Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 30, 2016	Aug. 01, 2015	Jul. 30, 2016	Aug. 01, 2015
Net revenue	$ 61,316	$ 58,307	$ 115,091	$ 114,219
Cost of revenue	31,734	29,783	61,508	56,347
Gross profit	29,582	28,524	53,583	57,872
Operating expenses
Research and development	18,836	16,102	37,991	32,415
Sales and marketing	5,939	5,254	11,662	11,065
General and administrative	4,820	5,005	9,958	10,786
Impairment of IP, mask sets and design tools	300	955	300	988
Total operating expenses	29,895	27,316	59,911	55,254
(Loss) income from operations	(313)	1,208	(6,328)	2,618
Interest and other income (expense), net	415	113	(336)	784
Income (loss) before income taxes	102	1,321	(6,664)	3,402
Provision for income taxes	1,824	1,025	3,156	3,488
Net (loss) income	$ (1,722)	$ 296	$ (9,820)	$ (86)
Net (loss) income per common share:
Basic (in dollars per share)	$ (0.05)	$ 0.01	$ (0.27)	$ 0
Diluted (in dollars per share)	$ (0.05)	$ 0.01	$ (0.27)	$ 0
Shares used in computing net (loss) income per share:
Basic (in shares)	37,182	35,604	37,028	35,473
Diluted (in shares)	37,182	36,602	37,028	35,473