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INCOME TAX (Narrative) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Income Taxes [Line Items] |  |
Effective income tax rate | 23.70%us-gaap_EffectiveIncomeTaxRateContinuingOperations | 30.30%us-gaap_EffectiveIncomeTaxRateContinuingOperations
Net operating losses | $ 13.60 us-gaap_DeferredTaxAssetsOperatingLossCarryforwards |
Deferred tax assets, valuation allowance, percentage | 100.00%creg_DeferredTaxAssetsValuationAllowancePercentage |
Operating Income Loss Carryforwards Year | 20 years |
Foreign Retained Earnings Before Application Of Tax | 27.30 creg_ForeignRetainedEarningsBeforeApplicationOfTax | 24.58 creg_ForeignRetainedEarningsBeforeApplicationOfTax
Undistributed Earnings of Foreign Subsidiaries | 104.21 us-gaap_UndistributedEarningsOfForeignSubsidiaries |
Federal income additional taxes | $ 20.10 us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate |
Shanghai TCH [Member] |  |
Income Taxes [Line Items] |  |
Effective income tax rate | 25.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations / creg_IncomeTaxRateAppliedAxis = creg_ShanghaiTchEnergyTechnologyCoLtdMember | 25.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations / creg_IncomeTaxRateAppliedAxis = creg_ShanghaiTchEnergyTechnologyCoLtdMember
Xian TCH [Member] |  |
Income Taxes [Line Items] |  |
Effective income tax rate |  | 15.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations / creg_IncomeTaxRateAppliedAxis = creg_XianTchEnergyTechCoLtdMember
China [Member] |  |
Income Taxes [Line Items] |  |
Effective income tax rate | 25.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations / creg_IncomeTaxRateAppliedAxis = creg_ChinaMember |
Erdos TCH Zhonghong Huahong [Member] |  |
Income Taxes [Line Items] |  |
Effective income tax rate | 25.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations / creg_IncomeTaxRateAppliedAxis = creg_ErdosTchZhonghongHuahongMember | 25.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations / creg_IncomeTaxRateAppliedAxis = creg_ErdosTchZhonghongHuahongMember

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314 + Details
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