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Intangible Assets, Net - Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands | Dec. 28, 2018 | Dec. 29, 2017
--- | --- | ---
Long-lived intangible assets |  |
Long-lived intangible assets, Gross Carrying Amount | $ 11,579 | $ 11,521
Long-lived intangible assets, Accumulated Amortization | (11,336) | (11,250)
Long-lived intangible assets, Net | 243 | 271
Patents and licenses |  |
Long-lived intangible assets |  |
Long-lived intangible assets, Gross Carrying Amount | 9,257 | 9,244
Long-lived intangible assets, Accumulated Amortization | (9,014) | (8,973)
Long-lived intangible assets, Net | 243 | 271
Customer relationships |  |
Long-lived intangible assets |  |
Long-lived intangible assets, Gross Carrying Amount | 1,420 | 1,392
Long-lived intangible assets, Accumulated Amortization | (1,420) | (1,392)
Long-lived intangible assets, Net | 0 | 0
Developed technology |  |
Long-lived intangible assets |  |
Long-lived intangible assets, Gross Carrying Amount | 902 | 885
Long-lived intangible assets, Accumulated Amortization | (902) | (885)
Long-lived intangible assets, Net | $ 0 | $ 0

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