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Notes to the Profit or Loss Statement - Summary of Income Taxes - Additional Information (Detail) - EUR (€)
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Analysis of income and expense [abstract]      
Corporate tax rate 15.00%    
Solidarity surcharge 5.50%    
Effective trade tax rate 10.85%    
Expected Tax Rate 26.675% 26.675% 26.675%
Federal corporate income tax rate 21.00%    
Average state tax rate 6.38%    
Income Tax Benefit / (Expenses) € (1,188,537) € 168,578,523 € (76,590,860)
Current tax expense (income) and adjustments for current tax of prior periods € (1,500,000)