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Stockholders' Equity (Tables)
 6 Months Ended
Jun. 27, 2014
Equity [Abstract]  
Components of Accumulated Other Comprehensive Loss
The components of accumulated other comprehensive loss were as follows (in thousands):
 
June 27, 2014
 
December 31, 2013
Foreign currency translation adjustments
$
(12
)
 
$
(242
)
Unrealized gain on investments
13

 
33

Accumulated other comprehensive loss
$
1

 
$
(209
)