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Revenue from collaboration agreements - Summary of Deferred revenue related to the collaboration agreements (Detail) - EUR (€)
€ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Revenue [abstract]    
Current € 46,600 € 59,465 [1]
Non-current 85,475 101,909 [1]
Total € 132,075 € 161,374
[1] See Note 2 for details regarding the change in presentation of Other financial assets