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Operating expenses (Tables) | 6 Months Ended
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Jun. 30, 2025
Analysis of income and expense [abstract] |
Schedule of Research and Development Expenses |
| For the six-month period ended June 30,
(in thousands of euros) | 2025 |  | 2024
Purchases, sub-contracting and other expenses | (7,489) |  |  | (15,105) |
Payroll costs (including share-based payments) | (6,430) |  |  | (6,199) |
Depreciation, amortization and provision expenses(1) | (610) |  |  | (682) |
Total research and development expenses | (14,529) |  |  | (21,987) |
(1)see Note 17.4 Depreciation, amortization and provision expenses
Schedule of Selling, General and Administrative Expenses |
| For the six-month period ended June 30,
(in thousands of euros) | 2025 |  | 2024
Purchases, fees and other expenses | (4,334) |  |  | (4,183) |
Payroll costs (including share-based payments) | (7,040) |  |  | (6,336) |
Depreciation, amortization and provision expenses (1) | 80 |  |  | (301) |
Total SG&A expenses | (11,294) |  |  | (10,819) |
(1)see Note 17.4 Depreciation, amortization and provision expenses
Schedule of Payroll Costs |
| For the six-month period ended June 30,
(in thousands of euros) | 2025 |  | 2024
Wages and salaries | (7,182) |  |  | (7,238) |
Payroll taxes | (4,088) |  |  | (3,324) |
Share-based payments | (2,161) |  |  | (1,940) |
Retirement benefit obligations | (40) |  |  | (33) |
Total payroll costs | (13,470) |  |  | (12,535) |
Average headcount | 104 |  |  | 105 |
End-of-period headcount | 103 |  |  | 110 |
Schedule of Depreciation, Amortization and Provision Expenses | Depreciation, amortization and provision expenses by function are detailed as follows:
| For the six month period ended June 30, 2025
(in thousands of euros) | R&D | SG&A | Total
Amortization expense of intangible assets | (2) |  | (1) |  | (2) |
Amortization expense of tangible assets | (645) |  | (152) |  | (798) |
Reversal of provision for disputes and charges | 80 |  | 240 |  | 320 |
Provision for disputes and charges | (43) |  | (7) |  | (49) |
Total depreciation, amortization and provision expenses (except IAS 19) | (610) |  | 80 |  | (529) |
Total Provision for retirement benefit obligations (IAS 19) (1) | (27) |  | (13) |  | (40) |
Total depreciation, amortization and provision expenses | (637) |  | 68 |  | (569) |
| For the six month period ended June 30, 2024
(in thousands of euros) | R&D | SG&A | Total
Amortization expense of intangible assets | (1) |  | — |  | (2) |
Amortization expense of tangible assets | (621) |  | (164) |  | (785) |
Reversal of provision for disputes and charges | — |  | 14 |  | 14 |
Provision for disputes and charges | (60) |  | (150) |  | (210) |
Total depreciation, amortization and provision expenses (except IAS 19) | (682) |  | (301) |  | (983) |
Total Provision for retirement benefit obligations (IAS 19) (1) | (23) |  | (10) |  | (33) |
Total depreciation, amortization and provision expenses | (705) |  | (311) |  | (1,016) |
(1) Details of the provision for retirement benefit obligations are provided in note 11
Schedule of Other Operating Income (Expenses) |
| For the six-month period ended June 30,
(in thousands of euros) | 2025 |  | 2024
Other non recurring expenses | (12) |  |  | (137) |
Other non recurring income | 5 |  |  | 3 |
Total other operating income and expenses | (7) |  |  | (134) |

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