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7. Discontinued Operations (Tables)
12 Months Ended
Dec. 31, 2012
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]
    For the years ended December 31,  
    2012     2011     2010  
    US$     US$     US$  
Sales from external customers           34,960,409       1,261,472  
Intersegment sales           9,938,301       27,151,876  
Income (loss) from operations           2,613,122       (6,499,869 )
Loss on sale of subsidiaries           (8,318,350 )      
Net loss from discontinued operations           (5,705,228 )     (6,499,869 )