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Estimated Annual Amortization Expense (Detail) (USD $)
Dec. 31, 2013
Dec. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract]    
2014 $ 3,063,146  
2015 2,906,222  
2016 2,906,222  
2017 2,861,481  
2018 2,776,667  
Thereafter 11,684,167  
Intangible assets subject to amortization, net carrying amount $ 26,197,905 $ 14,491,982