Product Warranty Reserve (Tables)

12 Months Ended

Dec. 31, 2021

Guarantees [Abstract]

Roll Forward of Product Warranty Reserve

The following is a rollforward of the product warranty reserve:

	2021			2020			2019
Balance at January 1	$	1,282		$	1,309		$	928
Additions charged to costs and expenses		934			279			481
Warranty usage		(553	)		(314	)		(317	)
Currency translation		(28	)		8			217
Balance at December 31	$	1,635		$	1,282		$	1,309