Product Warranty (Tables)

9 Months Ended

Sep. 30, 2021

Product Warranty

Schedule of product warranty liability

	Nine months ended
	September 30,
	2021		2020
	(in thousands)
Balance at January 1 (beginning of year)	$	4,612	$	3,244
Warranties issued during the period		5,277		3,780
Settlements made during the period		(3,099)		(3,131)
Changes in estimate of liability for pre-existing warranties during the period		(452)		584
Balance at September 30 (end of period)	$	6,338	$	4,477
Amount classified as current	$	5,741	$	4,151
Amount classified as long-term		597		326
Total warranty liability	$	6,338	$	4,477