Segment Information (Details) $ in Thousands	12 Months Ended
	Jan. 01, 2022 USD ($) segment	Jan. 02, 2021 USD ($)	Dec. 28, 2019 USD ($)
Segment Information
Number of operating segments | segment	1
Revenues	$ 720,860	$ 510,928	$ 473,785
Property and equipment, net	146,516	135,803
United States
Segment Information
Revenues	97,471	59,458	63,404
Property and equipment, net	121,990	125,310
China
Segment Information
Revenues	311,513	232,772	203,468
Rest of world
Segment Information
Revenues	311,876	218,698	$ 206,913
Property and equipment, net	$ 24,526	$ 10,493