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Product Warranty Reserve (Tables)
 12 Months Ended
Dec. 31, 2018
Guarantees [Abstract]  
Roll Forward of Product Warranty Reserve

The following is a rollforward of the product warranty reserve:

 

 

 

2018

 

 

2017

 

 

2016

 

Balance at January 1

 

$

1,076

 

 

$

1,058

 

 

$

714

 

Additions charged to costs and expenses

 

 

97

 

 

 

347

 

 

 

649

 

Warranty usage

 

 

(133

)

 

 

(399

)

 

 

(269

)

Currency translation

 

 

(112

)

 

 

70

 

 

 

(36

)

Balance at December 31

 

$

928

 

 

$

1,076

 

 

$

1,058