Unaudited Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	May 04, 2013	Apr. 28, 2012
Cash flows from operating activities
Net loss	$ (4,533)	$ (13,702)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	5,568	5,117
Stock-based compensation	2,033	2,826
Provision for excess and obsolete inventory	561	303
Provision for sales returns, discounts and doubtful accounts	71	149
Deferred income taxes	1,669
(Gain) loss on disposal of software, equipment and leasehold improvements	(3)	34
Gain on sale of development project	(1,079)
Non-cash restructuring costs	81
Accretion of contributed leasehold improvements	(13)	(69)
Impairment of IP, mask sets and design tools	188
Changes in operating assets and liabilities:
Accounts receivable	(4,683)	(2,544)
Inventory	5,341	3,123
Prepaid expenses and other current assets	2,140	(113)
Other non-current assets	(80)	182
Accounts payable	3,117	(1,605)
Accrued compensation and related benefits and other liabilities	(5,265)	392
Income taxes payable and other long-term liabilities	523	(1,019)
Net cash provided by (used in) operating activities	5,636	(6,926)
Cash flows from investing activities
Restricted cash	(2)
Purchases of marketable securities	(2,535)	(10,393)
Sales and maturities of marketable securities	3,390	54,662
Purchases of software, equipment and leasehold improvements	(2,594)	(1,928)
Purchases of IP	(2,750)	(739)
Proceeds from sale of development project, net of transaction fees	1,971
Repayment of note receivable	250
Net cash provided by (used in) investing activities	(2,270)	41,602
Cash flows from financing activities
Net proceeds from exercise of employee stock options and stock purchase rights	32	55
Net cash provided by financing activities	32	55
Effect of foreign exchange rate changes on cash and cash equivalents	(169)	36
Net increase in cash and cash equivalents	3,229	34,767
Cash and cash equivalents, beginning of period	51,218	44,283
Cash and cash equivalents, end of period	54,447	79,050
Supplemental disclosure of cash flow information
Cash paid for income taxes	$ 1,969	$ 468