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6. STOCKHOLDERS' EQUITY (Tables)
6 Months Ended
Jun. 30, 2018
Equity [Abstract]  
Option activity
  

Number

Outstanding

  

Weighted-Average

Exercise Price

Per Share

  

Weighted-Average

Remaining

Contractual Life

(Years)

  

Aggregate

Intrinsic

Value

 
                 
Outstanding at January 1, 2017   1,650,000   $0.04    4.53   $ 
Granted                
Exercised                
Canceled/forfeited/expired                
Outstanding at December 31, 2017   1,650,000    0.04    3.52     
                     
Granted                
Exercised                
Canceled/forfeited/expired                
Outstanding at June 30, 2018   1,650,000    0.04    2.03   $21,000 
Options vested and exercisable at June 30, 2018   1,650,000   $0.04    2.03   $21,000 
Warrant activity
  

Number

Outstanding

  

Weighted-Average

Exercise Price

Per Share

  

Weighted-Average

Remaining

Contractual Life

(Years)

  

Aggregate

Intrinsic

Value

 
                 
Outstanding at January 1, 2017   227,271,136   $0.089    1.44   $ 
Granted   78,395,012    0.080    0.76     
Exercised                
Canceled/forfeited/expired   (158,166,661)   0.085         
Warrants vested and exercisable at December 31, 2017   147,499,487    0.089    1.50     
                     
Granted   35,184,000    0.070    0.82     
Exercised                
Canceled/forfeited/expired   (30,648,331)   0.101         
Outstanding at June 30, 2018   152,035,156    0.082    1.19     
Warrants vested and exercisable at June 30, 2018   152,035,156   $0.082    1.19   $