Product Warranties (Tables)

12 Months Ended

Dec. 31, 2015

Product Warranties

Schedule of change in warranty reserve

	December 31
	2015			2014
Balance as of January 1	$	1,449		$	2,196
Payments and replacement product	(677		)	(1,210		)
Additions to warranty reserve for warranties issued during the period	485			647
Change in the warranty reserve for pre-existing warranties	(5		)	(184		)
Balance as of December 31	$	1,252		$	1,449