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Consolidated Statements of Comprehensive Income (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
NET INCOME $ 5,596,070 $ 4,752,601 $ 4,160,257
Foreign currency translation adjustments (3,703) (113,550) 161,975
COMPREHENSIVE INCOME $ 5,592,367 $ 4,639,051 $ 4,322,232