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Net other Operating Income and Expenses (Details) - EUR (€)
€ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Net other Operating Income and Expenses    
Other operating income € 2,286 € 3,000
Other operating expenses (251) (2,863)
Net other operating income and expenses 2,035 € 137
Aggregate purchase price for each main crane of both O-class vessels sold 1,500  
Impairment loss reflected in the profit and loss € 5,000