Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Consolidated Statements of Operations
Net sales	$ 140,744	$ 93,341	$ 370,494	$ 279,304
Cost of sales	86,494	60,783	232,038	182,296
Gross profit	54,250	32,558	138,456	97,008
Operating expenses, net:
Selling, general, and administrative	21,905	21,712	69,153	65,270
Research and development	19,200	19,968	57,904	60,747
Amortization of intangible assets	5,891	3,149	21,832	8,951
Restructuring	469	2,317	3,509	3,510
Asset impairment		2,864	126	2,864
Changes in contingent consideration				(29,368)
Other, net	207	36	(795)	(334)
Total operating expenses, net	47,672	50,046	151,729	111,640
Operating income (loss)	6,578	(17,488)	(13,273)	(14,632)
Interest income	256	344	787	730
Interest expense	(95)	(39)	(345)	(189)
Income (loss) before income taxes	6,739	(17,183)	(12,831)	(14,091)
Income tax expense (benefit)	1,433	(3,206)	9,360	(4,063)
Net income (loss)	$ 5,306	$ (13,977)	$ (22,191)	$ (10,028)
Income (loss) per common share:
Basic (in dollars per share)	$ 0.13	$ (0.35)	$ (0.56)	$ (0.26)
Diluted (in dollars per share)	$ 0.13	$ (0.35)	$ (0.56)	$ (0.26)
Weighted average number of shares:
Basic (in shares)	40,846	39,401	39,729	39,317
Diluted (in shares)	40,979	39,401	39,729	39,317