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Operating Expenses - Summary of Personnel Expenses (Detail) - EUR (€) € in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Disclosure of personnel expense [abstract]
Wages and salaries	€ 25,332	€ 14,256
Social security contributions	7,138	4,556
Expenses for pension commitments	1,223	1,100
Employer contribution to bonus shares	455	906
Share-based payments	8,040	16,758
Total personnel expenses	€ 42,188	€ 37,577

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Employer contribution to bonus shares.

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Disclosure of personnel expense [abstract]

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- Definition

Expenses for pension commitments.

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Personnel expenses.

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No definition available.

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- Definition

Adjustments for share-based payments to reconcile profit (loss) to net cash flow from (used in) operating activities. [Refer: Profit (loss)]

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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A class of employee benefits expense that represents social security contributions. [Refer: Employee benefits expense]

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- Definition

A class of employee benefits expense that represents wages and salaries. [Refer: Employee benefits expense]

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