Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jul. 01, 2011	Jul. 02, 2010	Jul. 01, 2011	Jul. 02, 2010
Condensed Consolidated Statements of Operations [Abstract]
Product revenue	$ 117,156	$ 84,261	$ 233,023	$ 158,695
Service revenue	16,840	11,283	33,808	21,671
Net revenue	133,996	95,544	266,831	180,366
Product cost of revenue	65,315	46,058	130,066	87,069
Service cost of revenue	6,853	3,804	13,082	6,810
Total cost of revenue	72,168	49,862	143,148	93,879
Gross profit	61,828	45,682	123,683	86,487
Operating expenses:
Research and development	25,662	16,977	51,811	33,943
Selling, general and administrative	32,543	24,074	66,107	44,919
Amortization of intangibles	2,230	534	4,459	1,067
Total operating expenses	60,435	41,585	122,377	79,929
Income from operations	1,393	4,097	1,306	6,558
Interest income, net	74	425	166	809
Other expense, net	(299)	(126)	(406)	(497)
Income before income taxes	1,168	4,396	1,066	6,870
Provision for (benefit from) income taxes	778	(49)	160	(2,894)
Net income	$ 390	$ 4,445	$ 906	$ 9,764
Net income per share:
Basic	$ 0.00	$ 0.05	$ 0.01	$ 0.10
Diluted	$ 0.00	$ 0.05	$ 0.01	$ 0.10
Weighted average shares:
Basic	114,939	96,998	114,387	96,845
Diluted	116,298	97,570	116,143	97,529