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

The following is a rollforward of the product warranty reserve:

 

 

 

Three Months Ended March 31

 

 

 

2018

 

 

2017

 

Beginning of period balance

 

$

1,076

 

 

$

1,058

 

Additions charged to income

 

 

8

 

 

 

27

 

Warranty usage

 

 

(16

)

 

 

(103

)

Currency translation

 

 

4

 

 

 

31

 

End of period balance

 

$

1,072

 

 

$

1,013