Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012
Revenues	$ 62,733	$ 54,813	$ 115,353	$ 89,619
Cost of revenues	46,328	38,646	89,873	69,296
Gross profit	16,405	16,167	25,480	20,323
Operating expenses:
Research and development	10,915	10,935	21,844	21,782
Selling, general and administrative	13,487	11,531	28,105	22,679
Restructuring charges, net	92	136	4,072	103
Loss on sale of subsidiary	300		300
Impairment of long-lived assets	121	61	179	229
Total operating expenses	24,915	22,663	54,500	44,793
Operating loss	(8,510)	(6,496)	(29,020)	(24,470)
Interest income, net	96	182	203	394
Other income, net	209	546	632	956
Loss before income taxes	(8,205)	(5,768)	(28,185)	(23,120)
Provision for (benefit from) income taxes	202	(1,551)	(5)	(1,449)
Net loss	$ (8,407)	$ (4,217)	$ (28,180)	$ (21,671)
Net loss per share:
Basic and Diluted (In dollars per share)	$ (0.16)	$ (0.08)	$ (0.52)	$ (0.44)
Weighted-average number of shares used in per share calculations:
Basic and Diluted (In shares)	54,105	49,817	53,886	49,652