Annual report pursuant to Section 13 and 15(d)

Other long-term assets (Schedule of Other Long-Term Assets) (Details)

v3.7.0.1
Other long-term assets (Schedule of Other Long-Term Assets) (Details) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Goodwill:      
Goodwill, beginning $ 447,951 $ 447,951  
Additions 429,418  
Impairments  
Goodwill, ending 877,369 447,951  
Accumulated amortization (60,712) (60,712) $ (60,712)
Deposits:      
Deposits, beginning  
Additions 37,000    
Deposits, ending 37,000  
Total other long-term assets:      
Cost, beginning 2,132,688 2,292,546  
Additions 492,485  
Impairments  
Cost, ending 1,947,351 2,132,688  
Total accumulated amortization of intangible assets and goodwill (542,895) (609,039) $ (568,356)
Other long-term assets, net, beginning 1,523,649 1,724,190  
Additions 416,063 (12,400)  
Impairments (535,256) (188,141)  
Other long-term assets, net, ending 1,404,456 1,523,649  
Patents [Member]      
Patents:      
Cost, beginning 1,684,737 1,844,595  
Additions 26,067 92,033  
Impairment (677,822) (251,891)  
Cost, ending 1,032,982 1,684,737  
Accumulated amortization, beginning (548,327) (507,644)  
Additions (76,422) (104,433)  
Impairments 142,566 63,750  
Accumulated amortization, ending $ (482,183) $ (548,327)