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Income Taxes - Additional Information (Details) - EUR (€)
€ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Significant Change in Unrecognized Tax Benefits is Reasonable Possible [Line Items]      
Utilization of non-recognized tax losses offset     € (13)
Tax losses to be carried forward € 13,000 € 13,000 12,000
Denmark      
Significant Change in Unrecognized Tax Benefits is Reasonable Possible [Line Items]      
Utilization of non-recognized tax losses offset 0 0 13
Cyprus      
Significant Change in Unrecognized Tax Benefits is Reasonable Possible [Line Items]      
Utilization of non-recognized tax losses offset € 5 € 5 € 5