CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Net revenues:
Products	$ 75,592	$ 76,150	$ 160,101	$ 156,179
Services	58,477	33,617	117,515	73,174
Total net revenues	134,069	109,767	277,616	229,353
Cost of revenues:
Products	28,488	28,363	55,612	60,160
Services	15,831	14,943	30,241	30,638
Amortization of intangible assets	1,950	163	3,900	163
Total cost of revenues	46,269	43,469	89,753	90,961
Gross profit	87,800	66,298	187,863	138,392
Operating expenses:
Research and development	21,434	23,310	42,838	46,483
Marketing and selling	30,177	32,811	61,796	60,856
General and administrative	16,807	17,425	34,537	36,812
Amortization of intangible assets	782	408	1,568	782
Restructuring (recoveries) costs, net	(213)	539	2,564	539
Total operating expenses	68,987	74,493	143,303	145,472
Operating income (loss)	18,813	(8,195)	44,560	(7,080)
Interest expense	(4,769)	(915)	(9,000)	(1,253)
Other income (expense), net	(390)	(524)	(342)	(909)
Income (loss) before income taxes	13,654	(9,634)	35,218	(9,242)
Provision for (benefit from) income taxes	703	(5,550)	1,338	(4,989)
Net income (loss)	$ 12,951	$ (4,084)	$ 33,880	$ (4,253)
Net income (loss) per common share – basic	$ 0.33	$ (0.10)	$ 0.86	$ (0.11)
Net income (loss) per common share – diluted	$ 0.33	$ (0.10)	$ 0.85	$ (0.11)
Weighted-average common shares outstanding – basic	39,678	39,635	39,622	39,512
Weighted-average common shares outstanding – diluted	39,734	39,635	39,691	39,512