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Refundable Deposits from Customers for Systems Leasing | 12 Months Ended
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Dec. 31, 2019
Leases [Abstract] |
REFUNDABLE DEPOSITS FROM CUSTOMERS FOR SYSTEMS LEASING | 11. REFUNDABLE DEPOSITS FROM CUSTOMERS FOR SYSTEMS LEASING As of December 31, 2019 and 2018, the balance of refundable deposits from customers for systems leasing was $544,709 (for Pucheng systems) and $1,034,503 (for Pucheng and Shenqiu systems), respectively.

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- Definition The entire disclosure for refundable deposit from customers for systems leasing. + References No definition available. + Details
Name: | creg_RefundableDepositFromCustomersForSystemsLeasingTextBlock
Namespace Prefix: | creg_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_LeasesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration