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Goodwill and Other Intangible Assets - Changes in Goodwill (Detail) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Acquired Finite-Lived Intangible Assets [Line Items]    
Balance as of December 31, 2012 $ 1,983,426  
Net deferred tax liability 293,000 364,000
Foreign currency translation 38,053  
Balance as of December 31, 2013 2,139,294  
In-process research and development [Member]
    
Acquired Finite-Lived Intangible Assets [Line Items]    
Net deferred tax liability $ 117,815