STOCK-BASED COMPENSATION - Restricted Stock (Details) - Restricted Stock shares in Thousands	9 Months Ended
Oct. 03, 2021 $ / shares shares
Number of Awards
Unvested at beginning of period \| shares	475
Granted \| shares	53
Exercised/Released \| shares	(168)
Canceled, forfeited, or expired \| shares	(55)
Unvested at end of period \| shares	305
Weighted Average Award Date Fair Value
Unvested at beginning of period \| $ / shares	$ 4.43
Granted \| $ / shares	13.25
Exercised/Released \| $ / shares	4.93
Canceled, forfeited or expired \| $ / shares	4.30
Unvested at end of period \| $ / shares	$ 5.71
Weighted Average Remaining Contractual Life
Unvested at end of period	14 years 9 months 18 days

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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