Unaudited Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Aug. 03, 2013	Jul. 28, 2012
Cash flows from operating activities:
Net loss	$ (9,324)	$ (27,120)
Depreciation and amortization	10,272	10,693
Stock-based compensation	3,719	5,576
Provision for excess and obsolete inventory	575	1,700
Provision for sales returns, discounts, and doubtful accounts	62	62
Deferred income taxes	2,913	(204)
Loss on disposal of equipment	20	87
Accretion of contributed leasehold improvements	(26)	(139)
Gain on acquisition		(1,417)
Gain on sale of development project	(1,079)
Impairment of IP, mask sets and design tools	188
Non-cash restructuring charges	830
Changes in operating assets and liabilities:
Accounts receivable	(17,448)	(8,525)
Inventories	4,325	1,572
Prepaid expenses and other current assets	2,378	(3,190)
Other non-current assets	(47)	(2,567)
Accounts payable	13,809	9,113
Accrued compensation and related benefits and other liabilities	1,915	12,974
Income taxes payable	(991)	(856)
Other long-term liabilities	(347)	(957)
Net cash provided by (used in) operating activities	11,744	(3,198)
Cash flows from investing activities:
Restricted cash	(2)	3
Purchases of marketable securities	(7,874)	(14,593)
Sales and maturities of marketable securities	7,641	72,511
Purchases of software, equipment and leasehold improvements	(4,995)	(1,485)
Proceeds from sale of development project, net of transaction fees	1,971
Cash paid in connection with acquisition		(39,740)
Repayment of note receivable	250
Purchases of IP	(4,099)	(1,827)
Net cash provided by (used in) investing activities	(7,108)	14,869
Cash flows from financing activities:
Net proceeds from exercises of employee stock options and stock purchase rights	1,447	2,233
Net cash provided by financing activities	1,447	2,233
Effect of foreign exchange rate changes on cash and cash equivalents	(160)	(116)
Net increase in cash and cash equivalents	5,923	13,788
Cash and cash equivalents at beginning of period	51,218	44,283
Cash and cash equivalents at end of period	57,141	58,071
Supplemental disclosure of cash flow information:
Cash paid for income taxes	$ 3,215	$ 1,282