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Stock Based Compensation - Fair Values of Award Granted Estimated Using Black-Scholes Valuation Model (Detail) - Time-Based and Performance-Based Awards - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Weighted-average grant-date fair value (USD per share)	$ 5.09	$ 7.23	$ 6.97	$ 7.25
Risk-free interest rate, minimum (%)	3.84%		3.84%
Risk-free interest rate, maximum (%)	3.91%		4.40%
Risk-free interest rate (%)		3.70%		3.70%
Expected option life (in years)		5 years 10 months 24 days		5 years 10 months 24 days
Volatility, minimum (%)			81.50%
Volatility, maximum (%)			84.30%
Volatility (%)	81.50%	84.10%		84.10%
Minimum
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Expected option life (in years)	5 years 9 months 21 days		5 years 3 months 7 days
Maximum
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Expected option life (in years)	6 years 29 days		6 years 4 months 28 days

X

- Definition

Share based compensation arrangement by share based payment award weighted average share price.

+ References

No definition available.

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The estimated measure of the 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.

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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.

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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.

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

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

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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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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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