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Trade and Other Receivables - Additional Information (Details) - EUR (€)
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Trade and Other Receivables.        
Contract assets € 37,609,000 € 8,880,000 € 19,999,000 € 843,000
Contract fulfilment costs € 8,500,000 € 0 € 0