Stock-Based Compensation - Summary of Fair Values of Stock Options Granted and Assumptions used in Black-Scholes Model (Detail) - Stock Options [Member] - $ / shares |
12 Months Ended | ||
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Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Estimated fair values of stock options granted | $ 0.86 | $ 3.61 | $ 3.24 |
| Minimum [Member] | |||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Risk-free interest rate | 1.90% | 0.60% | 0.30% |
| Expected volatility | 89.70% | 80.10% | 77.40% |
| Expected term (in years) | 5 years 6 months | 5 years 6 months | 6 years |
| Maximum [Member] | |||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Risk-free interest rate | 3.50% | 1.20% | 1.70% |
| Expected volatility | 92.80% | 91.00% | 81.20% |
| Expected term (in years) | 6 years 10 months 24 days | 6 years 6 months | 10 years |
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- Definition Share based compensation arrangement by share based payment award estimated fair value of stock options granted. No definition available.
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- Definition 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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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://www.xbrl.org/2003/role/disclosureRef
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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://www.xbrl.org/2003/role/disclosureRef
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