, 2013
HYREF Fund [Member]
Xi'an TCH Limited Partners [Member]
CNY
Jul. 18, 2013
HYREF Fund [Member]
Hongyuan Huifu [Member]
USD ($)
Jul. 18, 2013
HYREF Fund [Member]
Hongyuan Huifu [Member]
CNY
Jun. 25, 2013
Hongyuan Recycling Energy Investment Management Beijing Co Ltd [Member]
CNY
Organization and Nature Of Operations [Line Items]                                                                                                                                                                                                          
Capacity of plant                                                             12creg_PlantCapacity
/ creg_ProjectAxis
= creg_ShenqiuProjectMember		 12creg_PlantCapacity
/ creg_ProjectAxis
= creg_ShenqiuProjectMember		                                     3creg_PlantCapacity
/ dei_LegalEntityAxis
= creg_ErdosTchMember
/ creg_ProjectAxis
= creg_ShanxiDatongCoalGroupSteelCoLtdMember		     15creg_PlantCapacity
/ dei_EntityByLocationAxis
= creg_LocationOneMember
/ dei_LegalEntityAxis
= creg_ErdosTchMember
/ creg_ProjectAxis
= creg_ShanxiDatongCoalGroupSteelCoLtdMember		 24creg_PlantCapacity
/ dei_LegalEntityAxis
= creg_XianTchMember		                                 15creg_PlantCapacity
/ dei_LegalEntityAxis
= creg_XianTchMember
/ creg_ProjectAxis
= creg_QitaiheCityBoliYidaCoalSelectionCoLtdYidaMember		 15creg_PlantCapacity
/ dei_LegalEntityAxis
= creg_XianTchMember
/ creg_ProjectAxis
= creg_QitaiheCityBoliYidaCoalSelectionCoLtdYidaMember		                                                        
Term of joint ventures                                                                                 20 years 20 years                                                                                                                      
Investment cost                                                                                 $ 79,000,000us-gaap_InvestmentOwnedAtCost
/ dei_LegalEntityAxis
= creg_ErdosMetallurgyCompanyLimitedMember		 500,000,000us-gaap_InvestmentOwnedAtCost
/ dei_LegalEntityAxis
= creg_ErdosMetallurgyCompanyLimitedMember		 $ 17,550,000us-gaap_InvestmentOwnedAtCost
/ dei_LegalEntityAxis
= creg_ErdosMetallurgyCompanyLimitedMember
/ us-gaap_StatementScenarioAxis
= creg_InitialInvestmentMember		 120,000,000us-gaap_InvestmentOwnedAtCost
/ dei_LegalEntityAxis
= creg_ErdosMetallurgyCompanyLimitedMember
/ us-gaap_StatementScenarioAxis
= creg_InitialInvestmentMember		                             $ 490,000us-gaap_InvestmentOwnedAtCost
/ dei_LegalEntityAxis
= creg_XianTchMember		 3,000,000us-gaap_InvestmentOwnedAtCost
/ dei_LegalEntityAxis
= creg_XianTchMember		           $ 28,600,000us-gaap_InvestmentOwnedAtCost
/ dei_LegalEntityAxis
= creg_XianTchMember
/ creg_ProjectAxis
= creg_ShanxiDatongCoalGroupSteelCoLtdMember		 180,000,000us-gaap_InvestmentOwnedAtCost
/ dei_LegalEntityAxis
= creg_XianTchMember
/ creg_ProjectAxis
= creg_ShanxiDatongCoalGroupSteelCoLtdMember		 $ 9,710,000us-gaap_InvestmentOwnedAtCost
/ dei_LegalEntityAxis
= creg_XianTchMember
/ creg_ProjectAxis
= creg_SinosteelJilinFerroalloysCoLtdJitieMember		 60,000,000us-gaap_InvestmentOwnedAtCost
/ dei_LegalEntityAxis
= creg_XianTchMember
/ creg_ProjectAxis
= creg_SinosteelJilinFerroalloysCoLtdJitieMember		     $ 18,690,000us-gaap_InvestmentOwnedAtCost
/ dei_LegalEntityAxis
= creg_XianTchMember
/ creg_ProjectAxis
= creg_QitaiheCityBoliYidaCoalSelectionCoLtdYidaMember		 115,000,000us-gaap_InvestmentOwnedAtCost
/ dei_LegalEntityAxis
= creg_XianTchMember
/ creg_ProjectAxis
= creg_QitaiheCityBoliYidaCoalSelectionCoLtdYidaMember		                                                        
Contribution percentage in total investment                                           90.00%creg_PercentageOfCapitalContribution
/ creg_LimitedPartnersAxis
= creg_XianZhonghongNewEnergyTechnologyCoMember		 90.00%creg_PercentageOfCapitalContribution
/ creg_LimitedPartnersAxis
= creg_XianZhonghongNewEnergyTechnologyCoMember		 90.00%creg_PercentageOfCapitalContribution
/ creg_LimitedPartnersAxis
= creg_XianZhonghongNewEnergyTechnologyCoMember		                                         7.00%creg_PercentageOfCapitalContribution
/ dei_LegalEntityAxis
= creg_ErdosTchMember		 7.00%creg_PercentageOfCapitalContribution
