INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	9 Months Ended
Sep. 29, 2018	Dec. 30, 2017
Intangible assets
Intangible assets, gross	$ 24,413	$ 24,413
Less: accumulated amortization	(10,928)	(10,367)
Intangible assets, net	13,485	14,046
Intangibles not subject to amortization	$ 8,400	8,400
Minimum
Intangible assets
Amortization period of intangible assets	5 years
Maximum
Intangible assets
Amortization period of intangible assets	20 years
Patents and licenses
Intangible assets
Intangible assets, gross	$ 3,766	3,766
Customer relationships
Intangible assets
Intangible assets, gross	6,946	6,946
Other intangibles
Intangible assets
Intangible assets, gross	1,882	1,882
Brand names
Intangible assets
Intangible assets, gross	$ 11,819	$ 11,819

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

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Amount before accumulated amortization of intangible assets, excluding goodwill.

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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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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