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Trade Receivables - Summary of Trade Receivables by Geographic Region (Detail) - EUR (€)
€ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Total trade receivables, net € 33,304 € 39,056
Gross carrying amount [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Total trade receivables, net 37,567 44,660
Gross carrying amount [member] | Italian Customers [Member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Total trade receivables, net 8,349 10,124
Gross carrying amount [member] | Other European Customers    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Total trade receivables, net 6,553 10,761
Gross carrying amount [member] | North American customers [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Total trade receivables, net 9,182 8,233
Gross carrying amount [member] | Chinese customers [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Total trade receivables, net 4,347 5,589
Gross carrying amount [member] | South American customers [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Total trade receivables, net 5,447 5,047
Gross carrying amount [member] | Other foreign customers [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Total trade receivables, net 3,689 4,906
Provision for doubtful accounts [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Total trade receivables, net € (4,263) € (5,604)