Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Revenues	$ 77,584		$ 79,856		$ 153,071		$ 153,483
Cost of sales:
Cost of sales	48,542		54,933		98,547		107,167
Amortization of purchased technology	2,391		1,163		4,833		2,327
Total cost of sales	50,933		56,096		103,380		109,494
Gross margin	26,651		23,760		49,691		43,989
Research and development	11,713		9,600		24,259		18,607
Selling, general and administrative	10,173		10,875		22,173		21,910
Intangible asset amortization	1,304		192		2,608		384
Restructuring and acquisition-related charges, net	1,039		2,481		2,483		2,521
Income (loss) from operations	2,422		612		(1,832)		567
Interest expense	(422)		(456)		(843)		(952)
Other income (expense), net	126		(12)		290		(49)
Income (loss) before income tax expense (benefit)	2,126		144		(2,385)		(434)
Income tax expense (benefit)	819		(46)		1,123		(95)
Net income (loss)	$ 1,307		$ 190		$ (3,508)		$ (339)
Net income (loss) per share:
Basic	$ 0.05		$ 0.01		$ (0.13)		$ (0.01)
Diluted	$ 0.05	[1],[2]	$ 0.01	[1],[2]	$ (0.13)	[1],[2]	$ (0.01)	[1],[2]
Weighted average shares outstanding:
Basic	26,759		24,334		26,708		24,341
Diluted	28,256		24,475		26,708		24,341

[1] For the three and six months ended June 30, 2012 and 2011, 3.5 million and 3.8 million as-if converted shares associated with the Company's 2013 and 2015 convertible senior notes were excluded from the calculation as their effect would have been anti-dilutive

[2] For the six months ended June 30, 2012, the 1.3 million contingently issuable shares were excluded from the calculation as their effect would have been anti-dilutive.