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Share-based compensation - Options (Details) - $ / shares | 3 Months Ended
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Mar. 31, 2024 | Mar. 31, 2023
Share-based compensation |  |
Number of options over ordinary shares granted (in shares) | 37,097,688 | 21,755,328
Weighted average fair value of ordinary shares options (in dollars per share) | $ 0.12 | $ 0.25
Number of additional options with a nominal exercise price granted | 26,984,352 | 19,866,912
Weighted average fair value of options with a nominal exercise price | $ 0.14 | $ 0.32

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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. + References No definition available. + Details
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- Definition Gross number of share options (or share units) granted with nominal exercise price during the period. + References No definition available. + Details
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- Definition Gross number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(01) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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