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Profit and Loss Statement of Erdos TCH, prepared under Chinese GAAP (Detail) (Erdos TCH, USD $)
 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Erdos TCH
    
Noncontrolling Interest [Line Items]    
Net Revenue $ 7,510,614 $ 6,387,265
Cost of Revenue (4,215,028) (3,663,910)
Gross Profit 3,295,586 2,724,355
Operating expenses 28,075 10,907
Income from operations 3,267,511 2,713,448
Non-operating income (expense) (2,361,930) 4,477
Income tax expense (226,395) (679,481)
Net Income $ 679,186 $ 2,038,444