/ dei_LegalEntityAxis
= creg_ErdosTchMember		   7.00%creg_PercentageOfCapitalContribution
/ dei_LegalEntityAxis
= creg_ErdosTchMember		                           93.00%creg_PercentageOfCapitalContribution
/ dei_LegalEntityAxis
= creg_XianTchMember		                                                                              
Profit distribution percentage                                                                         80.00%creg_PercentageShareOfGainLossFromJointVenture
/ creg_ProjectAxis
= creg_HongyuanHuifuMember		                             20.00%creg_PercentageShareOfGainLossFromJointVenture
/ dei_LegalEntityAxis
= creg_ErdosTchMember
/ us-gaap_StatementScenarioAxis
= creg_InitialInvestmentMember		 40.00%creg_PercentageShareOfGainLossFromJointVenture
/ dei_LegalEntityAxis
= creg_ErdosTchMember
/ us-gaap_StatementScenarioAxis
= creg_AfterReturnOfInitialInvestmentMember		       20.00%creg_PercentageShareOfGainLossFromJointVenture
/ dei_LegalEntityAxis
= creg_XianTchMember		               40.00%creg_PercentageShareOfGainLossFromJointVenture
/ dei_LegalEntityAxis
= creg_XianTchMember
/ creg_ProjectAxis
= creg_CleanDevelopmentMechanismMember		                   80.00%creg_PercentageShareOfGainLossFromJointVenture
/ dei_LegalEntityAxis
= creg_XianTchMember
/ us-gaap_StatementScenarioAxis
= creg_InitialInvestmentMember		 60.00%creg_PercentageShareOfGainLossFromJointVenture
/ dei_LegalEntityAxis
= creg_XianTchMember
/ us-gaap_StatementScenarioAxis
= creg_AfterReturnOfInitialInvestmentMember		               60.00%creg_PercentageShareOfGainLossFromJointVenture
/ dei_LegalEntityAxis
= creg_ZhongbaoMember
/ creg_ProjectAxis
= creg_CleanDevelopmentMechanismMember		                                 40.00%creg_PercentageShareOfGainLossFromJointVenture
/ dei_LegalEntityAxis
= creg_HongyuanRecyclingEnergyInvestmentManagementBeijingCoLtdMember
Construction cost                                                                                         1,290,000us-gaap_ConstructionAndDevelopmentCosts
/ dei_LegalEntityAxis
= creg_ErdosTchMember		 8,000,000us-gaap_ConstructionAndDevelopmentCosts
/ dei_LegalEntityAxis
= creg_ErdosTchMember		                                                                                                              
Terms of contracts                                                                                                                                                                     9 years                                    
Leasing fees                                   279,400creg_LeaseRevenuesAndFees
/ creg_ContractAgreementAxis
= creg_BiomassPowerGenerationProjectLeaseAgreementMember		 1,900,000creg_LeaseRevenuesAndFees
/ creg_ContractAgreementAxis
= creg_BiomassPowerGenerationProjectLeaseAgreementMember		                           286,000creg_LeaseRevenuesAndFees
/ creg_ProjectAxis
= creg_ShenqiuProjectMember		 1,800,000creg_LeaseRevenuesAndFees
/ creg_ProjectAxis
= creg_ShenqiuProjectMember		                                                                                     239,000creg_LeaseRevenuesAndFees
/ dei_LegalEntityAxis
= creg_XianTchMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= creg_BiomassPowerGenerationSystemMember		 1.5creg_LeaseRevenuesAndFees
/ dei_LegalEntityAxis
= creg_XianTchMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= creg_BiomassPowerGenerationSystemMember		                                              
Lease period                                   15 years 15 years           20 years               11 years 11 years                                                                   24 years 24 years                   9 years 6 months                                            
Total cost of project                                                             11,100,000creg_TotalCostOfProject
/ creg_ProjectAxis
= creg_ShenqiuProjectMember		 68,000,000creg_TotalCostOfProject
/ creg_ProjectAxis
= creg_ShenqiuProjectMember		                                                                                                                                          
Original investment by subsidiary                                           4,850,000creg_OriginalInvestmentBySubsidiary
