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Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands | Jul. 02, 2021 | Jan. 01, 2021
--- | --- | ---
Long-lived intangible assets |  |
Long-lived intangible assets, Net | $ 239 | $ 270
Patents and licenses |  |
Long-lived intangible assets |  |
Long-lived intangible assets, Gross Carrying Amount | 9,334 | 9,382
Long-lived intangible assets, Accumulated Amortization | (9,095) | (9,112)
Long-lived intangible assets, Net | $ 239 | $ 270

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