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Other Payables and Accrued Liabilities (Detail) (USD $)
Jun. 30, 2012
Dec. 31, 2011
Schedule of Accrued Liabilities [Line Items]    
Accrued electricity $ 284,495 $ 314,598
Accrued professional fees 28,000 58,000
Value-added tax payable 971,462  
Accrued interest 338,298 269,019
Accrued expenses 167,765  
Payable for purchase of equipment 478,204 936,908
Others 113,670 11,016
Totals $ 2,381,894 $ 1,589,541