Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	Apr. 02, 2021	Jan. 01, 2021
Long-lived intangible assets
Long-lived intangible assets, Net	$ 249	$ 270
Patents and licenses
Long-lived intangible assets
Long-lived intangible assets, Gross Carrying Amount	9,339	9,382
Long-lived intangible assets, Accumulated Amortization	(9,090)	(9,112)
Long-lived intangible assets, Net	$ 249	$ 270