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Product Warranties (Tables)
3 Months Ended
Mar. 31, 2016
Guarantees [Abstract]  
Product Warranty Activity

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

 

     Three Months Ended  
     March 31,  
     2016      2015  

Balance at the beginning of the period

   $ 584      $ 204  

Accruals for warranties for products sold in the period

     122        15  

Fulfillment of warranty obligations

     (68      (32

Revisions of estimated obligations

     (50      —    
  

 

 

    

 

 

 

Balance at the end of the period

   $ 588      $ 187