Product Warranty (Tables)

9 Months Ended

Sep. 30, 2019

Product Warranty

Schedule of product warranty liability

	Nine months ended
	September 30,
	2019		2018
	(in thousands)
Balance at January 1 (beginning of year)	$	5,091	$	4,502
Warranties issued during the period		2,282		4,294
Settlements made during the period		(4,405)		(4,566)
Changes in estimate of liability for pre-existing warranties during the period		523		650
Balance at September 30 (end of period)	$	3,491	$	4,880
Amount classified as current	$	3,251	$	4,545
Amount classified as long-term		240		335
Total warranty liability	$	3,491	$	4,880