/ creg_LimitedPartnersAxis
= creg_XianZhonghongNewEnergyTechnologyCoMember		 30,000,000creg_OriginalInvestmentBySubsidiary
/ creg_LimitedPartnersAxis
= creg_XianZhonghongNewEnergyTechnologyCoMember		                                                                                             650,000,000,000creg_OriginalInvestmentBySubsidiary
/ dei_LegalEntityAxis
= creg_XianTchMember
/ creg_ProjectAxis
= creg_HongyuanHuifuMember		 4,000,000creg_OriginalInvestmentBySubsidiary
/ dei_LegalEntityAxis
= creg_XianTchMember
/ creg_ProjectAxis
= creg_HongyuanHuifuMember		                                           830,000,000,000creg_OriginalInvestmentBySubsidiary
/ dei_LegalEntityAxis
= creg_HyrefFundMember		 5,000,000creg_OriginalInvestmentBySubsidiary
/ dei_LegalEntityAxis
= creg_HyrefFundMember		             10,000,000creg_OriginalInvestmentBySubsidiary
/ dei_LegalEntityAxis
= creg_HongyuanRecyclingEnergyInvestmentManagementBeijingCoLtdMember
Consideration of thermal power generation project                                                                     3,570,000creg_ConsiderationOfThermalPowerGenerationProject
/ creg_ProjectAxis
= creg_ShenqiuProjectMember		 22,500,000creg_ConsiderationOfThermalPowerGenerationProject
/ creg_ProjectAxis
= creg_ShenqiuProjectMember		                                                                                                                                  
Minimum service fee                                                                                                                                       300,000creg_MinimumServiceFee
/ dei_LegalEntityAxis
= creg_XianTchMember
/ creg_ProjectAxis
= creg_SinosteelJilinFerroalloysCoLtdJitieMember		 1,800,000creg_MinimumServiceFee
/ dei_LegalEntityAxis
= creg_XianTchMember
/ creg_ProjectAxis
= creg_SinosteelJilinFerroalloysCoLtdJitieMember		                               190,000creg_MinimumServiceFee
/ dei_LegalEntityAxis
= creg_XianTchAndShanxiDatongMember
/ creg_ProjectAxis
= creg_FirstFiveYearsMember		 1,200,000creg_MinimumServiceFee
/ dei_LegalEntityAxis
= creg_XianTchAndShanxiDatongMember
/ creg_ProjectAxis
= creg_FirstFiveYearsMember		 180,000creg_MinimumServiceFee
/ dei_LegalEntityAxis
= creg_XianTchAndShanxiDatongMember
/ creg_ProjectAxis
= creg_SecondFiveYearsMember		 1,100,000creg_MinimumServiceFee
/ dei_LegalEntityAxis
= creg_XianTchAndShanxiDatongMember
/ creg_ProjectAxis
= creg_SecondFiveYearsMember		 160,000creg_MinimumServiceFee
/ dei_LegalEntityAxis
= creg_XianTchAndShanxiDatongMember
/ creg_ProjectAxis
= creg_MinimumTenYearsMember		 1,000,000creg_MinimumServiceFee
/ dei_LegalEntityAxis
= creg_XianTchAndShanxiDatongMember
/ creg_ProjectAxis
= creg_MinimumTenYearsMember		 150,000creg_MinimumServiceFee
/ dei_LegalEntityAxis
= creg_XianTchAndShanxiDatongMember
/ creg_ProjectAxis
= creg_MaximumtenYearsMember		 900,000creg_MinimumServiceFee
/ dei_LegalEntityAxis
= creg_XianTchAndShanxiDatongMember
/ creg_ProjectAxis
= creg_MaximumtenYearsMember		                  
Installed Plant Capacity                               12creg_InstalledPlantCapacity
/ creg_ContractAgreementAxis
= creg_BiomassPowerGenerationAssetTransferAgreementMember		 12creg_InstalledPlantCapacity
/ creg_ContractAgreementAxis
= creg_BiomassPowerGenerationAssetTransferAgreementMember		 12creg_InstalledPlantCapacity
/ creg_ContractAgreementAxis
= creg_BiomassPowerGenerationProjectLeaseAgreementMember		 12creg_InstalledPlantCapacity
/ creg_ContractAgreementAxis
= creg_BiomassPowerGenerationProjectLeaseAgreementMember		                           12creg_InstalledPlantCapacity
/ creg_ProjectAxis
= creg_ShenqiuProjectMember		 12creg_InstalledPlantCapacity
/ creg_ProjectAxis
= creg_ShenqiuProjectMember		                             18creg_InstalledPlantCapacity
/ dei_LegalEntityAxis
= creg_ErdosTchMember
/ creg_ProjectAxis
= creg_PhaseOneMember		 27creg_InstalledPlantCapacity
/ dei_LegalEntityAxis
= creg_ErdosTchMember
/ creg_ProjectAxis
= creg_PhaseTwoMember		                                   10.5creg_InstalledPlantCapacity
/ dei_LegalEntityAxis
= creg_XianTchMember
/ creg_ProjectAxis
= creg_SinosteelJilinFerroalloysCoLtdJitieMember		 10.5creg_InstalledPlantCapacity
