General information - Revision of comparative figures (Details) - EUR (€) € in Thousands	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Equity attributable to owners of the Company	€ 59,007		€ 67,064
Deferred income	70,652		71,210
Revenue	655	€ 1,130
Finance income and expense	(544)	(822)
Net result	(8,855)	(14,117)
Equity	58,701	101,430	66,680	€ 114,109
Changes in working capital	(52,290)	3,950
Accumulated Deficit
Net result	(8,933)	(14,109)
Equity	€ (383,992)	(330,831)	(379,110)	(316,890)
Increase (decrease) due to corrections of prior period errors
Equity attributable to owners of the Company			1,567
Deferred income			€ (1,567)
Revenue		(104)
Finance income and expense		437
Net result		333
Changes in working capital		€ 104
Increase (decrease) due to corrections of prior period errors \| Accumulated Deficit
Equity				€ 880

The amount of residual interest in the assets of the entity after deducting all its liabilities.

The total of income less expenses from continuing and discontinued operations, excluding the components of other comprehensive income. [Refer: Other comprehensive income]

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+ Details

- Definition

The income arising in the course of an entity's ordinary activities. Income is increases in assets, or decreases in liabilities, that result in increases in equity, other than those relating to contributions from holders of equity claims.

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+ Details