Common Stock and Stock-Based Incentive Compensation Plans - Weighted Average Valuation Assumptions for ESPP (Details) - ESPP |
12 Months Ended | ||
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Dec. 26, 2020 |
Dec. 28, 2019 |
Dec. 29, 2018 |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Expected dividends | 0.00% | 0.00% | 0.00% |
| Expected term (in years) | 6 months | 6 months | 6 months |
| Minimum | |||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Expected volatility | 55.16% | 48.95% | 45.88% |
| Risk-free interest rate | 0.11% | 1.58% | 2.05% |
| Maximum | |||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Expected volatility | 66.53% | 67.02% | 66.66% |
| Risk-free interest rate | 0.15% | 0.0246% | 2.52% |
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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. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Rate of weighted-average expected volatility for award under share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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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. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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