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10. Stock Based Compensation (Tables)
3 Months Ended
Mar. 31, 2014
Stock Based Compensation Tables  
Schedule of options granted under employee stock plans

The following is a summary of options granted under the employee stock plans:

 

   

Shares Available

for Grant

    Number of Shares Oustanding     Weighted-Average Balance Price  
 Balance of December 31, 2013     74       913     $ 4.90  
Authorized     100       -       -  
 Granted     (148 )     148     $ 4.20  
 Exercised     -       (15 )     1.60  
 Forfeited/expired     2       (2 )     5.50  
 Balance of March 31, 2014     28       1,044     $ 4.89  

 

Schedule of weighted average fair value calculations for options

The weighted-average fair value calculations for consultant and employee options are based on the following weighted average assumptions:

 

    As of March 31,  
    2014     2013  
Dividend-yield     0 %     0 %
Risk-free interest rate     0. 44 - 0.74 %     0.23 - 0.57
Expected volatility     70.16 - 79.93 %     58.88 - 81.24 %
Expected life (years)     0.8 - 3.0       0.5 - 4.0  
Market price of the common stock   4.20 - 5.80     $ 6.10