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8. Outstanding Warrants (Tables)
 12 Months Ended
Dec. 31, 2015
Outstanding Warrants Tables  
Weighted average assumptions

Description   For the years ended December 31  
    2015     2014  
Dividend-yield     0 %     0 %
Risk-free interest rate     1.10 %     0.49 %
Expected volatility   80.02 %     72.26 %
Expected life (years)     3.62       2  
Market value per share on grant date   $ 4.06     $ 8.78  
Fair value per share on grant date   $ 3.85     $ 8.77  
Schedule of warrant activity
    Warrants Outstanding     Weighted - Average Exercise Price     Average Remaining Term in Years  
 Outstanding December 31, 2013     470     $ 3.40       4.85  
 Granted     148       0.01          
 Exercised     (217 )     1.32          
 Expired     (50 )     4.97          
 Outstanding December 31, 2014     351     $ 3.05       2.69  
 Granted     339       0.85          
 Exercised     (272 )     0.21          
 Expired     (50 )     1.30          
 Outstanding December 31, 2015     368     $ 3.36       4.61