Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 30, 2012	Sep. 28, 2013	Sep. 30, 2012
Revenue:
Product	$ 29,146	$ 18,700	$ 70,019	$ 45,806
Services	9,840	6,994	27,189	19,057
Total revenue	38,986	25,694	97,208	64,863
Cost of revenue:
Product	6,744	4,524	18,566	11,975
Services	993	557	3,557	1,502
Total cost of revenue	7,737	5,081	22,123	13,477
Gross profit	31,249	20,613	75,085	51,386
Operating expenses:
Research and development	8,958	4,809	31,726	12,324
Sales and marketing	15,485	9,963	54,020	27,298
General and administrative	4,696	3,720	20,893	7,761
Total operating expenses	29,139	18,492	106,639	47,383
Income (loss) from operations	2,110	2,121	(31,554)	4,003
Interest income	32	55	35	61
Other expense, net	(52)	(17)	(77)	(50)
Income (loss) before income tax (provision) benefit	2,090	2,159	(31,596)	4,014
Income tax (provision) benefit	(704)	(37)	23,838	(128)
Net income (loss)	1,386	2,122	(7,758)	3,886
Accretion of preferred stock to redemption value and issuance costs		(564)	(1,088)	(1,661)
(Earnings) loss distributable to preferred stockholders		(497)	1,107	(710)
Net income (loss) attributable to common stockholders	$ 1,386	$ 1,061	$ (7,739)	$ 1,515
Net income (loss) per share attributable to common stockholders:
Basic and Diluted	$ 0.04	$ 0.06	$ (0.34)	$ 0.09
Weighted average shares used in computing net income (loss) per share attributable to common stockholders:
Basic	30,933	17,300	22,529	17,300
Diluted	32,554	17,307	22,529	17,300