Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Segmentation - Summary of the Amount of Revenue from External Customers (Detail)

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Segmentation - Summary of the Amount of Revenue from External Customers (Detail) - EUR (€)
€ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of Revenue From External Customers [Line Items]      
Revenue from contracts with customers € 145,453 € 133,900 € 86,291
The Netherlands      
Disclosure of Revenue From External Customers [Line Items]      
Revenue from contracts with customers 73,737 46,302 29,689
Belgium      
Disclosure of Revenue From External Customers [Line Items]      
Revenue from contracts with customers 21,364 10,692 4,358
Germany      
Disclosure of Revenue From External Customers [Line Items]      
Revenue from contracts with customers 22,553 15,045 14,477
France      
Disclosure of Revenue From External Customers [Line Items]      
Revenue from contracts with customers 23,289 55,815 32,098
Other      
Disclosure of Revenue From External Customers [Line Items]      
Revenue from contracts with customers € 4,510 € 6,046 € 5,669