/ dei_LegalEntityAxis
= creg_XianTchMember
/ creg_ProjectAxis
= creg_SinosteelJilinFerroalloysCoLtdJitieMember		                     3creg_InstalledPlantCapacity
/ dei_LegalEntityAxis
= creg_XianTchMember
/ creg_ProjectAxis
= creg_SinosteelJilinFerroalloysCoLtdJitieMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		 7.5creg_InstalledPlantCapacity
/ dei_LegalEntityAxis
= creg_XianTchMember
/ creg_ProjectAxis
= creg_SinosteelJilinFerroalloysCoLtdJitieMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		   7creg_InstalledPlantCapacity
/ dei_LegalEntityAxis
= creg_ZhongbaoMember		                                    
Subscribed amount of initial capital contribution                                                                                                                                                                                         75,000,000creg_SubscribedAmountOfInitialCapitalContribution
/ dei_LegalEntityAxis
= creg_HyrefFundMember		 460,000,000creg_SubscribedAmountOfInitialCapitalContribution
/ dei_LegalEntityAxis
= creg_HyrefFundMember		 46,670,000creg_SubscribedAmountOfInitialCapitalContribution
/ dei_LegalEntityAxis
= creg_HyrefFundMember
/ creg_LimitedPartnersAxis
= creg_ChinaOrientAssetManagementCoLtdMember		 280,000,000creg_SubscribedAmountOfInitialCapitalContribution
/ dei_LegalEntityAxis
= creg_HyrefFundMember
/ creg_LimitedPartnersAxis
= creg_ChinaOrientAssetManagementCoLtdMember		 12,500,000creg_SubscribedAmountOfInitialCapitalContribution
/ dei_LegalEntityAxis
= creg_HyrefFundMember
/ creg_LimitedPartnersAxis
= creg_XianTchLimitedPartnersMember		 75,000,000creg_SubscribedAmountOfInitialCapitalContribution
/ dei_LegalEntityAxis
= creg_HyrefFundMember
/ creg_LimitedPartnersAxis
= creg_XianTchLimitedPartnersMember		 16,670,000creg_SubscribedAmountOfInitialCapitalContribution
/ dei_LegalEntityAxis
= creg_HyrefFundMember
/ creg_ProjectAxis
= creg_HongyuanHuifuMember		 100,000,000creg_SubscribedAmountOfInitialCapitalContribution
/ dei_LegalEntityAxis
= creg_HyrefFundMember
/ creg_ProjectAxis
= creg_HongyuanHuifuMember		  
Total Fund Capital Contribution                                                                                                                                                                                         76,660,000creg_TotalFundCapitalContribution
/ dei_LegalEntityAxis
= creg_HyrefFundMember		 460,000,000creg_TotalFundCapitalContribution
/ dei_LegalEntityAxis
= creg_HyrefFundMember		              
Partnership Term                                                                                                                                                                   6 years                                      
Preferred Limited Partnership Term                                                                                                                                                                                         3 years 3 years              
Energy Saving Solution And Services Cost                       179,000creg_EnergySavingSolutionAndServicesCost
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_TrtSystemMember		 1,100,000creg_EnergySavingSolutionAndServicesCost
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_TrtSystemMember		 243,902creg_EnergySavingSolutionAndServicesCost
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_ZhonggangMember		 1,500,000creg_EnergySavingSolutionAndServicesCost
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_ZhonggangMember		         243,902,000,000creg_EnergySavingSolutionAndServicesCost
/ creg_LimitedPartnersAxis
= creg_XianZhonghongNewEnergyTechnologyCoMember		 1,500,000creg_EnergySavingSolutionAndServicesCost
/ creg_LimitedPartnersAxis
= creg_XianZhonghongNewEnergyTechnologyCoMember		 4,370,000creg_EnergySavingSolutionAndServicesCost
/ creg_LimitedPartnersAxis
= creg_XianZhonghongNewEnergyTechnologyCoMember		 27,000,000creg_EnergySavingSolutionAndServicesCost
/ creg_LimitedPartnersAxis
= creg_XianZhonghongNewEnergyTechnologyCoMember		                                                                                                                                                            
