Product Warranties (Tables)

12 Months Ended

Dec. 31, 2016

Product Warranties Disclosures [Abstract]

Schedule of activity in the Company's warranty liabilities

A summary of activity in the Company’s warranty liabilities, which are included in accrued expenses in the accompanying consolidated balance sheets, for the years ended December 31, 2016, 2015 and 2014 is presented below (in thousands):

	2016			2015			2014
Balance, beginning of year	$	1,066		$	556		$	253
Additional accruals		727			991			415
Payments		(268	)		(443	)		(112	)
Adjustments and other		—			(38	)		—
Total	$	1,525		$	1,066		$	556