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

Fair Value Measurement - Summary of Fair Value Hierarchy for Financial Assets and Liabilities that are Measured at Fair Value on Recurring Basis (Details)

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Fair Value Measurement - Summary of Fair Value Hierarchy for Financial Assets and Liabilities that are Measured at Fair Value on Recurring Basis (Details) - Fair Value Measurements on Recurring Basis - EUR (€)
€ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets, fair value € 78,420 € 266,653
Financial liabilities, fair value 508  
Current financial liabilities - derivatives    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial liabilities, fair value 20  
Non-current financial liabilities - derivatives    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial liabilities, fair value 488  
Level 1    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets, fair value 69,842 229,183
Level 2    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets, fair value 4,959 37,131
Financial liabilities, fair value 508  
Level 2 | Current financial liabilities - derivatives    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial liabilities, fair value 20  
Level 2 | Non-current financial liabilities - derivatives    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial liabilities, fair value 488  
Level 3    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets, fair value 3,618 339
Cash and Cash Equivalents    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets, fair value 69,602 228,740
Cash and Cash Equivalents | Level 1    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets, fair value 69,602 228,740
Financial Assets - Investments FVTPL - Traded    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets, fair value 240 443
Financial Assets - Investments FVTPL - Traded | Level 1    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets, fair value 240 443
Financial Assets - Investments FVTPL - Not Traded    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets, fair value 436 339
Financial Assets - Investments FVTPL - Not Traded | Level 3    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets, fair value 436 339
Non-current financial assets - derivatives    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets, fair value 577 5,694
Non-current financial assets - derivatives | Level 2    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets, fair value 577 5,694
Current financial assets - derivatives    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets, fair value 3,633 2,795
Current financial assets - derivatives | Level 2    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets, fair value 3,633 2,795
Other Current Financial Assets    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets, fair value 749  
Other Current Financial Assets | Level 2    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets, fair value 749  
Other Non-Current Financial Assets    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets, fair value   733
Other Non-Current Financial Assets | Level 2    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets, fair value   733
Other non current secured notes at FVTPL    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets, fair value 3,182  
Other non current secured notes at FVTPL | Level 3    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets, fair value € 3,182  
Life Insurance Policies    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets, fair value   27,908
Life Insurance Policies | Level 2    
Disclosure Of Fair Value Measurement Of Assets [Line Items]    
Financial assets, fair value   € 27,908