v3.21.1

STOCK-BASED COMPENSATION - Valuation Assumptions (Details) - $ / shares	3 Months Ended
	Apr. 04, 2021	Mar. 29, 2020
Valuation Assumptions
Weighted-average fair value of options granted during the period	$ 2.74	$ 1.86
Expected life (in years)	2 years 6 months	4 years 8 months 12 days
Expected dividend	0.00%	0.00%
Expected stock volatility	76.48%	51.21%
Risk-free interest rate	0.20%	1.60%

X

- References

No definition available.

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

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- Definition

Rate of weighted-average expected volatility for award under share-based payment arrangement.

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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