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Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2015
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
June 30,		   Six Months Ended
June 30,		  
    2015   2014   2015   2014  
                           
Cost of services   $ 12   $ 14   $ 13   $ 15  
Research and development     26     34     27     37  
Selling and marketing     4     6     5     6  
General and administrative     179     239     197     264  
Stock-based compensation expense   $ 221   $ 293   $ 242   $ 322