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MAJOR CUSTOMERS (Narrative) (Details) | Dec. 31, 2011
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Customer 1 [Member] |
Major Customers [Line Items] |
Sales revenue | 37.00%
Customer 2 [Member] |
Major Customers [Line Items] |
Sales revenue | 35.00%

X
- Details
Name: | creg_MajorCustomersLineItems
Namespace Prefix: | creg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The percentage of net product revenue to total net revenue from the sale of goods as of year end. + References No definition available. + Details
Name: | us-gaap_SalesRevenueGoodsNetPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant