Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2014	Mar. 31, 2013
Condensed Consolidated Statements of Operations
Net sales	$ 90,841	$ 61,781
Cost of sales	57,064	39,229
Gross profit	33,777	22,552
Operating expenses:
Selling, general and administrative	21,667	19,648
Research and development	19,768	20,737
Amortization	2,903	856
Restructuring	392	531
Total operating expenses	44,730	41,772
Other operating, net	(212)	404
Changes in contingent consideration	(29,368)
Operating income (loss)	18,627	(19,624)
Interest income (expense), net	164	192
Income (loss) before income taxes	18,791	(19,432)
Income tax provision (benefit)	(369)	(9,361)
Net income (loss)	$ 19,160	$ (10,071)
Basic:
Income (loss) (in dollars per share)	$ 0.49	$ (0.26)
Diluted :
Income (loss) (in dollars per share)	$ 0.48	$ (0.26)
Weighted average shares outstanding:
Basic (in shares)	39,177	38,716
Diluted (in shares)	39,937	38,716

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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