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Share-based payments - Summary of Employee Related Share Based Compensation Expense (Detail) - EUR (€) € in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disclosure Of Detailed Information About Share Based Compensation Expense [Line Items]
Share-based compensation expense	€ 5,560	€ 7,965	€ 11,262	€ 16,269
Research And Development Expense [Member]
Disclosure Of Detailed Information About Share Based Compensation Expense [Line Items]
Share-based compensation expense	3,107	4,676	6,375	9,574
General And Administrative Expense [Member]
Disclosure Of Detailed Information About Share Based Compensation Expense [Line Items]
Share-based compensation expense	€ 2,453	€ 3,289	€ 4,887	€ 6,695

X

- Definition

The amount of expense from share-based payment transactions with employees. [Refer: Expense from share-based payment transactions]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 112
-Subparagraph c
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-URIDate 2021-03-24

+ Details

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X

- Definition

Disclosure of detailed information about share based compensation expense [Line Items].

+ References

No definition available.

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- Details

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