Income Taxes - Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Current:
Federal	$ 508	$ 1,896	$ 968
State	30	13	80
Foreign	304	7,918	10,634
Current income tax (provision) benefit	842	9,827	11,682
Deferred:
Federal	0	0	18,713
State	0	0	2,318
Foreign	7	90	(173)
Deferred income tax (provision) benefit	7	90	20,858
Income tax expense	$ 849	$ 9,917	$ 32,540