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Product Warranties (Tables)
9 Months Ended
Sep. 30, 2015
Guarantees [Abstract]  
Product Warranty Activity

Product warranty activity for the three and nine months ended September 30 was as follows (in thousands):

 

     Three Months Ended
September 30,
     Nine Months Ended
September 30,
 
     2015      2014      2015      2014  

Balance at the beginning of the period

   $  332      $  225      $  204      $  283  

Accruals for warranties for products sold in the period

     280        76        465        159  

Fulfillment of warranty obligations

     (18      (98      (75      (230

Revisions of estimated obligations

     —           (1      —           (10
  

 

 

    

 

 

    

 

 

    

 

 

 

Balance at the end of the period

   $ 594      $ 202      $ 594      $ 202