Product Warranty (Tables)

6 Months Ended

Jun. 30, 2021

Product Warranty

Schedule of product warranty liability

	Six months ended
	June 30,
	2021		2020
	(in thousands)
Balance at January 1 (beginning of year)	$	4,612	$	3,244
Warranties issued during the period		3,013		2,635
Settlements made during the period		(1,991)		(1,913)
Changes in estimate of liability for pre-existing warranties during the period		(372)		177
Balance at June 30 (end of period)	$	5,262	$	4,143
Amount classified as current	$	4,690	$	3,942
Amount classified as long-term		572		201
Total warranty liability	$	5,262	$	4,143