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Net financial income (loss) - Disclosure of Net Financial Income (loss) (Details) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income, expense, gains or losses of financial instruments [abstract]
Income from cash and cash equivalents	€ 2,629	€ 1,217	€ 256
Foreign exchange gains	5,220	785	3,277
Total financial income	7,849	2,002	3,533
Interest cost	(7,916)	(7,779)	(5,599)
Net impact of accretion, discounting and catch-up on EIB loan	2,832	285	(6,855)
Lease debt interests	(170)	(203)	(238)
Losses on fair value variation	0	(4,230)	0
Foreign exchange losses	(2,235)	(2,877)	(1,171)
Financial expenses	(7,488)	(14,803)	(13,863)
Net financial income (loss)	€ 361	€ (12,801)	€ (10,329)

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- Definition

The amount of costs associated with financing activities of the entity.

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The amount of income associated with interest and other financing activities of the entity.

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The amount of income or cost associated with interest and other financing activities of the entity.

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- Definition

The amount of exchange differences recognised in profit or loss that arise from foreign currency transactions, excluding those arising on financial instruments measured at fair value through profit or loss in accordance with IFRS 9. [Refer: At fair value [member]; Classes of financial instruments [domain]]

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The amount of interest expense on lease liabilities. [Refer: Lease liabilities]

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The amount of interest income on cash and bank balances at central banks. [Refer: Interest income; Cash and bank balances at central banks]

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The net gain arising from exchange differences recognised in profit or loss, excluding those arising on financial instruments measured at fair value through profit or loss in accordance with IFRS 9. [Refer: Foreign exchange gain (loss)]

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