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Changes in Significant Accounting Policies - Additional Information (Detail) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disclosure Of Redesignated Financial Assets And Liabilities [Line Items]
Revenue	€ 318,797	€ 328,618	€ 468,487
IFRS 16 [member]
Disclosure Of Redesignated Financial Assets And Liabilities [Line Items]
Lease incentives	0	0	635
IFRS 12 [member]
Disclosure Of Redesignated Financial Assets And Liabilities [Line Items]
Revenue	€ 750,000	€ 750,000	€ 750,000

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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

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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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