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9. Stock Options and Warrants (Tables)
6 Months Ended
Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]  
Stock options outstanding
   Options   Weighted Avg.
Exercise Price
 
January 1, 2016   21,535,148   $0.30 
Granted   2,250,527    0.19 
Exercised        
Forfeited   (61,419)   1.46 
Outstanding, June 30, 2016   23,724,256   $0.28 
Exercisable, June 30, 2016   21,473,729   $0.29 
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
$ 0.21 - $ 0.99     23,573,810     5.2   $0.28     21,323,283     $0.29
$ 1.00 - $ 1.99     150,446     7.1   $1.18     150,446     $1.18
      23,724,256     5.3   $0.28     21,473,729     $0.29
Warrants outstanding
   Warrants   Weighted Avg.  
Exercise Price
 
January 1, 2016   4,411,667   $0.31 
Granted   5,626,225    0.11 
Exercised        
Cancelled   (695,000)   0.49 
June 30, 2016   9,342,892   $0.17 
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
$ 0.25 - $ 0.99    9,342,892   1.8  $0.17    9,342,892    $0.18
$ 1.00 - $ 1.99               
     9,342,892   1.8  $0.17    9,342,892    $0.18