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Patent Costs Amortized on Straight-Line Basis (Detail) (USD $)
Sep. 30, 2013
Dec. 31, 2012
Expected Amortization Expense [Line Items]    
2013 (remaining three months) $ 27,317  
2014 94,100  
2015 77,656  
2016 61,119  
Thereafter 56,990  
Total $ 317,182 $ 399,131