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Income Taxes - Domestic and Foreign Components of Loss before Income Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Jan. 02, 2016
Results of Operations, Income before Income Taxes [Abstract]      
Domestic $ (17,341) $ (33,962) $ (93,229)
Foreign (52,372) (10,220) (33,464)
Loss before income taxes $ (69,713) $ (44,182) $ (126,693)