Name:	creg_DescriptionOfRemainingLoanBalance
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Number of owned shares.

No definition available.

Name:	creg_OwnedShares
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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

The amount of repayment principal amount.

No definition available.

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The represents value as an repayments of accrued interest.

No definition available.

Name:	creg_RepaymentsOfAccruedInterest
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Total fund capital contribution.

No definition available.

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Amount of realized gain (loss) on investment in debt and equity securities. Excludes other-than-temporary impairment (OTTI).

No definition available.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_DebtConversionLineItems
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Increase for accrued, but unpaid interest on the debt instrument for the period.

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Amount, after allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), investment in debt security measured at amortized cost (held-to-maturity), and investment in debt security measured at fair value with change in fair value recognized in net income (trading), classified as current.

No definition available.

Name:	us-gaap_DebtSecuritiesCurrent
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Amount of accrued but unpaid interest on deposit liabilities.

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current.

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Number of excess stock shares of an entity that have been sold or granted to shareholders.

No definition available.

Name:	us-gaap_ExcessStockSharesIssued
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Data Type:	xbrli:sharesItemType
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The gains (losses) included in earning that represent the difference between the sale price and the carrying value of consumer loans. This element refers to the gain (loss) and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

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Number of shares of investment owned.

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Sum of the carrying amounts as of the balance sheet date of all investments.

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Name:	us-gaap_Investments
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Balance Type:	debit
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The amount of debt and related accrued interest included in liabilities subject to compromise.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Weighted average interest rate of long-term debt outstanding calculated over time.

No definition available.

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Carrying value as of the balance sheet date of loans from a bank with maturities initially due after one year or beyond the operating cycle if longer, excluding current portion.

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-Name Accounting Standards Codification
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Amount of cash outflow for fees classified as other.

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Name:	us-gaap_PaymentsForFees
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Cash payments for and related to principal collection on loans related to operating activities.

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Amount of cash outflow for short-term and long-term debt. Excludes payment of lease obligation.

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Name:	us-gaap_RepaymentsOfDebt
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Name:	us-gaap_DebtInstrumentAxis=creg_FirstPaymentMember
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Data Type:	na
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Name:	us-gaap_DebtInstrumentAxis=creg_SecondPaymentMember
Namespace Prefix:
Data Type:	na
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Name:	us-gaap_DebtInstrumentAxis=creg_ThirdPaymentMember
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Data Type:	na
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Name:	us-gaap_DebtInstrumentAxis=creg_FourthPaymentMember
Namespace Prefix:
Data Type:	na
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Name:	us-gaap_DebtInstrumentAxis=creg_FinalPaymentMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	us-gaap_LongtermDebtTypeAxis=creg_XianTCHMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	us-gaap_PlanNameAxis=creg_TransferPriceForXuzhouHuayuProjectMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	us-gaap_PlanNameAxis=creg_TransferPriceForShenqiuPhaseIAndIIProjectsMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	creg_TypeOfAgreementAxis=creg_TransferAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	us-gaap_LongtermDebtTypeAxis=creg_HYREFMember
Namespace Prefix:
Data Type:	na
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Name:	us-gaap_RelatedPartyTransactionAxis=creg_HuaxinMember
Namespace Prefix:
Data Type:	na
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Name:	srt_TitleOfIndividualAxis=creg_HYREFLoanentrustedLoanMember
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Data Type:	na
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