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Assumptions to Estimate Fair Value for Stock Options at Grant Date (Detail) - Time Vested Stock Options	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Sep. 30, 2023	Sep. 30, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk-free interest rate, minimum	4.61%	4.18%	3.58%	2.41%
Risk-free interest rate, maximum	4.70%	4.30%	4.70%	4.30%
Expected volatility, minimum	56.00%	52.00%	53.00%	51.00%
Expected volatility, maximum	64.00%	63.00%	64.00%	63.00%
Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected life (in years)	4 years	4 years	4 years	4 years
Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected life (in years)	6 years 3 months	6 years 3 months	6 years 3 months	6 years 3 months

X

- 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.

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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

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- Definition

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

+ References

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

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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.

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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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