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Other Income (Detail) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Other Income Net [Line Items]      
Government subsidies $ 23,879 $ 95,128 $ 99,830
Other   (349)  
Other income $ 23,879 $ 94,779 $ 99,830