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4. COMMON STOCK (Tables)
12 Months Ended
Dec. 31, 2018
Equity [Abstract]  
Stock option activity
           Weighted-     
       Weighted-   Average     
       Average   Remaining   Aggregate 
       Exercise   Contractual   Intrinsic 
   Shares   Price   Term (Years)   Value 
Outstanding at December 31, 2017               
Granted   2,750,000   $2.00       $ 
Exercised                
Forfeited/expired   (42,673)   2.40         
Outstanding at December 31, 2018   2,707,327   $2.00    4.56   $5,402,585 
Exercisable at December 31, 2018      $       $ 
Summary of unvested option activity
      Weighted- 
      Average 
      Grant Date 
   Shares   Fair Value 
Unvested at December 31, 2017      $ 
Granted   2,750,000    2.00 
Forfeited/expired   (42,673)   2.40 
Vested        
Unvested at December 31, 2018   2,707,327   $2.00 
Summary of restricted stock activity
      Weighted- 
      Average Grant 
   Shares   Date Fair Value 
Outstanding at December 31, 2016   4,960,000   $0.16 
Granted   1,000,000    0.42 
Vested   (1,320,000)   0.17 
Outstanding at December 31, 2017   4,640,000    0.20 
Granted   3,070,000    1.78 
Forfeited   (275,000)   0.16 
Vested   (1,400,000)   0.18 
Outstanding at December 31, 2018   6,035,000   $0.94