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Stock-Based Awards (Tables)
3 Months Ended
Mar. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Stock-Based Compensation Expense

The Company recognized stock-based compensation expense on all awards in the following expense categories:

 

     Three months ended
March 31,
 
     2013      2012  

Cost of revenue

   $ 399       $ 379   

Research and development

     831         972   

Sales and marketing

     984         675   

General and administrative

     1,327         1,273   
  

 

 

    

 

 

 
   $ 3,541       $ 3,299