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Cash, cash equivalents, short-term investments and non-current financial assets - Additional information (Details)
€ in Thousands
 6 Months Ended
Jun. 30, 2024
EUR (€)
Rate
shares
Jun. 30, 2023
EUR (€)
Dec. 31, 2023
EUR (€)
Disclosure of financial assets [Line Items]      
Number of SICAV held (in units/shares) | shares 3    
Cash, cash equivalents and financial assets € 102,149   € 102,252
Non-current financial assets, variation of fair value through the consolidated statement of income (loss) 553 € 772  
Short-term investments, variation of fair value through the consolidated statement of income (loss) € 438 € 271  
SICAV and mutual funds | Minimum      
Disclosure of financial assets [Line Items]      
Risk profile rate | Rate 1    
SICAV and mutual funds | Maximum      
Disclosure of financial assets [Line Items]      
Risk profile rate | Rate 7    
Cash, cash equivalents, and financial assets denominated in US dollars      
Disclosure of financial assets [Line Items]      
Cash, cash equivalents and financial assets € 18,221   € 20,798