Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Consolidated Statements of Operations
Net sales	$ 85,482	$ 140,744	$ 238,842	$ 370,494
Cost of sales	52,027	86,494	141,991	232,038
Gross profit	33,455	54,250	96,851	138,456
Operating expenses, net:
Research and development	19,892	19,200	63,545	57,904
Selling, general, and administrative	18,396	21,905	58,230	69,153
Amortization of intangible assets	5,261	5,891	15,785	21,832
Restructuring	1,798	469	3,993	3,509
Asset impairment	56,035		69,662	126
Other, net	795	207	884	(795)
Total operating expenses, net	102,177	47,672	212,099	151,729
Operating income (loss)	(68,722)	6,578	(115,248)	(13,273)
Interest income	283	256	879	787
Interest expense	(23)	(95)	(166)	(345)
Income (loss) before income taxes	(68,462)	6,739	(114,535)	(12,831)
Income tax expense	1,136	1,433	2,677	9,360
Net income (loss)	$ (69,598)	$ 5,306	$ (117,212)	$ (22,191)
Income (loss) per common share:
Basic (in dollars per share)	$ (1.78)	$ 0.13	$ (2.99)	$ (0.56)
Diluted (in dollars per share)	$ (1.78)	$ 0.13	$ (2.99)	$ (0.56)
Weighted average number of shares:
Basic (in shares)	39,131	40,846	39,193	39,729
Diluted (in shares)	39,131	40,979	39,193	39,729