LEASES - Lease Cost (Details) $ in Thousands	12 Months Ended
Dec. 28, 2019 USD ($)
Leases [Abstract]
Operating lease costs	$ 8,002
Finance lease cost - amortization of right-of-use assets	88
Finance lease cost - interest on lease liabilities	30
Short-term lease cost	249
Variable lease cost	2,806
Sublease income	(743)
Lease, Cost, Total	$ 10,432
Weighted average remaining lease term:
Operating lease, weighted average remaining lease term	7 years 3 days
Finance lease, weighted average remaining lease term	4 years 8 months 4 days
Finance leases
Operating lease, weighted average discount rate, percent	6.62%
Finance lease, weighted average discount rate, percent	6.24%

Amount of interest expense on finance lease liability.

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Amount of amortization expense attributable to right-of-use asset from finance lease.

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Weighted average discount rate for finance lease calculated at point in time.

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Weighted average remaining lease term for finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of lease cost recognized by lessee for lease contract.

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Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

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Weighted average discount rate for operating lease calculated at point in time.

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of short-term lease cost, excluding expense for lease with term of one month or less.

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Amount of sublease income excluding finance and operating lease expense.

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Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases.

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Leases, Weighted Average Discount Rate [Abstract]

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