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5. Stock-Based Compensation (Tables)
 3 Months Ended
Mar. 31, 2017
Third Eye Capital Revenue Participation Term Notes  
Schedule of options granted under employee stock plans
   

Shares Available

for Grant

     Number of Shares Outstanding    

Weighted-Average

Exercise Price

  
Balance as of December 31, 2016     98       1,632     $ 4.37  
Authorized     655       -       -  
Granted     (637 )     637       1.72  
Forfeited/expired     9       (9 )     4.86  
Balance as of March 31, 2017     125       2,260     $ 3.62  
Schedule of weighted average fair value calculations for options
Description  

 

For the three months ended March 31, 2017

  
Dividend-yield     0 %
Risk-free interest rate     2.28 %
Expected volatility     74.83 %
Expected life (years)     7  
Market value per share on grant date   $ 1.72  
Fair value per share on grant date   $ 1.21