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Refundable Deposit from Customers for Systems Leasing (Details) - USD ($)	Jun. 30, 2017	Dec. 31, 2016
Pucheng, Shenqiu and Yida systems [Member]
Refundable Deposit from Customers for Systems Leasing [Textual]
TCH paid principal and interest	$ 1,048,063	$ 1,023,497

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- References

No definition available.

+ Details

Name:	creg_RefundDepositFromCustomersForSystemsLeasingAbstract
Namespace Prefix:	creg_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

The amount of an asset, typically cash, provided to a counterparty to provide certain assurance of performance by the entity pursuant to the terms of a written or oral agreement, such as a lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.8,17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_SecurityDeposit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- Details

Name:	us-gaap_SaleLeasebackTransactionDescriptionAxis=creg_PuchengShenqiuAndYidaSystemsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: