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Stockholders' Equity (Tables)
 9 Months Ended
Sep. 26, 2014
Equity [Abstract]  
Components of Accumulated Other Comprehensive Loss
The components of accumulated other comprehensive loss were as follows (in thousands):
 
September 26, 2014
 
December 31, 2013
Foreign currency translation adjustments
$
(682
)
 
$
(242
)
Unrealized gain (loss) on investments
(288
)
 
33

Accumulated other comprehensive loss
$
(970
)
 
$
(209
)