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Product Warranty Reserve (Tables)
12 Months Ended
Dec. 31, 2020
Guarantees [Abstract]  
Roll Forward of Product Warranty Reserve

The following is a rollforward of the product warranty reserve:

 

 

 

2020

 

 

2019

 

 

2018

 

Balance at January 1

 

$

1,309

 

 

$

928

 

 

$

1,076

 

Additions charged to costs and expenses

 

 

279

 

 

 

481

 

 

 

97

 

Warranty usage

 

 

(314

)

 

 

(317

)

 

 

(133

)

Currency translation

 

 

8

 

 

 

217

 

 

 

(112

)

Balance at December 31

 

$

1,282

 

 

$

1,309

 

 

$

928