Share-based compensation - Options (Details) - $ / shares |
12 Months Ended | ||
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Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
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| Options granted on market value at grant date | |||
| Number of options over ordinary shares granted (in shares) | 21,300,998 | 15,595,374 | 15,679,383 |
| Weighted average fair value of ordinary shares options (in dollars per share) | $ 0.70 | $ 0.59 | $ 0.48 |
| Options with nominal exercise price | |||
| Number of additional options with a nominal exercise price granted | 17,765,778 | 8,282,152 | 8,020,410 |
| Weighted average fair value of options with a nominal exercise price | $ 0.97 | $ 0.85 | $ 0.86 |
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the nominal exercise price. No definition available.
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- Definition Gross number of share options (or share units) granted with nominal exercise price during the period. No definition available.
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- Definition Gross number of share options (or share units) granted during the period. No definition available.
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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