Income tax - Reconciliation of Income Taxes Computed at the French Statutory Rate (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
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Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
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| Income Taxes [Abstract] | |||
| Applicable tax rate | 25.00% | ||
| Profit (loss) before income taxes | $ (108,447) | $ 61,104 | $ (38,316) |
| At France’s statutory income tax rate of 25% in 2023, 2024 and in 2025 | (27,112) | 15,276 | (9,579) |
| Impact of French income taxed under IP Box regime at 10% | 0 | (8,793) | 0 |
| Non-deductible share-based payment expense | 753 | 1,023 | 1,776 |
| Tax credits | (429) | (955) | (1,344) |
| Permanent differences and other | 3,424 | (29) | 212 |
| Withholding tax | 235 | 0 | 2,055 |
| Use of tax loss carryforwards | 0 | (2,985) | 0 |
| Unrecognized benefit of tax losses carryforward | 23,961 | 0 | 9,554 |
| Income tax expense (benefit) | $ 832 | $ 3,537 | $ 2,674 |
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- Definition The applicable income tax rate. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that the entity does not separately disclose in the same statement or note. [Refer: Accounting profit; Applicable tax rate] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to expenses not deductible in determining taxable profit (tax loss). [Refer: Accounting profit] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to tax losses. [Refer: Accounting profit] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The product of the accounting profit multiplied by the applicable tax rate(s). [Refer: Accounting profit; Applicable tax rate] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Effect Of Tax Loss Carryforward Utilization On Tax Expense No definition available.
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- Definition Income Taxes [Abstract] No definition available.
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- Definition Tax Effect Of Tax Credits No definition available.
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- Definition Tax Effect Of Withholding Tax No definition available.
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- Definition Tax Expense(Income) At Ip Special Tax Rate No definition available.
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