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Stock-Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2016
Disclosure Of Compensation Related Costs, Share-Based Payments [Abstract]  
Schedule of stock-based employee compensation expense included in unaudited consolidated statements of comprehensive income
   

Three Months Ended

September 30,

    

Nine Months Ended

September 30,

  
    2016     2015     2016     2015  
                         
Cost of services   $ 2     $ 9     $ 5     $ 23  
Research and development     29       29       59       56  
Selling and marketing     4       4       7       9  
General and administrative     149       181       303       378  
Stock-based compensation expense   $ 184     $ 223     $ 374     $ 466