Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2012	Sep. 30, 2011	Sep. 28, 2012	Sep. 30, 2011
Product revenue	$ 113,769	$ 121,954	$ 337,691	$ 354,977
Service revenue	22,913	16,917	59,346	50,725
Net revenue	136,682	138,871	397,037	405,702
Product cost of revenue	64,927	64,954	193,503	190,188
Service cost of revenue	11,851	9,956	32,390	27,870
Total cost of revenue	76,778	74,910	225,893	218,058
Gross profit	59,904	63,961	171,144	187,644
Operating expenses:
Research and development	26,524	25,638	79,994	77,449
Selling, general and administrative	32,150	32,254	96,603	98,361
Amortization of intangibles	2,179	2,229	6,548	6,688
Total operating expenses	60,853	60,121	183,145	182,498
Income (loss) from operations	(949)	3,840	(12,001)	5,146
Interest income, net	128	90	363	256
Other income (expense), net	(164)	381	119	(25)
Income (loss) before income taxes	(985)	4,311	(11,519)	5,377
Provision for income taxes	7,245	765	4,222	925
Net income (loss)	$ (8,230)	$ 3,546	$ (15,741)	$ 4,452
Net income (loss) per share:
Basic	$ (0.07)	$ 0.03	$ (0.13)	$ 0.04
Diluted	$ (0.07)	$ 0.03	$ (0.13)	$ 0.04
Weighted average shares:
Basic	116,517	115,791	116,946	114,855
Diluted	116,517	116,208	116,946	116,005