CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Revenues	$ 231,533	$ 178,535	$ 169,325
Cost of revenues	189,249	153,204	148,367
Gross profit	42,284	25,331	20,958
Operating expenses:
Research and development	42,139	40,130	43,544
Selling, general and administrative	53,217	49,231	46,705
Restructuring charges, net	4,658	2,917	522
Loss on sale of subsidiary	300	0	0
Impairment of long-lived assets	761	421	549
Gain on settlement of litigation	0	(3,250)	0
Total operating expenses	101,075	89,449	91,320
Operating loss	(58,791)	(64,118)	(70,362)
Interest income, net	386	691	1,404
Other income, net	623	1,461	1,076
Loss before income taxes	(57,782)	(61,966)	(67,882)
Benefit from income taxes	(99)	(26,420)	(1,901)
Net loss	$ (57,683)	$ (35,546)	$ (65,981)
Net loss per share:
Basic and diluted (usd per share)	$ (1.06)	$ (0.70)	$ (1.31)
Weighted-average number of shares used in per share calculations:
Basic and diluted (shares)	54,204	50,551	50,521