Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 28, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 72,608	$ 105,451
Marketable securities	206,614	224,090
Accounts receivable, net of allowance for doubtful accounts of $0 at September 28, 2012 and December 31, 2011	46,638	53,126
Inventory	21,253	15,434
Deferred income taxes	751	486
Other current assets	21,605	12,246
Total current assets	369,469	410,833
Property and equipment, net	25,452	22,084
Intangible assets, net	17,106	1,200
Goodwill	34,563	5,062
Investments	24,058	55,427
Deferred income taxes	1,708	1,137
Other assets	14,464	8,972
Total assets	486,820	504,715
Current liabilities:
Accounts payable	14,114	12,754
Accrued expenses	24,313	21,620
Current portion of deferred revenue	32,722	38,565
Current portion of convertible subordinated note	8,120
Current portion of other long-term liabilities	1,469	1,275
Total current liabilities	80,738	74,214
Deferred revenue	9,568	11,601
Long-term portion of convertible subordinated note	2,380
Other long-term liabilities	3,471	3,599
Total liabilities	96,157	89,414
Commitments and contingencies (Note 15)
Stockholders' equity:
Preferred stock, $0.01 par value; 5,000,000 shares authorized, none issued and outstanding
Common stock, $0.001 par value; 600,000,000 shares authorized; 280,524,050 shares issued and outstanding at September 28, 2012 and 279,318,396 shares issued and outstanding at December 31, 2011	281	279
Additional paid-in capital	1,319,113	1,309,919
Accumulated deficit	(935,986)	(902,204)
Accumulated other comprehensive income	7,255	7,307
Total stockholders' equity	390,663	415,301
Total liabilities and stockholders' equity	$ 486,820	$ 504,715