Finance income and finance costs (Details) - EUR (€) € in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Finance income and finance costs
Foreign exchange gain	€ 523	€ 1,369	€ 1,978
Interest and similar income	3,436	221	304
Finance income	3,959	1,590	2,282
Foreign exchange loss		1,145	1,406
Interest and similar expense	2,576	204	62
Other			49
Finance costs	€ 2,576	€ 1,349	€ 1,517

The amount of costs associated with financing activities of the entity.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

The amount of income associated with interest and other financing activities of the entity.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
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- Definition

The net gain arising from foreign exchange differences. [Refer: Foreign exchange gain (loss)]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-IssueDate 2019-01-01
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The net loss arising from foreign exchange differences. [Refer: Foreign exchange gain (loss)]

+ References

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- Definition

The amount of finance costs that the entity does not separately disclose in the same statement or note. [Refer: Finance costs]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- References

No definition available.

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The amount of interest income and similar income recognized during the period.

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No definition available.

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The amount of interest expense and similar expense recognized during the period.

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No definition available.

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