Intangible Assets, Net - Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	Jan. 01, 2021	Jan. 03, 2020
Long-lived intangible assets
Long-lived intangible assets, Net	$ 270	$ 296
Patents and licenses
Long-lived intangible assets
Long-lived intangible assets, Gross Carrying Amount	9,382	9,353
Long-lived intangible assets, Accumulated Amortization	(9,112)	(9,057)
Long-lived intangible assets, Net	$ 270	$ 296