CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013
Revenue:
Product	$ 142,364	$ 120,647	$ 266,606	$ 228,990
Services	23,035	17,738	41,608	34,020
Total revenue	165,399	138,385	308,214	263,010
Cost of revenue:
Cost of product	85,906	80,198	164,344	155,645
Cost of services	9,240	6,533	15,211	13,009
Total cost of revenue	95,146	86,731	179,555	168,654
Gross profit	70,253	51,654	128,659	94,356
Operating expenses:
Research and development	31,738	31,681	61,084	61,407
Sales and marketing	18,082	17,155	35,944	35,201
General and administrative	12,381	11,426	24,635	21,298
Total operating expenses	62,201	60,262	121,663	117,906
Income (loss) from operations	8,052	(8,608)	6,996	(23,550)
Other income (expense), net:
Interest income	337	207	673	404
Interest expense	(2,728)	(849)	(5,405)	(849)
Other gain (loss), net	(264)	(158)	(993)	(361)
Total other income (expense), net	(2,655)	(800)	(5,725)	(806)
Income (loss) before income taxes	5,397	(9,408)	1,271	(24,356)
Provision for income taxes	617	601	865	932
Net income (loss)	$ 4,780	$ (10,009)	$ 406	$ (25,288)
Net income (loss) per common share
Basic (USD per share)	$ 0.04	$ (0.09)	$ 0.00	$ (0.22)
Diluted (USD per share)	$ 0.04	$ (0.09)	$ 0.00	$ (0.22)
Weighted average shares used in computing net income (loss) per common share
Basic weighted average common shares outstanding (in shares)	123,128	116,911	122,240	115,609
Diluted weighted average common shares outstanding (in shares)	126,758	116,911	126,112	115,609