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Operating expenses (Tables) | 6 Months Ended
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Jun. 30, 2024
Analysis of income and expense [abstract] |
Disclosure of expenses by nature | Operating expenses
(in thousands of euro) | June 30, 2024 | June 30, 2023
| R&D | G&A | Total | R&D | G&A | Total
Subcontracting costs(1) | (15,585) | — | (15,585) | (15,857) | — | (15,857)
Cost of supplies and consumable materials | (1,485) | (153) | (1,638) | (1,410) | (100) | (1,510)
Personnel expenses other than share-based compensation | (7,532) | (3,470) | (11,002) | (7,781) | (3,871) | (11,652)
Share-based compensation | (1,175) | (531) | (1,706) | (905) | (496) | (1,401)
Personnel expenses | (8,707) | (4,001) | (12,708) | (8,686) | (4,367) | (13,053)
Non-scientific advisory and consulting(2) | (124) | (1,934) | (2,058) | (532) | (1,662) | (2,194)
Leasing and maintenance | (490) | (710) | (1,200) | (470) | (445) | (915)
Travel expenses and meeting attendance | (272) | (151) | (423) | (180) | (143) | (323)
Marketing, communication and public relations | (16) | (164) | (180) | (34) | (142) | (176)
Scientific advisory and consulting(3) | (933) | — | (933) | (561) | — | (561)
Other purchases and external expenses | (10) | (1,125) | (1,135) | (13) | (1,153) | (1,166)
Depreciation and amortization | (643) | (503) | (1,146) | (3,044) | (601) | (3,645)
Intellectual property expenses | (568) | (128) | (696) | (570) | (68) | (638)
Other income and (expenses), net | (242) | (714) | (956) | (98) | (464) | (562)
Total operating expenses | (29,076) | (9,582) | (38,657) | (31,453) | (9,144) | (40,597)
(1)The Company subcontracts a significant part of its pre-clinical (pharmaceutical development, tolerance studies and other model experiments, etc.) and clinical operations (coordination of trials, hospital costs, etc.) to third parties. (2)Non-scientific advisory and consulting are services performed to support the general and administration activities of the Company, such as legal, accounting and audit fees as well as business development support. (3)Scientific advisory and consulting expenses relate to consulting services performed by third parties to support the research and development activities of the Company.

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