Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Consolidated Statements of Operations
Net sales	$ 392,873	$ 331,749	$ 516,020
Cost of sales	257,991	228,607	300,887
Gross profit	134,882	103,142	215,133
Operating expenses:
Selling, general and administrative	89,760	85,486	73,110
Research and development	81,171	81,424	95,153
Amortization	13,146	5,527	4,908
Restructuring	4,394	1,485	3,813
Asset impairment	58,170	1,220	1,335
Changes in contingent consideration	(29,368)	829
Other, net	(3,182)	(1,017)	(398)
Total operating expenses, net	214,091	174,954	177,921
Operating income (loss)	(79,209)	(71,812)	37,212
Interest income	1,570	1,200	2,476
Interest expense	(715)	(598)	(1,502)
Income (loss) from continuing operations before income taxes	(78,354)	(71,210)	38,186
Income tax provision (benefit)	(11,414)	(28,947)	11,657
Income (loss) from continuing operations	(66,940)	(42,263)	26,529
Discontinued operations:
Income from discontinued operations before income taxes			6,269
Income tax provision			1,870
Income from discontinued operations			4,399
Net income (loss)	$ (66,940)	$ (42,263)	$ 30,928
Basic income (loss) per common share:
Continuing operations (in dollars per share)	$ (1.70)	$ (1.09)	$ 0.69
Discontinued operations (in dollars per share)			$ 0.11
Net Income (loss) (in dollars per share)	$ (1.70)	$ (1.09)	$ 0.80
Diluted income (loss) per common share:
Continuing operations (in dollars per share)	$ (1.70)	$ (1.09)	$ 0.68
Discontinued operations (in dollars per share)			$ 0.11
Net Income (loss) (in dollars per share)	$ (1.70)	$ (1.09)	$ 0.79
Weighted average number of shares:
Basic (in shares)	39,350	38,807	38,477
Diluted (in shares)	39,350	38,807	39,051