CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2012	Sep. 24, 2011	Sep. 29, 2012	Sep. 24, 2011
Revenue:
Product	$ 98,853	$ 89,554	$ 269,087	$ 256,443
Ratable product and related support and services	450	847	1,504	2,583
Services	12,911	13,621	39,782	33,842
Total revenue	112,214	104,022	310,373	292,868
Cost of revenue:
Cost of product	66,510	57,449	181,851	158,607
Cost of ratable product and related support and services	102	167	459	846
Cost of services	4,102	5,757	13,762	12,608
Total cost of revenue	70,714	63,373	196,072	172,061
Gross profit	41,500	40,649	114,301	120,807
Operating expenses:
Research and development	27,912	31,694	90,573	95,902
Sales and marketing	19,285	17,545	55,304	46,437
General and administrative	12,508	13,112	35,912	40,256
Total operating expenses	59,705	62,351	181,789	182,595
Loss from operations	(18,205)	(21,702)	(67,488)	(61,788)
Other income (expense), net:
Interest income	175	205	678	742
Other gain (loss), net	(617)	188	(892)	(203)
Total other income (expense), net	(442)	393	(214)	539
Loss before income taxes	(18,647)	(21,309)	(67,702)	(61,249)
Provision for income taxes	434	497	1,540	1,145
Net loss	$ (19,081)	$ (21,806)	$ (69,242)	$ (62,394)
Net loss per common share
Basic	$ (0.17)	$ (0.21)	$ (0.63)	$ (0.59)
Diluted	$ (0.17)	$ (0.21)	$ (0.63)	$ (0.59)
Weighted average shares used in computing net loss per common share
Basic	111,579	106,264	110,216	104,936
Diluted	111,579	106,264	110,216	104,936