Unaudited Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Nov. 02, 2013	Oct. 27, 2012	Nov. 02, 2013	Oct. 27, 2012
Net revenue	$ 54,394	$ 63,905	$ 160,696	$ 172,414
Cost of revenue	23,311	38,423	74,601	95,257
Gross profit	31,083	25,482	86,095	77,157
Operating expenses
Research and development	17,555	26,741	56,528	76,505
Sales and marketing	5,608	12,774	16,817	27,457
General and administrative	5,212	6,007	14,911	21,874
Restructuring costs	1,104	821	1,994	821
Impairment of IP, mask sets and design tools	150		338
Gain on acquisition				(1,417)
Total operating expenses	29,629	46,343	90,588	125,240
Income (loss) from operations	1,454	(20,861)	(4,493)	(48,083)
Gain on sale of development project			1,079
Gain on sale (impairment) of privately-held investments, net	(163)		(163)
Interest and other income (expense), net	(91)	299	721	1,032
Income (loss) before income taxes	1,200	(20,562)	(2,856)	(47,051)
Provision for income taxes	4,178	18,889	9,446	19,520
Net loss	$ (2,978)	$ (39,451)	$ (12,302)	$ (66,571)
Net loss per common share:
Basic (in Dollars per share)	$ (0.09)	$ (1.18)	$ (0.36)	$ (2.02)
Diluted (in Dollars per share)	$ (0.09)	$ (1.18)	$ (0.36)	$ (2.02)
Shares used in computing net loss per share:
Basic (in Shares)	34,518	33,383	34,129	33,032
Diluted (in Shares)	34,518	33,383	34,129	33,032