Share-based compensation - Employee Share Purchase Plan (Details) - shares |
9 Months Ended | ||
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Sep. 30, 2025 |
Sep. 30, 2024 |
Jun. 30, 2018 |
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| Employee Share Purchase Plan | Employee Stock | |||
| Share-based compensation | |||
| Number of shares issued | 0 | 10,150 | |
| Ordinary shares available for issue | 86,712 | 86,712 | 150,000 |
| 2014 Plan | |||
| Share-based compensation | |||
| Ordinary shares available for issue | 4,414,685 | ||
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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 difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Number of shares issued under share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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