Total Contract Price For Materials Equipment                                                   66,680,000creg_TotalContractPriceForMaterialsEquipment
/ creg_LimitedPartnersAxis
= creg_BoxingCountyChengliGasSupplyCoLtdMember		 400,000,000creg_TotalContractPriceForMaterialsEquipment
/ creg_LimitedPartnersAxis
= creg_BoxingCountyChengliGasSupplyCoLtdMember		 33,340,000creg_TotalContractPriceForMaterialsEquipment
/ creg_ContractAgreementAxis
= creg_EpcGeneralContractorAgreementMember
/ creg_LimitedPartnersAxis
= creg_BoxingCountyChengliGasSupplyCoLtdMember		 200,000,000creg_TotalContractPriceForMaterialsEquipment
/ creg_ContractAgreementAxis
= creg_EpcGeneralContractorAgreementMember
/ creg_LimitedPartnersAxis
= creg_BoxingCountyChengliGasSupplyCoLtdMember		                                                                                                                                                
Purchase price for Power Generation Systems     18,690,000creg_PayableForPowerGenerationSystems 115,000,000creg_PayableForPowerGenerationSystems                       16,480,000creg_PayableForPowerGenerationSystems
/ creg_ContractAgreementAxis
= creg_BiomassPowerGenerationAssetTransferAgreementMember		 100,000,000creg_PayableForPowerGenerationSystems
/ creg_ContractAgreementAxis
= creg_BiomassPowerGenerationAssetTransferAgreementMember		                                                                                           9,760,000creg_PayableForPowerGenerationSystems
/ dei_LegalEntityAxis
= creg_XianTchMember
/ creg_LimitedPartnersAxis
= creg_WasteHeatPowerGenerationProjectsMember		 60,000,000creg_PayableForPowerGenerationSystems
/ dei_LegalEntityAxis
= creg_XianTchMember
/ creg_LimitedPartnersAxis
= creg_WasteHeatPowerGenerationProjectsMember		                                                                          
Common Stock Issuable For Power Generation Systems     8,233,779creg_CommonStockIssuableForPowerGenerationSystems 8,233,779creg_CommonStockIssuableForPowerGenerationSystems                       8,766,547creg_CommonStockIssuableForPowerGenerationSystems
/ creg_ContractAgreementAxis
= creg_BiomassPowerGenerationAssetTransferAgreementMember		 8,766,547creg_CommonStockIssuableForPowerGenerationSystems
/ creg_ContractAgreementAxis
= creg_BiomassPowerGenerationAssetTransferAgreementMember		                                                                                                             8,233,779creg_CommonStockIssuableForPowerGenerationSystems
/ dei_LegalEntityAxis
= creg_XianTchMember
/ creg_ProjectAxis
= creg_QitaiheCityBoliYidaCoalSelectionCoLtdYidaMember		 8,233,779creg_CommonStockIssuableForPowerGenerationSystems
/ dei_LegalEntityAxis
= creg_XianTchMember
/ creg_ProjectAxis
= creg_QitaiheCityBoliYidaCoalSelectionCoLtdYidaMember		                                                        
Common Stock Issuable Per Share For Power Generation Systems     $ 2.27creg_CommonStockIssuablePerShareForPowerGenerationSystems                         $ 1.87creg_CommonStockIssuablePerShareForPowerGenerationSystems
/ creg_ContractAgreementAxis
= creg_BiomassPowerGenerationAssetTransferAgreementMember		                                                                                                                                                                          
Lease Amount Per Month                               630,000creg_LeaseAmountPerMonth
/ creg_ContractAgreementAxis
= creg_BiomassPowerGenerationAssetTransferAgreementMember		 3,800,000creg_LeaseAmountPerMonth
/ creg_ContractAgreementAxis
= creg_BiomassPowerGenerationAssetTransferAgreementMember		                                                                                                                                                                        
Accumulated profit                                                                                             226,000creg_AccumulatedProfit
/ dei_LegalEntityAxis
= creg_ErdosTchMember		                                                                                                            
Consideration of power generation project                                                                 10,937,500creg_ConsiderationOfPowerGenerationProject
/ creg_ProjectAxis
= creg_ShenqiuProjectMember		 70creg_ConsiderationOfPowerGenerationProject
/ creg_ProjectAxis
= creg_ShenqiuProjectMember		                                                                                                                                      
Percentage of accumulated profit                                                                                                                         20.00%creg_PercentageOfAccumulatedProfit
/ dei_LegalEntityAxis
= creg_XianTchMember		                                                                                
Capacity per year                                                                                                                                                                     80,000creg_CapacityPerYear
/ dei_LegalEntityAxis
= creg_ZhongbaoMember		                                    
Minority interest decrease from redemptions                                                                                                               1.29us-gaap_MinorityInterestDecreaseFromRedemptions
/ dei_LegalEntityAxis
= creg_XianTchMember		                                                                                          
Ordinary limited partnership term                                                                                                                                                                                         4 years 4 years              
Partnership expiration                                                                                                                                                                                         Jul. 18, 2019 Jul. 18, 2019              
Fixed monthly fee for waste water treatment system               171,010creg_FixedMonthlyFeeForWasteWaterTreatmentSystem
/ creg_PaymentPeriodAxis
= creg_PaymentPeriodOneMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_BaoliyuanMember		 1,050,000creg_FixedMonthlyFeeForWasteWaterTreatmentSystem
/ creg_PaymentPeriodAxis
= creg_PaymentPeriodOneMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_BaoliyuanMember		 153,094creg_FixedMonthlyFeeForWasteWaterTreatmentSystem
/ creg_PaymentPeriodAxis
= creg_PaymentPeriodTwoMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_BaoliyuanMember		 940,000creg_FixedMonthlyFeeForWasteWaterTreatmentSystem
/ creg_PaymentPeriodAxis
= creg_PaymentPeriodTwoMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_BaoliyuanMember		                                                                                                                                                                                    
Description on termination of agreement           1) if it is less than five (5) years (including five (5) years) into the term when Rongfeng requests termination, Rongfeng shall pay: Xian TCHs total investment amount plus Xian TCHs average annual investment return times (five (5) years minus the years of which the system has already operated); 2) if it is more than five (5) years into the term when Rongfeng requests the termination, Rongfeng shall pay: Xian TCHs total investment amount minus total amortization cost (the amortization period is ten (10) years).                                                                                                                                                                                              
Security Deposit 338,079us-gaap_SecurityDeposit 2,130,000us-gaap_SecurityDeposit                                                                                                                                           490,000us-gaap_SecurityDeposit
/ dei_LegalEntityAxis
= creg_XianTchMember
/ creg_ProjectAxis
= creg_QitaiheCityBoliYidaCoalSelectionCoLtdYidaMember		 3,000,000us-gaap_SecurityDeposit
/ dei_LegalEntityAxis
= creg_XianTchMember
/ creg_ProjectAxis
= creg_QitaiheCityBoliYidaCoalSelectionCoLtdYidaMember		                                                        
Shares Issued, Price Per Share                                                                                                                                               $ 2.27us-gaap_SharesIssuedPricePerShare
