Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 25, 2011	Jun. 30, 2012	Jun. 25, 2011
Revenue:
Revenue	$ 631	$ 3,744	$ 1,263	$ 12,917
Operating expenses:
Cost of services		549		1,174
Research and development expenses	1,330	6,456	2,848	11,791
General and administrative expenses	2,176	1,426	3,453	2,768
Total operating costs	3,506	8,431	6,301	15,733
Operating loss	(2,875)	(4,687)	(5,038)	(2,816)
Interest income	33	50	65	122
Other income (expense), net	109	38	142	75
Loss from continuing operations before income taxes	(2,733)	(4,599)	(4,831)	(2,619)
Benefit from income taxes			671
Loss from continuing operations	(2,733)	(4,599)	(4,160)	(2,619)
Income from discontinued operations, net of tax provision			991
Net loss	$ (2,733)	$ (4,599)	$ (3,169)	$ (2,619)
Basic income (loss) per share:
Continuing operations	$ (0.06)	$ (0.11)	$ (0.10)	$ (0.06)
Discontinued operations			$ 0.02
Diluted income (loss) per share:
Continuing operations	$ (0.06)	$ (0.11)	$ (0.10)	$ (0.06)
Discontinued operations			$ 0.02
Basic weighted-average shares outstanding	42,664	42,307	42,578	42,221
Diluted weighted-average shares outstanding	42,664	42,307	42,578	42,221