Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 29, 2016	Oct. 31, 2015	Oct. 29, 2016	Oct. 31, 2015
Net revenue	$ 62,729	$ 61,581	$ 177,820	$ 175,800
Cost of revenue	31,734	30,794	93,242	87,141
Gross profit	30,995	30,787	84,578	88,659
Operating expenses
Research and development	18,264	17,339	56,255	49,754
Sales and marketing	5,984	5,875	17,646	16,940
General and administrative	4,578	5,314	14,536	16,100
Impairment of IP, mask sets and design tools		795	300	1,783
Total operating expenses	28,826	29,323	88,737	84,577
Income (loss) from operations	2,169	1,464	(4,159)	4,082
Gain on sale of development project		7,551		7,551
Interest and other income (expense), net	179	37	(157)	821
Income (loss) before income taxes	2,348	9,052	(4,316)	12,454
Provision for income taxes	2,127	2,617	5,283	6,105
Net income (loss)	$ 221	$ 6,435	$ (9,599)	$ 6,349
Net income (loss) per common share:
Basic (in dollars per share)	$ 0.01	$ 0.18	$ (0.26)	$ 0.18
Diluted (in dollars per share)	$ 0.01	$ 0.17	$ (0.26)	$ 0.17
Shares used in computing net income (loss) per share:
Basic (in shares)	37,666	36,046	37,241	35,670
Diluted (in shares)	38,001	36,785	37,241	36,515