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Future Minimum Repayment of Bank Loans (Detail) (USD $)	Jun. 30, 2012
Debt Instrument [Line Items]
Future minimum repayment	$ 30,514,316
2012
Debt Instrument [Line Items]
Future minimum repayment	14,387,580
2013
Debt Instrument [Line Items]
Future minimum repayment	7,747,158
2014
Debt Instrument [Line Items]
Future minimum repayment	6,798,526
2015
Debt Instrument [Line Items]
Future minimum repayment	$ 1,581,052

X

- Definition

Future Minimum Payments Due

+ References

No definition available.

+ Details

Name:	creg_FutureMinimumPaymentsDue
Namespace Prefix:	creg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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- Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration