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Financial Instruments - Fair Values and Risk Management - Summary of Insured and Non-insured Trade Receivables (Detail) - EUR (€)
€ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Disclosure of detailed information about financial instruments [line items]    
Trade receivables € 33,304 € 39,056
Gross carrying amount [member]    
Disclosure of detailed information about financial instruments [line items]    
Trade receivables 37,567 44,660
Gross carrying amount [member] | Insured trade receivables [member]    
Disclosure of detailed information about financial instruments [line items]    
Trade receivables 25,706 25,624
Gross carrying amount [member] | Non-insured trade receivables [member]    
Disclosure of detailed information about financial instruments [line items]    
Trade receivables 11,861 19,036
Provision for doubtful accounts [member]    
Disclosure of detailed information about financial instruments [line items]    
Trade receivables € (4,263) € (5,604)