Condensed Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 25, 2011	Jun. 26, 2010	Jun. 25, 2011	Jun. 26, 2010
Revenue:
Revenue	$ 3,744	$ 4,849	$ 12,917	$ 18,590
Operating expenses:
Costs of services	549	615	1,174	1,285
Research and development expenses	6,456	6,525	11,791	12,435
General and administrative expenses	1,426	1,196	2,768	2,965
Operating income (loss)	(4,687)	(3,487)	(2,816)	1,905
Interest income	50	67	122	91
Interest expense		(45)		(187)
Other income (expense), net	38	59	75	265
Net income (loss)	$ (4,599)	$ (3,406)	$ (2,619)	$ 2,074
Basic income (loss) per share	$ (0.11)	$ (0.08)	$ (0.06)	$ 0.04
Diluted income (loss) per share	$ (0.11)	$ (0.08)	$ (0.06)	$ 0.04
Basic weighted average shares outstanding	42,307	44,377	42,221	46,456
Diluted weighted average shares outstanding	42,307	44,377	42,221	46,691