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PREPAID EXPENSE AND OTHER CURRENT ASSETS | 12 Months Ended
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Dec. 31, 2012
PREPAID EXPENSE AND OTHER CURRENT ASSETS [Abstract] |
PREPAID EXPENSE AND OTHER CURRENT ASSETS | 5. PREPAID EXPENSE AND OTHER CURRENT ASSETS Prepaid expense and other current assets consist of the following:
|  | December 31, |
|  | 2011 |  |  | 2012 |
Spare parts |  | $ | 3,166,462 |  |  | $ | 3,975,860 |
Prepaid Value added tax ("VAT") |  |  | 5,399,839 |  |  |  | 18,705,984 |
VAT Refundable |  |  | 1,002,186 |  |  |  | - |
Prepaid insurance fee |  |  | 1,121,769 |  |  |  | 471,721 |
Others |  |  | 461,886 |  |  |  | 780,402 |
Total |  | $ | 11,152,142 |  |  | $ | 23,933,967 |

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