/ dei_LegalEntityAxis
= creg_XianTchMember
/ creg_ProjectAxis
= creg_QitaiheCityBoliYidaCoalSelectionCoLtdYidaMember		   $ 1.76us-gaap_SharesIssuedPricePerShare
/ dei_LegalEntityAxis
= creg_XianTchMember
/ creg_ProjectAxis
= creg_QitaiheCityBoliYidaCoalSelectionCoLtdYidaMember		                                                      
Common Stock Value Issuable For Power Generation Systems                                                                                                                                               14,490,000creg_CommonStockValueIssuableForPowerGenerationSystems
/ dei_LegalEntityAxis
= creg_XianTchMember
/ creg_ProjectAxis
= creg_QitaiheCityBoliYidaCoalSelectionCoLtdYidaMember		                                                          
Lease Repurchase Price                       5,690,000creg_LeaseRepurchasePrice
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_TrtSystemMember		 35,000,000creg_LeaseRepurchasePrice
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_TrtSystemMember		 9,760,000creg_LeaseRepurchasePrice
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_ZhonggangMember		 60,000,000creg_LeaseRepurchasePrice
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= creg_ZhonggangMember		                                                                                                                                                                            
Sale Leaseback Transaction, Description             1) if it is less than five (5) years (including five (5) years) into the term when Baoliyuan requests termination, Baoliyuan shall pay: Xian TCHs total investment amount plus Xian TCHs average annual investment return times (five (5) years minus the years of which the system has already operated); 2) if it is more than five (5) years into the term when Baoliyuan requests the termination, Baoliyuan shall pay: Xian TCHs total investment amount minus total amortization cost (the amortization period is twenty (20) years).                                                                                                     (i)BMPG systems to Pucheng Phase I and II (15 and 11 year terms, respectively); (ii)BMPG systems to Shenqiu Phase I (11 year term); (iii)Shenqiu Phase II (9.5 year term); (iv)WHPG systems to Jitie (24 year term); (v) WGPG systems to Yida (15 year term); and (vi)two BPRT systems to Shanxi Datong (30 year term).                                                                                      
Accrued Investment Income Receivable         4,780,000us-gaap_AccruedInvestmentIncomeReceivable
/ us-gaap_SaleLeasebackTransactionDescriptionAxis
= creg_AssetsRepurchaseAgreementMember		                                                 8,040,000us-gaap_AccruedInvestmentIncomeReceivable
/ creg_LimitedPartnersAxis
= creg_WasteHeatPowerGenerationProjectsMember		                                                                                                                                              
Gain (Loss) on Investments         $ 980,000us-gaap_GainLossOnInvestments
/ us-gaap_SaleLeasebackTransactionDescriptionAxis
= creg_AssetsRepurchaseAgreementMember		                                                 $ 1,760,000us-gaap_GainLossOnInvestments
/ creg_LimitedPartnersAxis
= creg_WasteHeatPowerGenerationProjectsMember		                                                                                                                                              
Long-term Contract for Purchase of Electric Power, Description             The construction period of the CDQ Project is expected to be fifteen (15) months from the effective date of the Agreement. Baoliyuan will start to pay an energy saving fee from the date when the WHPG station passes the required 72 hour test run. The term of payment is for twenty (20) years and Baoliyuan shall pay an energy saving fee at RMB 0.7 ($0.114) per kilowatt hour (including tax) for the power generated from the system, from which Xian TCH shall take 92.86% and Baoliyuan shall take 7.14% as parties to share the energy saving benefits. During the term of the contract the energy saving fee shall be adjusted at the same percentage as