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Stockholders' Equity (Tables)
 9 Months Ended
Sep. 27, 2013
Equity [Abstract]  
Components of Accumulated Other Comprehensive Loss
The components of accumulated other comprehensive loss were as follows (in thousands):
 
September 27, 2013
 
December 31, 2012
Foreign currency translation adjustments
$
(510
)
 
$
(502
)
Unrealized gain on investments
43

 
37

Accumulated other comprehensive loss
$
(467
)
 
$
(465
)