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Intangible Assets - Additional Information (Detail) (USD $)
12 Months Ended
Dec. 31, 2013
Goodwill And Intangible Assets Disclosure [Abstract]  
Amortization expense relates to intangible assets $ 1,608,427
Expected amortization expense, 2014 through 2017 relates to intangible assets 3.5
Expected amortization expense 2018, relates to intangible assets 2,100,000
Indefinite-lived intangible assets other than goodwill $ 0