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Income Taxes - Domestic and Foreign Components of Loss before Income Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 29, 2018
Dec. 30, 2017
Dec. 31, 2016
Results of Operations, Income before Income Taxes [Abstract]      
Domestic $ (8,274) $ (17,341) $ (33,962)
Foreign (15,695) (52,372) (10,220)
Loss before income taxes $ (23,969) $ (69,713) $ (44,182)