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DEFERRED TAX | 12 Months Ended
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Dec. 31, 2011
DEFERRED TAX | 11. DEFERRED TAX Deferred tax asset was a result of the accrued maintenance cost on power generation systems that can be deducted for tax purposes in the future; and difference between tax and accounting basis of cost of fixed assets which was capitalized for tax purposes and expensed as part of cost of systems in the book. Deferred tax liability arose from the difference between tax and accounting basis of net investment in sales-type leases. As of December 31, 2011 and 2010, deferred tax liability consisted of the following:
|  | 2011 |  |  | 2010 |
Deferred tax asset — noncurrent (accrual of system maintenance cost) |  | $ | 33,146 |  |  | $ | 23,161 |
Deferred tax asset — noncurrent (depreciation of fixed assets) |  |  | 25,527,126 |  |  |  | 22,571,649 |
Deferred tax liability — noncurrent (net investment in sales-type leases) |  |  | (31,948,809 | ) |  |  | (29,023,949 | )
Deferred tax liability, net of deferred tax asset – noncurrent |  | $ | 6,388,537 | ) |  | $ | (6,429,139 | )
Deferred tax liability — current (net investment in sales-type leases) |  | $ | (1,624,665 | ) |  | $ | (1,188,504 | )

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- Definition Deferred Tax Assets Liabilities, Net Disclosure [Text Block] + References No definition available. + Details
Name: | creg_DeferredTaxAssetsLiabilitiesNetDisclosureTextBlock
Namespace Prefix: | creg_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration