Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014
Net revenue	$ 58,307	$ 42,810	$ 114,219	$ 79,683
Cost of revenue	29,783	20,921	56,347	37,569
Gross profit	28,524	21,889	57,872	42,114
Operating expenses
Research and development	16,102	16,452	32,415	33,555
Sales and marketing	5,254	5,475	11,065	10,925
General and administrative	5,005	4,555	10,777	9,586
Charges		46	9	1,020
Impairment of IP, mask sets and design tools	955	1,156	988	1,266
Total operating expenses	27,316	27,684	55,254	56,352
Income (loss) from operations	1,208	(5,795)	2,618	(14,238)
Interest and other income, net	113	372	784	320
Income (loss) before income taxes	1,321	(5,423)	3,402	(13,918)
Provision for income taxes	1,025	2,197	3,488	3,616
Net income (loss)	$ 296	$ (7,620)	$ (86)	$ (17,534)
Net income (loss) per common share:
Basic (in dollars per share)	$ 0.01	$ (0.22)	$ 0	$ (0.51)
Diluted (in dollars per share)	$ 0.01	$ (0.22)	$ 0	$ (0.51)
Shares used in computing net income (loss) per share:
Basic (in shares)	35,604	34,622	35,473	34,459
Diluted (in shares)	36,602	34,622	35,473	34,459