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

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

 

     Three Months Ended
June 30,
     Six Months Ended
June 30,
 
     2015      2014      2015      2014  

Balance at the beginning of the period

   $ 187       $ 249       $ 204       $ 283   

Accruals for warranties for products sold in the period

     170         60         185         84   

Fulfillment of warranty obligations

     (25      (77      (57      (132

Revisions of estimated obligations

     —           (7      —           (10
  

 

 

    

 

 

    

 

 

    

 

 

 

Balance at the end of the period

   $ 332       $ 225       $ 332       $ 225