Stockholders' Equity and Stock-Based Compensation - Weighted Average Assumptions for Fair Value Stock-Based Awards (Options) (Details)	3 Months Ended
Apr. 03, 2021	Mar. 28, 2020
Weighted average assumptions for fair value estimate of stock-based awards (options)
Average risk free interest rate	0.74%	0.46%
Expected life (in years)	4 years 5 months 12 days	4 years 6 months 18 days
Average volatility	72.00%	57.00%

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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

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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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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