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Warranty Reserve (Tables)
 9 Months Ended
Sep. 30, 2014
Accrued Warranty Expense

Accrued warranty expense, which is included in accrued liabilities on the condensed consolidated balance sheets, as of September 30, 2014 and 2013 was as follows (in thousands):

 

     2014     2013  

Accrued warranty balance—January 1,

    $ 737      $ 690   

Warranty costs incurred

      (742 )      (854 ) 

Provision for warranty expense

      689        926   
  

 

 

    

 

 

  

Accrued warranty balance—September 30,

    $ 684      $ 762