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Condensed Consolidated Statements Of Comprehensive Loss (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012
Condensed Consolidated Statements Of Comprehensive Loss [Abstract]
Net loss	$ (2,863)	$ (3,980)	$ (6,033)	$ (5,061)
Other comprehensive gain (loss):
Net unrealized gain (loss) on investments in marketable securities, net of tax		(6)		1
Total comprehensive loss	$ (2,863)	$ (3,986)	$ (6,033)	$ (5,060)

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The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the economic entity, including both controlling (parent) and noncontrolling interests. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, including any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

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