XML 203 R189.htm IDEA: XBRL DOCUMENT v3.21.1
Cost of Sales - Additional Information (Detail) - EUR (€)
€ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Other manufacturing costs [member] | Cost of sales [member]      
Disclosure Of Cost Of Sales [Line Items]      
Depreciation and amortisation € 10,136 € 11,709 € 7,455