XML 124 R88.htm IDEA: XBRL DOCUMENT v3.21.2
Other income - Summary of other income (Detail) - EUR (€)
€ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Disclosure of Other income [Abstract]    
Receivables € 875 € 998
Deferred income 0 164
Total € 875 € 1,162