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Cash and Cash Equivalents - Disclosure Of Significant non cash transactions from investing and financing activities (Detail) - EUR (€)
€ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Significant non cash transactions from investing and financing activities [Line Items]    
Fair value changes in derivative warrant liabilities € (6,476) € (80,748)
Addition of lease liabilities 1,386 8,517
ARES [Member]    
Significant non cash transactions from investing and financing activities [Line Items]    
Issuance of shares for the acquisition of a significant non-cash investing activity 0 6,300
Electromaps [Member]    
Significant non cash transactions from investing and financing activities [Line Items]    
Issuance of shares for the acquisition of a significant non-cash investing activity 0 1,500
Coil [Member]    
Significant non cash transactions from investing and financing activities [Line Items]    
Issuance of shares for the acquisition of a significant non-cash investing activity € 2,317 € 0