Condensed Consolidated Statements of Cash Flows (USD $) In Thousands	9 Months Ended
	Oct. 02, 2011	Sep. 26, 2010
Cash flows from operating activities:
Net loss	$ (13,776)	$ (25,502)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Allowance for doubtful accounts	72	(731)
Depreciation and amortization	7,099	7,066
Stock-based compensation	1,875	1,989
Other non-cash items	(196)	148
Changes in assets and liabilities:
Accounts receivable	9,407	(3,254)
Advance billings	407	(2,236)
Inventories	(3,287)	(3,067)
Prepaid expenses and other current assets	(310)	(6)
Other assets	247	841
Accounts payable	(4,536)	7,789
Accrued liabilities	4,540	163
Deferred revenue	(239)	3,338
Income taxes payable, non-current and other liabilities	(565)	(411)
Net cash provided by (used in) operating activities	738	(13,873)
Cash flows from investing activities:
Purchases of available-for-sale investments	0	(11,326)
Maturities of available-for-sale investments	2,151	17,775
(Increase) decrease in restricted cash	1,996	(2,018)
Purchases of property and equipment	(785)	(767)
Proceeds from sales of property and equipment	842	0
Net cash from investing activities	4,204	3,664
Cash flows from financing activities:
Proceeds from issuance of common stock, net	12,744	161
Net cash from financing activities	12,744	161
Effect of exchange rate changes on cash and cash equivalents	1,489	(583)
Net increase (decrease) in cash and cash equivalents	19,175	(10,631)
Cash and cash equivalents, beginning of period	16,863	45,346
Cash and cash equivalents, end of period	$ 36,038	$ 34,715