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Prepayments and Other Receivables (Details) - EUR (€)
€ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Prepayments and Other Receivables.    
Prepayments € 1,903 € 2,410
Other receivables 1,467 835
Accrued income from Rett Syndrome Research Trust 502 502
Total Prepayments and Other Receivables € 3,872 € 3,747