Stock-Based Compensation - Employee Stock Purchase Plan, Valuation Assumptions (Details) - Employee Stock - $ / shares |
12 Months Ended | ||
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Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
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| Risk-free interest rate, minimum | 0.04% | 0.12% | 1.59% |
| Risk free interest rate, maximum | 0.06% | 0.15% | 2.43% |
| Dividend yield | 0.00% | 0.00% | 0.00% |
| Expected life (in years) | 6 months | 6 months | 6 months |
| Volatility, minimum | 43.83% | 59.72% | 40.47% |
| Volatility, maximum | 61.10% | 93.25% | 43.14% |
| Minimum | |||
| Weighted Average Grant Date Fair Value (in dollars per share) | $ 10.85 | $ 6.41 | $ 5.48 |
| Maximum | |||
| Weighted Average Grant Date Fair Value (in dollars per share) | $ 18.82 | $ 8.66 | $ 6.61 |
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- Definition Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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 estimated measure of the maximum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. No definition available.
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- Definition The estimated measure of the minimum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. No definition available.
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- Definition The maximum risk-free interest rate assumption that is used in valuing an option on its own shares. No definition available.
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- Definition The minimum risk-free interest rate assumption that is used in valuing an option on its own shares. 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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