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Intangible Assets (Patent Costs Amortized on Straight-Line Basis) (Detail) (USD $)
Dec. 31, 2014
Expected Amortization Expense [Line Items]  
2015 $ 77,656us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
2016 61,119us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
2017 42,229us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
2018 14,761us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
Finite-Lived Intangible Assets, Net, Total $ 195,765us-gaap_FiniteLivedIntangibleAssetsNet