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Stock-Based Compensation (Tables)
3 Months Ended
Mar. 31, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Stock-Based Compensation Expense

Stock-based compensation expense for the three months ended March 31 was as follows (in thousands):

 

     Three Months Ended  
     March 31,  
     2014      2013  

Cost of revenues

   $ 36      $ 4  

Selling, general and administrative

     191        183  

Research and development

     7        76  
  

 

 

    

 

 

 

Total stock-based compensation

   $ 234      $ 263