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Consolidated Statements of Comprehensive Income (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Consolidated Statements of Comprehensive Income      
Net Income (loss) $ 15,671,879 $ 10,833,215 $ (1,222,682)
Other comprehensive income (loss):      
Foreign currency translation adjustments 714,576 (641,538) 882,381
Total other comprehensive income (loss), net of tax $ 16,386,455 $ 10,191,677 $ (340,301)