Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 04, 2015	Jun. 28, 2014	Jul. 04, 2015	Jun. 28, 2014
Net loss	$ (6,180)	$ (15,034)	$ (11,205)	$ (26,784)
Other comprehensive loss
Unrealized gain on marketable securities		118		81
Reclassification adjustment:
Effect of net recognized gain on marketable securities reclassified to Interest and other (expense) income, net		(568)		(1,728)
Comprehensive loss	$ (6,180)	$ (15,484)	$ (11,205)	$ (28,431)