Annual report pursuant to Section 13 and 15(d)

8. Stock Options and Warrants (Details-Options by Exercise Price Per Share)

v3.19.1
8. Stock Options and Warrants (Details-Options by Exercise Price Per Share) - Options [Member] - $ / shares
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Outstanding Options      
Options outstanding 35,301,300 35,397,675 23,474,256
Life (Years), options outstanding 5 years 2 months 12 days    
Weighted Average Exercise Price, options outstanding $ 0.22 $ 0.23 $ 0.30
Exercisable Options      
Options exercisable 33,001,300    
Weighted Average Exercise Price, options exercisable $ 0.21    
$0.05 - $0.24 [Member]      
Outstanding Options      
Options outstanding 13,766,250    
Life (Years), options outstanding 8 years 1 month 6 days    
Weighted Average Exercise Price, options outstanding $ 0.10    
Exercisable Options      
Options exercisable 13,466,250    
Weighted Average Exercise Price, options exercisable $ 0.10    
$0.25 - $0.49 [Member]      
Outstanding Options      
Options outstanding 20,913,552    
Life (Years), options outstanding 3 years 3 months 19 days    
Weighted Average Exercise Price, options outstanding $ 0.27    
Exercisable Options      
Options exercisable 18,913,552    
Weighted Average Exercise Price, options exercisable $ 0.27    
$0.50 - $0.99 [Member]      
Outstanding Options      
Options outstanding 471,052    
Life (Years), options outstanding 5 years 3 months 19 days    
Weighted Average Exercise Price, options outstanding $ 0.85    
Exercisable Options      
Options exercisable 471,052    
Weighted Average Exercise Price, options exercisable $ 0.85    
$1.00 - $2.00 [Member]      
Outstanding Options      
Options outstanding 150,446    
Life (Years), options outstanding 4 years 7 months 6 days    
Weighted Average Exercise Price, options outstanding $ 1.18    
Exercisable Options      
Options exercisable 150,446    
Weighted Average Exercise Price, options exercisable $ 1.18