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8. Stock Options and Warrants (Tables)
6 Months Ended
Jun. 30, 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    (538,197)   0.13 
Forfeited         
June 30, 2019    39,450,603   $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     17,915,553    8.0   $0.10    15,702,013   $0.10 
$0.25 - $0.49     20,913,552    2.8    0.27    20,913,552    0.27 
$0.50 - $0.99     471,052    4.8    0.85    471,052    0.85 
$1.00 - $2.00     150,446    4.1    1.18    150,446    1.18 
     39,450,603    5.2   $0.20    37,237,063   $0.21 
Warrants outstanding
    Warrants   Weighted Avg.
Exercise Price
 
January 1, 2019    21,055,355   $0.09 
Granted    9,099,204    0.08 
Exercised    (3,138,993)   0.07 
Cancelled    (1,302,362)   0.19 
June 30, 2019    25,713,204   $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    23,643,204    0.6   $0.06    23,577,204   $0.06  
$0.25 - $0.49    2,000,000    2.3    0.30    2,000,000    0.30  
$0.50 - $1.00    70,000    4.8    0.80    70,000    0.80  
     25,713,204    0.7   $0.08    25,647,204   $0.08