Segment information and revenue from contracts with customers - Additional Information (Details) € in Thousands	12 Months Ended
Dec. 31, 2019 EUR (€) customer	Dec. 31, 2018 EUR (€) customer	Dec. 31, 2017 EUR (€) customer	Jan. 01, 2019 EUR (€)
Segment information and revenue from contracts with customers
Property, plant and equipment	€ 8,376	€ 39,115
Right-of-use assets	24,932			€ 5,767
Share issue related cost	1,092	0	€ 0
Real Estate Transfer Tax Expenses	1,200	0	0
Revenue from contracts with customers	48,780	40,478	31,689
Provision for expected credit losses on contract assets	8	2
Revenues recognized for contract liabilities	230	464
Aggregate amount of transaction price allocated to performance obligations	1,430	0
Later than one year and not later than three years
Segment information and revenue from contracts with customers
Aggregate amount of transaction price allocated to performance obligations	230
Later than three years
Segment information and revenue from contracts with customers
Aggregate amount of transaction price allocated to performance obligations	1,200
-United States
Segment information and revenue from contracts with customers
Property, plant and equipment	286	718
Right-of-use assets	1,042	0
Revenue from contracts with customers	€ 22,778	€ 17,296	€ 13,482
Pharmaceutical Partner
Segment information and revenue from contracts with customers
Number of customer in group \| customer	1	1	1
Revenue contributed by one pharmaceutical partner, as a percentage of Group's total revenues	24.30%	27.30%	37.70%
Revenue from contracts with customers	€ 1,930	€ 4,000	€ 0

It represents the number of customer in group.

No definition available.

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- Definition

The amount of provision for expected credit losses on contract assets, recognised by the company.

+ References

No definition available.

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- Definition

The amount represents the real estate transfer tax expenses.

+ References

No definition available.

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

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- Definition

The percentage of the entity's revenue. [Refer: Revenue]

+ References

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

The amount of tangible assets that: (a) are held for use in the production or supply of goods or services, for rental to others, or for administrative purposes; and (b) are expected to be used during more than one period.

+ References

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

The amount of revenue from contracts with customers. A customer is a party that has contracted with an entity to obtain goods or services that are an output of the entity’s ordinary activities in exchange for consideration.

+ References

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

The amount of revenue that was included in the contract liability balance at the beginning of the period. [Refer: Contract liabilities; Revenue from contracts with customers]

+ References

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

The amount of assets that represent a lessee's right to use an underlying asset for the lease term. Underlying asset is an asset that is the subject of a lease, for which the right to use that asset has been provided by a lessor to a lessee.

+ References

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

The amount of cost related to the issuance of shares.

+ References

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-Name IAS
-Number 1
-IssueDate 2019-01-01
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- Definition

The amount of the transaction price allocated to the performance obligations that are unsatisfied (or partially unsatisfied) as of the end of the reporting period. The transaction price is the amount of consideration to which an entity expects to be entitled in exchange for transferring promised goods or services to a customer, excluding amounts collected on behalf of third parties (for example, some sales taxes). [Refer: Performance obligations [member]]

+ References

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