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Stock-Based Compensation - Valuation Assumptions (Details) - $ / shares | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Employee stock options |  |  |
Valuation Assumptions |  |  |
Expected volatility, low end of range |  | 61.60% | 42.90%
Expected volatility, high end of range |  |  | 61.50%
Risk-free interest rate, low end of range |  | 3.30% | 0.10%
Risk-free interest rate, high end of range |  |  | 1.40%
Dividend rate |  | 0.00% | 0.00%
ESPP |  |  |
Valuation Assumptions |  |  |
Expected term (in years) | 6 months | 6 months | 6 months
Expected volatility, low end of range | 45.80% | 73.20% | 46.40%
Expected volatility, high end of range | 57.10% | 97.30% | 58.70%
Risk-free interest rate, low end of range | 5.30% | 1.50% | 0.00%
Risk-free interest rate, high end of range | 5.40% | 4.50% | 0.10%
Dividend rate | 0.00% | 0.00% | 0.00%
Minimum | Employee stock options |  |  |
Valuation Assumptions |  |  |
Fair value of common stock (in dollars per share) |  | $ 85.17 | $ 268.55
Expected term (in years) |  | 6 years 7 days | 3 months 18 days
Minimum | ESPP |  |  |
Valuation Assumptions |  |  |
Fair value of common stock (in dollars per share) | $ 47.36 | $ 50.81 | $ 297.20
Maximum | Employee stock options |  |  |
Valuation Assumptions |  |  |
Fair value of common stock (in dollars per share) |  |  | $ 409.21
Expected term (in years) |  |  | 6 years 4 months 20 days
Maximum | ESPP |  |  |
Valuation Assumptions |  |  |
Fair value of common stock (in dollars per share) | $ 61.55 | $ 99.68 | $ 310.80

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- Definition Fair value of common stock per share during the period. + References No definition available. + Details
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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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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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. + References No definition available. + Details
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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. + References No definition available. + Details
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- Definition The maximum risk-free interest rate assumption that is used in valuing an option on its own shares. + References No definition available. + Details
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- Definition The minimum risk-free interest rate assumption that is used in valuing an option on its own shares. + References No definition available. + Details
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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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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