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Related Parties and Information about Significant Non-Recurring Events and A tipycal/Unusual Transactions - Schedule of Compensation of Key Management Personnel of the Group (Detail) - EUR (€)
€ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure of transactions between related parties [abstract]      
Directors' fee € 400 € 387 € 270
Short-term employee benefits 1,704 1,875 1,853
Social security contributions and defined contribution plans 563 500 500
Employee Benefit Obligations 118 110 133
Total € 2,785 € 2,872 € 2,756