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8. Stock Options and Warrants (Tables)
3 Months Ended
Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]  
Stock options outstanding
    Options   Weighted
Avg. Exercise
Price
 
January 1, 2019    35,301,300   $0.22 
Granted    4,687,500   $0.08 
Exercised    (277,778)  $0.18 
Forfeited         
March 31, 2019    39,711,022   $0.20 
             
Options outstanding by Per Share Price
    Outstanding Options   Exercisable Options
Option
Exercise Price
Per Share
  Shares     Life
(Years)
  Weighted
Average Exercise
Price
  Shares     Weighted
Average Exercise
Price
$0.05 - $0.24     8,175,972     8.3   $0.10     14,360,347     $0.10
$0.25 - $0.49     20,913,552     3.0   $0.27     18,913,552     $0.27
$0.50 - $0.99     471,052     5.1   $0.85     471,052     $0.85
$1.00 - $2.00     150,446     4.3   $1.18     150,446     $1.18
      39,711,022     5.5   $0.20     33,895,397     $0.21
Warrants outstanding
    Warrants   Weighted Avg.
Exercise Price
 
January 1, 2019    21,055,355   $0.09 
Granted    7,350,200    0.05 
Exercised    (1,684,375)   0.07 
Cancelled    (618,750)   0.08 
March 31, 2019    26,102,430   $0.08 
             
Warrants outstanding by Per Share Price
    Outstanding Warrants     Exercisable Warrants  
Warrant Exercise Price Per Share   Shares     Life
(Years)
    Weighted
Average Exercise Price
    Shares     Weighted
Average Exercise Price
 
$0.05 - $0.24     23,390,763       0.8     $ 0.05       23,390,763     $ 0.05  
$0.25 - $0.49     2,641,667       2.0       0.30       2,641,667       0.30  
$0.50 - $1.00     70,000       5.1       0.80       70,000       0.80  
      26,102,430       0.9       0.08       26,102,430       0.08