Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets - Additional Information (Detail)

v2.4.0.8
Intangible Assets - Additional Information (Detail) (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Finite-Lived Intangible Assets [Line Items]        
Amortization expense $ 15,000 $ 36,000 $ 44,176 $ 245,002
License agreements extended period     60 days  
Minimum royalty of agreements     12,500  
Capping total royalties for multiple royalty payments to licensors     3.75%  
Milestone fee upon receiving a Phase II Small Business Innovation Research     15,000  
License agreements [Member]
        
Finite-Lived Intangible Assets [Line Items]        
Future amortization of license and patent agreements in 2013 14,000   14,000  
Future amortization of license and patent agreements in 2014 55,000   55,000  
Future amortization of license and patent agreements in 2015 46,000   46,000  
Future amortization of license and patent agreements in 2016 46,000   46,000  
Future amortization of license and patent agreements in 2017 46,000   46,000  
Future amortization of license and patent agreements in 2018 46,000   46,000  
Patents [Member]
        
Finite-Lived Intangible Assets [Line Items]        
License agreements amortization periods     3 years  
Selling and Marketing Expense [Member]
        
Finite-Lived Intangible Assets [Line Items]        
Royalty fees included in sales and marketing expense $ 64,000 $ 43,000 $ 169,000 $ 125,000
Minimum [Member]
        
Finite-Lived Intangible Assets [Line Items]        
Royalty fees range under the license agreements     1.00%  
Minimum [Member] | License agreements [Member]
        
Finite-Lived Intangible Assets [Line Items]        
License agreements amortization periods     17 years  
Maximum [Member]
        
Finite-Lived Intangible Assets [Line Items]        
Royalty fees range under the license agreements     3.00%  
Maximum [Member] | License agreements [Member]
        
Finite-Lived Intangible Assets [Line Items]        
License agreements amortization periods     20 years