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Share-based compensation - Narrative (Details) |  |  | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Apr. 04, 2023 $ / shares shares | Mar. 22, 2021 shares | Sep. 30, 2023 USD ($) shares $ / shares | Sep. 30, 2022 USD ($) shares $ / shares | Sep. 30, 2023 USD ($) shares $ / shares | Sep. 30, 2022 USD ($) shares $ / shares | Dec. 31, 2022 shares | Nov. 30, 2019 shares
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
Expense recognized | $ |  |  | $ 2,083,000 | $ 14,565,000 | $ 11,275,000 | $ 41,781,000 |  |
Share-based compensation expense | $ |  |  | $ 2,083,000 | 14,565,000 | $ 11,275,000 | 41,781,000 |  |
Number of share options outstanding in share-based payment arrangement (in shares) | shares |  |  | 10,782,033 |  | 10,782,033 |  | 10,755,494 |
Average strike price in USD per share, Option Exchange - Granted (in USD per share) |  |  |  |  | $ 2.06 |  |  |
Expected dividends | $ |  |  | $ 0 | $ 0 | $ 0 | $ 0 |  |
Number of awards, Option Exchange - Granted (in shares) | shares |  |  |  |  | 898,585 |  |  |
Maximum |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
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% |  |
Minimum |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
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% |  |
Risk-free interest rate, in % |  |  | 411.00% | 2.61% | 3.39% | 1.46% |  |
Share Options |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
Vesting period |  |  |  |  | 3 years |  |  |
Share-based compensation expense | $ |  |  | $ 1,277,000 | $ 8,193,000 | $ 5,343,000 | $ 27,158,000 |  |
Contractual term |  |  |  |  | 10 years |  |  |
Number of instruments granted in share-based payment arrangement | shares |  | 2,026,341 | 2,005,000 | 14,565,000 | 10,992,000 | 42,293,000 |  |
Weighted-average grant-date fair value (in dollars per share) |  |  | $ 1.41 |  |  |  |  |
Awards vested and exercisable (in shares) | shares |  |  | 3,789,960 |  | 3,789,960 |  |  |
Weighted average strike price, vested and exercisable (in dollars per share) |  |  |  |  | $ 23.19 |  |  |
Weighted average remaining life, vested and exercisable |  |  |  |  | 6 years 5 months 26 days |  |  |
Share Options | Tranche One |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
Vesting percentage |  |  |  |  | 25.00% |  |  |
Share Options | Tranche Two |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
Vesting percentage |  |  |  |  | 25.00% |  |  |
Share Options | Tranche Three |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
Vesting percentage |  |  |  |  | 25.00% |  |  |
Share Options | Tranche Four |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
Vesting percentage |  |  |  |  | 25.00% |  |  |
Restricted Share Units (RSU) |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
Vesting period |  |  |  |  | 3 years |  |  |
Contractual term |  |  |  |  | 10 years |  |  |
Shares vested (in shares) | shares |  |  |  |  | 1,323,841 |  |  |
Number of instruments granted in share-based payment arrangement | shares |  | 538,175 | 728,000 |  | 5,649,000 |  |  |
Weighted average grant date fair value, granted (in USD per share) |  |  |  |  | $ 2.13 |  |  |
2019 Equity Incentive Plan |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
Number of shares reserved for issue under options and contracts for sale of shares | shares |  |  | 3,388,272 |  | 3,388,272 |  |  | 17,741,355
Share-based compensation expense | $ |  |  |  |  | $ 156,094,000 |  |  |
Annual Equity Award | Restricted Share Units (RSU) |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
Weighted average grant date fair value, granted (in USD per share) |  |  |  |  | $ 1.99 |  |  |
Equity Exchange Program |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
Average strike price in USD per share, Option Exchange - Granted (in USD per share) | $ 2.06 |  |  |  | $ 2.06 |  |  |
Expected dividends | $ |  |  | $ 0 |  |  |  |  |
Number of awards, Option Exchange - Granted (in shares) | shares | 900,000 |  |  |  |  |  |  |
Number Of Share Options Exchanged | shares | 2,200,000 |  |  |  |  |  |  |
Equity Exchange Program | Maximum |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
Expected volatility, in % |  |  | 79.00% |  |  |  |  |
Risk-free interest rate, in % |  |  | 3.31% |  |  |  |  |
Exercise price of share options granted in share-based payment arrangement | $ 48.77 |  |  |  |  |  |  |
Equity Exchange Program | Minimum |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |
Expected volatility, in % |  |  | 77.00% |  |  |  |  |
Risk-free interest rate, in % |  |  | 3.29% |  |  |  |  |
Exercise price of share options granted in share-based payment arrangement | $ 8.12 |  |  |  |  |  |  |

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