Stock Option Plans - Schedule of the assumptions employed in the calculation of the fair value of share-based compensation expense (Detail) - USD ($) |
6 Months Ended | |
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Jun. 30, 2026 |
Jun. 30, 2025 |
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| Schedule Of Share Based Compensation Stock Options Activity [Line Items] | ||
| Risk free interest rate minimum | 3.82% | 4.04% |
| Risk free interest rate maximum | 4.04% | 4.66% |
| Dividend yield | 0.00% | 0.00% |
| Expected term | 6 years | 6 years |
| Expected stock volatility minimum | 101.20% | 101.90% |
| Expected stock volatility maximum | 105.60% | 103.00% |
| Common Stock [Member] | ||
| Schedule Of Share Based Compensation Stock Options Activity [Line Items] | ||
| Common stock fair value (weighted-average) | $ 1.33 | $ 3.39 |
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- Definition Schedule Of Share Based Compensation Stock Options Activity Line Items No definition available.
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- Definition Fair value of the entity's equity. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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://www.xbrl.org/2003/role/disclosureRef
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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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The maximum 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 The minimum 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 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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- Details
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