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10. Stock-Based Compensation (Tables)
6 Months Ended
Jun. 30, 2015
Stock-based Compensation Tables  
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, 2014     5       1,015     $ 5.51  
Authorized     200              
Granted     (173 )     173       4.28  
Exercised     -       (137 )     3.79  
Forfeited/expired     50       (50 )     2.04  
Balance as of June 30, 2015     82       1,001     $ 5.84  
Schedule of weighted average fair value calculations for options
Description  

Three months ended

June 30, 2015

 
Dividend-yield     0 %
Risk-free interest rate     1.53 %
Expected volatility     69.34 %
Expected life (years)     5  
Market value per share on grant date   $ 4.35  
Fair value per share on grant date   $ 2.52