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Amortization Expense for Next Five Years Related to Intangible Assets (Detail) (USD $)
Dec. 31, 2014
Finite Lived Intangible Assets Future Amortization Expense [Abstract]  
2015 $ 2,055,474us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
2016 2,055,474us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
2017 1,994,629us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
2018 1,226,387us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
2019 985,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
Thereafter $ 763,431us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive