Product Warranty (Tables)

6 Months Ended

Jun. 30, 2015

Product Warranty

Schedule of standard product warranty liability

	Six months ended June 30,
	2015			2014
	(in thousands)
Balance at January 1 (beginning of year)	$	1,526		$	1,428
Warranties issued during the period	2,230			832
Settlements made during the period	(1,020		)	(978		)
Changes in estimate of liability for pre-existing warranties during the period	344			79
Balance at June 30 (end of period)	$	3,080		$	1,361
Amount classified as current	$	2,886		$	1,326
Amount classified as long-term	194			35
Total warranty liability	$	3,080		$	1,361