Income tax - Schedule of Reconciliation Between Statutory and Effective Income Tax (Details) - EUR (€) € in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
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| Income taxes paid (refund) [abstract] | |||
| Net loss | € (23,961) | € (68,132) | € (39,700) |
| Effective tax expense | 3 | 101 | 120 |
| Recurring loss before tax | € (23,959) | € (68,031) | € (39,580) |
| Theoretical tax rate (statutory rate in France) | 25.00% | 25.00% | 25.00% |
| Theoretical tax (benefit) expense | € (5,990) | € (17,008) | € (9,895) |
| Share-based payment | 885 | 1,074 | 805 |
| Other permanent differences | (108) | 195 | (660) |
| Other non-taxable items (CIR) | (704) | (811) | (985) |
| Unrecognized deferred tax on timing differences and tax losses | 5,920 | 16,651 | 10,854 |
| Effective tax expense | € 3 | € 101 | € 120 |
| Effective tax rate | 0.00% | (0.10%) | (0.30%) |
| X | ||||||||||
- Definition The amount of profit (loss) for a period before deducting tax expense. [Refer: Profit (loss)] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The applicable income tax rate. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The tax expense (income) divided by the accounting profit. [Refer: Accounting profit] 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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- References No definition available.
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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 revenues that are exempt from taxation. [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 Tax Effect Of Share-Based Payment Arrangements No definition available.
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