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Goodwill and Other Intangible Assets - Changes in Goodwill (Detail) (USD $)
3 Months Ended
Mar. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]  
Balance as of December 31, 2013 $ 2,139,294
Foreign currency translation 8,132
Balance as of March 31, 2014 $ 2,147,426