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CONSTRUCTION IN PROGRESS (Narrative) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014
Shanxi Datong Coal Group [Member] |
Construction Contracts [Line Items] |
Additional Construction In Progress Gross | $ 2.45 creg_AdditionalConstructionInProgressGross / dei_LegalEntityAxis = creg_ShannxiDatongCoalGroupMember
Xuzhou Huayu project [Member] |
Construction Contracts [Line Items] |
Additional Construction In Progress Gross | 8.17 creg_AdditionalConstructionInProgressGross / dei_LegalEntityAxis = creg_XuzhouHuayuProjectMember
Xuzhou Tian'an project [Member] |
Construction Contracts [Line Items] |
Additional Construction In Progress Gross | 9.81 creg_AdditionalConstructionInProgressGross / dei_LegalEntityAxis = creg_XuzhouTiananProjectMember
Xuzhou Zhongtai project [Member] |
Construction Contracts [Line Items] |
Additional Construction In Progress Gross | 8.28 creg_AdditionalConstructionInProgressGross / dei_LegalEntityAxis = creg_XuzhouZhongtaiProjectMember
Tangshan Rongfeng project [Member] |
Construction Contracts [Line Items] |
Additional Construction In Progress Gross | 2.42 creg_AdditionalConstructionInProgressGross / dei_LegalEntityAxis = creg_TangshanRongfengProjectMember
Chengli Boxing Project [Member] |
Construction Contracts [Line Items] |
Additional Construction In Progress Gross | $ 9.81 creg_AdditionalConstructionInProgressGross / dei_LegalEntityAxis = creg_ChengliBoxingProjectMember

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