CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 29, 2012	Oct. 01, 2011
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss	$ (53,792)	$ (33,742)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	12,556	13,892
Stock based compensation	4,780	8,296
Amortization of premium on marketable securities	538	204
Marketable securities recovery and accretion	(1,365)	(165)
Gain on disposal of equipment	(47)	(120)
Changes in operating assets and liabilities:
Accounts receivable	3,761	16,610
Inventories	2,209	(247)
Prepaid expenses and other assets	(493)	(821)
Accounts payable	1,879	(3,708)
Accrued liabilities and other liabilities	(2,156)	(2,716)
Net cash used in operating activities	(32,130)	(2,517)
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of plant and equipment	(2,410)	(3,624)
Proceeds from sale of equipment	47	313
Purchases of marketable securities	(32,532)	(49,651)
Proceeds from sales and redemptions of marketable securities	42,762	1,600
Net cash provided (used in) investing activities	7,867	(51,362)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuance of common stock	1,916	323
Net cash provided by financing activities	1,916	323
Net decrease in cash and cash equivalents	(22,347)	(53,556)
Cash and cash equivalents at beginning of period	32,695	97,129
Cash and cash equivalents at end of period	$ 10,348	$ 43,573