Product Warranty (Tables)

9 Months Ended

Sep. 30, 2015

Product Warranty

Schedule of standard product warranty liability

	Nine months ended September 30,
	2015			2014
	(in thousands)
Balance at January 1 (beginning of year)	$	1,526		$	1,428
Warranties issued during the period	3,543			1,028
Settlements made during the period	(1,611		)	(1,511		)
Changes in estimate of liability for pre-existing warranties during the period	345			264
Balance at September 30 (end of period)	$	3,803		$	1,209
Amount classified as current	$	3,532		$	1,160
Amount classified as long-term	271			49
Total warranty liability	$	3,803		$	1,209