Quarterly report pursuant to Section 13 or 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
3 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Outstanding Options    
Options outstanding 39,711,022 35,301,300
Weighted Average Exercise Price, options outstanding $ 0.20 $ 0.22
Exercisable Options    
Options exercisable 33,895,397  
Weighted Average Exercise Price, options exercisable $ 0.21  
$0.05 - $0.24 [Member]    
Outstanding Options    
Options outstanding 8,175,972  
Life (Years), options outstanding 8 years 3 months 19 days  
Weighted Average Exercise Price, options outstanding $ 0.10  
Exercisable Options    
Options exercisable 14,360,347  
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  
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 1 month 6 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 3 months 19 days  
Weighted Average Exercise Price, options outstanding $ 1.18  
Exercisable Options    
Options exercisable 150,446  
Weighted Average Exercise Price, options exercisable $ 1.18