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Product Warranties (Tables)
3 Months Ended
Mar. 31, 2015
Guarantees [Abstract]  
Product Warranty Activity

Product warranty activity for the three months ended March 31, was as follows (in thousands):

 

     2015      2014  

Balance at the beginning of the period

   $  204      $  283  

Accruals for warranties for products sold in the period

     15        24  

Fulfillment of warranty obligations

     (32      (55

Revisions of estimated obligations

     —          (3
  

 

 

    

 

 

 

Balance at the end of the period

$ 187   $ 249