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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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- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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