Other income (Details) - EUR (€) € in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Other income
Grant income	€ 518	€ 2,835
Other income	12	123
Total other income	€ 530	€ 2,958	€ 1,509	€ 4,428

The amount of operating income that the entity does not separately disclose in the same statement or note.

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