Product Warranty Reserve (Tables)

6 Months Ended

Jun. 30, 2018

Guarantees [Abstract]

Roll Forward of Product Warranty Reserve

The following is a rollforward of the product warranty reserve:

	Six Months Ended June 30
	2018			2017
Beginning of period balance	$	1,076		$	1,058
Additions charged to income		14			198
Warranty usage		(143	)		(118	)
Currency translation		(68	)		63
End of period balance	$	879		$	1,201