XML 40 R29.htm IDEA: XBRL DOCUMENT v3.8.0.1
Product Warranties (Tables)
3 Months Ended
Mar. 31, 2018
Guarantees and Product Warranties [Abstract]  
Product Warranty Activity

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

 

     2018      2017  

Balance at the beginning of the period

   $ 290    $ 214

Accruals for warranties for products sold in the period

     123      104

Fulfillment of warranty obligations

     (57      (73

Revisions of estimated obligations

     (10      (60
  

 

 

    

 

 

 

Balance at the end of the period

   $ 346    $ 185