Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Statement [Abstract]
Revenues	$ 237,863	$ 286,096	$ 330,865	[1]
Cost of sales:
Cost of sales	165,166	188,513	225,752	[1]
Amortization of purchased technology	8,559	9,544	8,348	[1]
Total cost of sales	173,725	198,057	234,100	[1]
Gross margin	64,138	88,039	96,765	[1]
Research and development	45,000	47,739	44,625	[1]
Selling, general and administrative	41,210	45,200	52,722	[1]
Intangible assets amortization	5,215	5,215	2,922	[1]
Impairment of goodwill	0	29,748	0	[1]
Restructuring and other charges, net	7,479	(117)	9,980	[1]
Gain on the liquidation of a foreign subsidiary	0	0	(2,081)	[1]
Loss from operations	(34,766)	(39,746)	(11,403)	[1]
Interest expense	(1,220)	(1,722)	(1,870)	[1]
Interest income	26	39	99	[1]
Other income	1,511	545	513	[1]
Loss before income tax expense	(34,449)	(40,884)	(12,661)	[1]
Income tax expense (benefit)	14,955	2,590	(11,132)	[1]
Net loss	$ (49,404)	$ (43,474)	$ (1,529)	[1]
Net loss per share:
Basic	$ (1.72)	$ (1.60)	$ (0.06)	[1]
Diluted	$ (1.72)	$ (1.60)	$ (0.06)	[1]
Weighted average shares outstanding:
Basic	28,805	27,174	25,413	[1]
Diluted	28,805	27,174	25,413	[1]

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