Quarterly report pursuant to Section 13 or 15(d)

Other long-term assets (Details)

v3.5.0.2
Other long-term assets (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]          
Patents, trademarks and applications, net of accumulated amortization $ 891,317   $ 891,317   $ 1,136,410
Long-term deposits 37,000   37,000  
Goodwill 387,239   387,239   387,239
Total other long-term assets 1,315,556   1,315,556   1,523,649
Finite-lived assets, accumulated amortization 575,092   575,092   $ 548,327
Future amortization          
2016 81,000   81,000    
2017 81,000   81,000    
2018 81,000   81,000    
2019 81,000   81,000    
2020 81,000   81,000    
Impairment charges $ 32,000 $ 200,000 $ 5,000