Financial Statement Components - Components of Accumulated Other Comprehensive Income (Loss) (Details) $ in Thousands	9 Months Ended
	Sep. 26, 2015 USD ($)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period	$ (2,769)
Current period change	(1,938)
End of period	(4,707)
Foreign Currency Translations [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period	(2,604)
Current period change	(1,980)
End of period	(4,584)
Defined Benefit Pension Plans [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period	(134)
Current period change	0
End of period	(134)
Unrealized Income (Loss) on Investment [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period	(31)
Current period change	42
End of period	$ 11