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Other Income and Expenses - Other Operating Income (Details) - EUR (€)
€ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Other Income and Expenses        
Government grants € 572 € 535 € 1,749 € 1,940
Currency gains 139 (23) 67 (60)
Others 300 144 837 485
Total other operating income € 1,011 € 679 € 2,653 € 2,425