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Accrued Liabilities
 12 Months Ended
Dec. 31, 2013
Accrued Liabilities
8. ACCRUED LIABILITIES

Accrued liabilities consist of the following:

 

     As of December 31,  
     2013      2012  

Accrued compensation and benefits

    $ 11,591       $ 9,364   

Accrued warranties

      2,364         2,359   

Professional and legal fees

      1,203         1,472   

Other accrued liabilities

      4,975         5,021   
  

 

 

     

 

 

  
   $ 20,133       $ 18,216   
  

 

 

     

 

 

  

Activity related to accrued warranties was as follows:

 

     Years ended December 31,  
     2013     2012     2011  

Beginning Balance

    $ 2,359      $ 2,365      $ 1,857   

Provision for warranty expense

      3,541        3,071        2,953   

Warranty expired

      (3,536 )      (3,077 )      (2,445 ) 
  

 

 

    

 

 

    

 

 

  

Ending Balance

    $ 2,364      $ 2,359      $ 2,365