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

Notes to the Profit or Loss Statement -Revenue Narrative (Detail) - EUR (€)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure Of Analysis Of Revenue Line Item [Line Items]
Revenue	€ 238,278,313	€ 278,267,003	€ 179,611,844
Customer 1
Disclosure Of Analysis Of Revenue Line Item [Line Items]
Percentage of accounts receivable	4700.00%	3500.00%	3600.00%
Customer 2
Disclosure Of Analysis Of Revenue Line Item [Line Items]
Percentage of accounts receivable	1600.00%	1500.00%	1400.00%
Customer 3
Disclosure Of Analysis Of Revenue Line Item [Line Items]
Percentage of accounts receivable	1500.00%	1200.00%	900.00%
Switzerland
Disclosure Of Analysis Of Revenue Line Item [Line Items]
Revenue	€ 25,600,000	€ 28,000,000
United Kingdom
Disclosure Of Analysis Of Revenue Line Item [Line Items]
Revenue			€ 16,000,000