Significant Accounting Policies - Calculation of Net Loss and Number of Ordinary Shares and ADSs Used to Compute Basic and Diluted Net Loss per Ordinary Share and ADS (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
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| Loss Earnings Per Share [Line Items] | ||||
| Net loss - basic | $ (7,650) | $ (14,139) | $ (18,162) | $ (29,836) |
| Net loss - diluted | $ (7,650) | $ (14,139) | $ (18,162) | $ (29,836) |
| Weighted average shares outstanding - basic | 416,444 | 414,477 | 419,457 | 414,008 |
| Weighted average shares outstanding - diluted | 416,444 | 414,477 | 419,457 | 414,008 |
| Loss per share - basic | $ (0.02) | $ (0.03) | $ (0.04) | $ (0.07) |
| Loss per share - diluted | $ (0.02) | $ (0.03) | $ (0.04) | $ (0.07) |
| Ordinary Shares | ||||
| Loss Earnings Per Share [Line Items] | ||||
| Weighted average shares outstanding - basic | 416,444 | 414,477 | 419,457 | 414,008 |
| Weighted average shares outstanding - diluted | 416,444 | 414,477 | 419,457 | 414,008 |
| Loss per share - basic | $ (0.02) | $ (0.03) | $ (0.04) | $ (0.07) |
| Loss per share - diluted | $ (0.02) | $ (0.03) | $ (0.04) | $ (0.07) |
| American Depositary Shares | ||||
| Loss Earnings Per Share [Line Items] | ||||
| Weighted average shares outstanding - basic | 20,822 | 20,723 | 20,972 | 20,700 |
| Weighted average shares outstanding - diluted | 20,822 | 20,723 | 20,972 | 20,700 |
| Loss per share - basic | $ (0.37) | $ (0.68) | $ (0.87) | $ (1.44) |
| Loss per share - diluted | $ (0.37) | $ (0.68) | $ (0.87) | $ (1.44) |
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- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. 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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities, and addition from assumption of issuance of common shares for dilutive potential common shares; of income (loss) available to common shareholders. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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