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Share-based compensation expense - Schedule of Fair Value Assumptions For Options Granted (Details) | 3 Months Ended | 9 Months Ended
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Sep. 30, 2023 USD ($) shares $ / shares | Sep. 30, 2022 USD ($) shares $ / shares | Sep. 30, 2023 USD ($) shares $ / shares | Sep. 30, 2022 USD ($) shares $ / shares
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Award life, in years | shares |  | 6.08 |  | 6.08
Expected dividends | $ | $ 0 | $ 0 | $ 0 | $ 0
Minimum |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Weighted average share price (in USD per share) | $ 0.82 | $ 4.83 | $ 0.82 | $ 4.83
Strike price (in USD per share) | $ 0.82 | $ 4.83 | $ 0.82 | $ 4.83
Expected volatility, in % | 80.00% | 70.00% | 75.00% | 70.00%
Award life, in years | shares | 6.08 |  | 6.08 |
Risk-free interest rate, in % | 411.00% | 2.61% | 3.39% | 1.46%
Maximum |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Weighted average share price (in USD per share) | $ 1.51 | $ 8.54 | $ 5.45 | $ 19.69
Strike price (in USD per share) | $ 1.51 | $ 8.54 | $ 5.45 | $ 19.69
Expected volatility, in % |  | 80.00% | 80.00% | 80.00%
Risk-free interest rate, in % | 4.62% | 3.77% | 4.62% | 3.77%

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- Definition The expected volatility of the share price used to calculate the fair value of the share options granted. Expected volatility is a measure of the amount by which a price is expected to fluctuate during a period. The measure of volatility used in option pricing models is the annualised standard deviation of the continuously compounded rates of return on the share over a period of time. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2023-01-01 -Paragraph 47 -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2023-en-r&anchor=para_47_a_i&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The option life of share options granted. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2023-01-01 -Paragraph 47 -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2023-en-r&anchor=para_47_a_i&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The implied yield currently available on zero-coupon government issues of the country in whose currency the exercise price for share options granted is expressed, with a remaining term equal to the expected term of the option being valued (based on the option's remaining contractual life and taking into account the effects of expected early exercise). [Refer: Government [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2023-01-01 -Paragraph 47 -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2023-en-r&anchor=para_47_a_i&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The exercise price of share options granted. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2023-01-01 -Paragraph 47 -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2023-en-r&anchor=para_47_a_i&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of an expected dividend used to calculate the fair value of share options granted. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2023-01-01 -Paragraph 47 -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2023-en-r&anchor=para_47_a_i&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The weighted average share price used as input to the option pricing model to calculate the fair value of share options granted. [Refer: Option pricing model [member]; Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2023-01-01 -Paragraph 47 -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2023-en-r&anchor=para_47_a_i&doctype=Standard -URIDate 2023-03-23 + Details
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- Details
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