Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013
Revenues	$ 67,352	$ 62,733	$ 123,311	$ 115,353
Cost of revenues	47,328	46,328	90,962	89,873
Gross profit	20,024	16,405	32,349	25,480
Operating expenses:
Research and development	11,074	10,915	20,821	21,844
Selling, general and administrative	13,191	13,487	25,445	28,105
Restructuring charges, net	59	92	2,056	4,072
Loss on sale of subsidiary	0	300	0	300
Impairment of long-lived assets	0	121	743	179
Total operating expenses	24,324	24,915	49,065	54,500
Operating loss	(4,300)	(8,510)	(16,716)	(29,020)
Interest income, net	79	96	158	203
Other income (expense), net	(156)	209	(222)	632
Loss before income taxes	(4,377)	(8,205)	(16,780)	(28,185)
Provision (benefit) for income taxes	(51)	202	257	(5)
Net loss	$ (4,326)	$ (8,407)	$ (17,037)	$ (28,180)
Net loss per share:
Basic and Diluted (In dollars per share)	$ (0.08)	$ (0.16)	$ (0.31)	$ (0.52)
Weighted-average number of shares used in per share calculations:
Basic and Diluted (In shares)	55,812	54,105	55,431	53,886