the change of local grid electricity price. Baoliyuan shall provide guarantees to ensure it will fulfill its obligations under the Agreement. Upon the completion of the term, Xian TCH will transfer the systems to Baoliyuan at RMB 1                                                             The term of the Agreements is for twenty (20) years. The first 800 million watt hours generated by the Chengli Project will be charged at RMB 0.42 ($0.068) per kilowatt hour (excluding tax); thereafter, the energy saving fee will be RMB 0.20 ($0.036) per kilowatt hour (excluding tax). The operating time shall be based upon an average 8,000 hours annually. If the operating time is less than 8,000 hours per year due to a reason attributable to Chengli, then time charged shall be 8,000 hours a year, and if it is less than 8,000 hours due to a reason attributable to Zhonghong, then it shall be charged at actual operating hours. The construction of the Chengli Project is anticipated to be completed in the second quarter of 2015. When operations begin, Chengli shall ensure its coking production line works properly and that working hours for the CDQ system are at least 8,000 hours per year, and Zhonghong shall ensure that working hours and the CDQ WHPG system will be at least 7,200 hours per year. Upon completion of the Tianyu Project, Zhonghong will charge Tianyu an energy saving service fee of RMB 0.534 ($0.087) per kilowatt hour (excluding tax). The operating time will be based upon an average 8,000 hours annually for each of Xuzhou Tian'an and Xuzhou Huayu. If the operating time is less than 8,000 hours per year due to a reason attributable to Tianyu, then time charged will be 8,000 hours a year. The term of the Tianyu Agreement is twenty (20) years. The construction of the Tianyu Project is anticipated to be completed between the end of 2015 and the middle of 2016. Tianyu will provide the land for the CDQ systems and CDQ WHPG systems for free. Tianyu also guarantees that it will purchase all of the power generated by the CDQ WHPG systems The construction period of the Project is expected to be eighteen (18) months from the date when conditions are ready for construction to begin. Zhongtai will start to pay an energy saving service fee from the date when the WHPG station passes the required 72 hour test run. The term of payment is for twenty (20) years. For the first ten (10) years of the term, Zhongtai shall pay an energy saving service fee at RMB 0.534 ($0.089) per kilowatt hour (including value added tax) for the power generated from the system. For the second ten (10) years of the term, Zhongtai shall pay an energy saving service fee at RMB 0.402 ($0.067) per kilowatt hour (including value added tax). During the term of the contract the energy saving service fee shall be adjusted at the same percentage as the change of local grid electricity price. Zhongtai shall also pay an energy saving service fee for the steam supplied by Xian TCH at RMB 100 ($16.67) per ton (including value added tax). Zhongtai and its parent company will provide guarantees to ensure Zhongtai will fulfill its obligations under the Agreement. Upon the completion of the term, Xian TCH will transfer the systems to Zhongtai at RMB 1 ($0.16). Zhongtai shall provide waste heat to the systems for no less than 8,000 hours per year and waste gas volume no less than 150,000 Nm3 per hour with a temperature no less than 950C. If these requirements are not met, the term of the Agreement will be extended accordingly. If Zhongtai wants to terminate the Zhongtai Agreement early, it shall provide Xian TCH a 60 day notice and pay the termination fee and compensation for the damages to Xian TCH according to the following formula: 1) if it is less than five (5) years into the term when Zhongtai requests termination, Zhongtai shall pay: Xian TCHs total investment amount plus Xian TCHs annual investment return times five (5) years minus the years in which the system has already operated); or 2) if it is more than five (5) years into the term when Zhongtai requests the termination, Zhongtai shall pay: Xian TCHs total investment amount minus total amortization cost (the amortization period is ten (10) years)