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10. Stock-Based Compensation (Tables)
9 Months Ended
Sep. 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     85       (85 )     3.23  
Balance as of September 30, 2015     117       966     $ 5.88