XML 39 R28.htm IDEA: XBRL DOCUMENT v3.19.2
Product Warranties (Tables)
 6 Months Ended
Jun. 30, 2019
Guarantees and Product Warranties [Abstract]  
Product Warranty Activity
Product warranty activity was as follows (in thousands):
  
Three Months Ended
June 30,
    
Six Months Ended
June 30,
  
  
2019
    
2018
    
2019
    
2018
  
Balance at the beginning of the period
   $
231
     $
346
     $
268
     $
290
  
Accruals for warranties for products sold in the period
    
56
      
10
      
85
      
133
  
Fulfillment of warranty obligations
    
(17
 )    
(20
 )    
(83
 )    
(77
 )
Revisions of estimated obligations
    
—  
      
(10
 )    
—  
      
(20
 )
                                 
Balance at the end of the period
   $
270
     $
326
     $
270
     $
326