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9. Outstanding Warrants (Tables)
 12 Months Ended
Dec. 31, 2018
Stockholders' deficit:  
Weighted average assumptions
Description   For the year ended December 31  
    2018     2017  
Dividend-yield     0 %     0 %
Risk-free interest rate     2.25 %     1.32 %
Expected volatility     92.2 %     68.5 %
Expected life (years)     2       2  
Market value per share on grant date   $ 1.05     $ 1.43  
Exercise price per share   $ 0.01     $ 0.01  
Fair value per share on grant date   $ 1.04     $ 1.42  
Schedule of warrant activity
     Warrants Outstanding & Exercisable     Weighted - Average Exercise Price     Average Remaining Term in Years  
 Outstanding December 31, 2016     344     $ 3.33       3.88  
 Granted     227       0.01          
 Exercised     (241 )     0.01          
 Expired     -       -          
 Outstanding December 31, 2017     330     $ 3.47       3.02  
 Granted     227       0.01          
 Exercised     (227 )     0.01          
 Expired     (235 )     3.82          
 Outstanding December 31, 2018     95     $ 2.59       6.95