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Income Taxes - US and Foreign Income Before Income Taxes (Details) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Income Tax Disclosure [Abstract]    
United States $ 2,169,451 $ 1,901,905
Foreign 2,827,595 2,124,115
Total $ 4,997,046 $ 4,026,020