Condensed Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Net revenues:
Systems and components	$ 15,991	$ 11,665	$ 38,111	$ 55,067
Technology development	3,124	5,169	10,970	10,874
Total net revenues	19,115	16,834	49,081	65,941
Cost of net revenues:
Systems and components	9,725	7,476	26,206	31,561
Technology development	2,495	3,626	8,638	7,569
Total cost of net revenues	12,220	11,102	34,844	39,130
Gross profit	6,895	5,732	14,237	26,811
Operating expenses:
Research and development	4,250	7,336	16,192	24,812
Selling, general and administrative	5,627	6,389	16,834	19,831
Bad debt expense		3,017		3,017
Total operating expenses	9,877	16,742	33,026	47,660
Gain (loss) on divestitures			(208)	2,207
Loss from operations	(2,982)	(11,010)	(18,997)	(18,642)
Interest income and other, net	220	(8)	392	411
Loss before income taxes	(2,762)	(11,018)	(18,605)	(18,231)
Benefit from income taxes	(17)	(3,011)	(1,184)	(5,570)
Net loss	$ (2,745)	$ (8,007)	$ (17,421)	$ (12,661)
Net loss per share:
Basic and diluted	$ (0.11)	$ (0.34)	$ (0.73)	$ (0.54)
Weighted average common shares outstanding:
Basic and diluted	23,931	23,397	23,793	23,293