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Income Taxes (Tables)
 3 Months Ended
Mar. 30, 2018
Income Tax Disclosure [Abstract]  
Schedule of income before income tax
The Company reported the following operating results for the periods presented (in thousands):
 
Three months ended
 
March 30,
2018
 
March 31,
2017
Loss before income taxes
$
(12,616
)
 
$
(24,259
)
Provision for (benefit from) income taxes
1,078

 
(232
)
Effective income tax rate
(8.5
)%
 
1.0
%