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Operating expenses - Schedule of Depreciation, Amortization and Provision Expenses (Details) - EUR (€) € in Thousands | 6 Months Ended
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Jun. 30, 2025 | Jun. 30, 2024
Disclosure Of Operating Expenses |  |
Amortization expense of intangible assets | € (2) | € (2)
Amortization expense of tangible assets | (798) | (785)
Reversal of provision for disputes and charges | 320 | 14
Provision for disputes and charges | (49) | (210)
Total depreciation, amortization and provision expenses (except IAS 19) | (529) | (983)
Total Provision for retirement benefit obligations (IAS 19) | (40) | (33)
Total depreciation, amortization and provision expenses | (569) | (1,016)
R&D |  |
Disclosure Of Operating Expenses |  |
Amortization expense of intangible assets | (2) | (1)
Amortization expense of tangible assets | (645) | (621)
Reversal of provision for disputes and charges | 80 | 0
Provision for disputes and charges | (43) | (60)
Total depreciation, amortization and provision expenses (except IAS 19) | (610) | (682)
Total Provision for retirement benefit obligations (IAS 19) | (27) | (23)
Total depreciation, amortization and provision expenses | (637) | (705)
SG&A |  |
Disclosure Of Operating Expenses |  |
Amortization expense of intangible assets | (1) | 0
Amortization expense of tangible assets | (152) | (164)
Reversal of provision for disputes and charges | 240 | 14
Provision for disputes and charges | (7) | (150)
Total depreciation, amortization and provision expenses (except IAS 19) | 80 | (301)
Total Provision for retirement benefit obligations (IAS 19) | (13) | (10)
Total depreciation, amortization and provision expenses | € 68 | € (311)

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- Definition The amount used (ie incurred and charged against the provision) for other provisions. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2025-01-01 -Paragraph 84 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2025-en-r&anchor=para_84_c&doctype=Standard -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 257 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_257_c&doctype=Standard -URIDate 2025-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 257 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_257_c&doctype=Standard -URIDate 2025-03-27 + Details
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