Post-effective amendment to a registration statement that is not immediately effective upon filing

Related-party transactions - Additional Information (Detail)

v3.22.2.2
Related-party transactions - Additional Information (Detail) - EUR (€)
€ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Jul. 28, 2021
Mar. 26, 2021
Related Party Transactions [Line Items]          
Percentage of voting equity interests acquired 100.00%       100.00%
Share-based payment expenses € 89,636 € 2,450 € 0    
Mega E [Member]          
Related Party Transactions [Line Items]          
Percentage of voting equity interests acquired       100.00%  
General and administrative Expenses [Member]          
Related Party Transactions [Line Items]          
Share-based payment expenses 89,636 2,450 0    
External Consulting Services [Member]          
Related Party Transactions [Line Items]          
Share-based payment expenses € 202,201 € 4,650 € 0