Revenue (Tables)

6 Months Ended

Jun. 30, 2017

Revenue [Abstract]

Differentiation of revenue and cost of revenue

Revenue and cost of revenue by source are as follows (in thousands):

	Three months ended June 30,				Six months ended June 30,
	2017		2016		2017		2016
Revenue:
Products	$	83,835	$	62,561	$	162,350	$	124,560
Services	1,342		1,518		2,781		3,330
	$	85,177	$	64,079	$	165,131	$	127,890
Cost of revenue:
Products	$	57,052	$	41,692	$	107,741	$	80,936
Services	1,522		172		2,458		598
Depreciation	512		497		1,099		845
	$	59,086	$	42,361	$	111,298	$	82,379