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Share-based compensation - Narratives (Details) | 12 Months Ended
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Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Share-based compensation |  |  |
Number of shares granted | 2,358,458 | 1,801,088 |
Share-based compensation expenses | $ 4,100,000 | $ 3,900,000 | $ 600,000
Bottom of range |  |  |
Share-based compensation |  |  |
Incremental discount rate | 10.00% |  |
Top of range |  |  |
Share-based compensation |  |  |
Option exercisable term (in years) | 10 years |  |
Incremental discount rate | 25.00% |  |
Vesting schemes one |  |  |
Share-based compensation |  |  |
Vesting period | 36 months |  |
Vesting percentage | 25.00% |  |
Vesting percentage of remaining awards | 75.00% |  |
Vesting percentage total | 100.00% |  |
Vesting schemes two |  |  |
Share-based compensation |  |  |
Vesting period | 48 months |  |
Vesting percentage total | 100.00% |  |
Vesting schemes three |  |  |
Share-based compensation |  |  |
Vesting period | 12 months |  |
Vesting percentage total | 100.00% |  |

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- Definition The amount of expense arising from share-based payment transactions in which the goods or services received did not qualify for recognition as assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2022-03-24 -Paragraph 51 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2022-en-r&anchor=para_51_a&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The number of share options granted in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2022-03-24 -Paragraph 45 -Subparagraph b -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2022-en-r&anchor=para_45_b_ii&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. + References No definition available. + Details
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- Definition Percentage of vesting of remaining award under share-based payment arrangement. + References No definition available. + Details
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