Stock-based compensation - Performance stock units, assumptions used (Details) - Performance stock units |
6 Months Ended |
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Jun. 30, 2025 | |
| Stock-based compensation | |
| Expected price volatility | 115.00% |
| Risk-free interest rate, minimum | 4.38% |
| Risk-free interest rate, maximum | 4.84% |
| Minimum | |
| Stock-based compensation | |
| Expected term (in years) | 2 years 10 months 24 days |
| Maximum | |
| Stock-based compensation | |
| Expected term (in years) | 3 years |
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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 maximum risk-free interest rate assumption that is used in valuing an option on its own shares. No definition available.
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- Definition The minimum risk-free interest rate assumption that is used in valuing an option on its own shares. No definition available.
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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 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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