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Administrative Expenses - Summary of Administrative Expenses (Detail) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Selling General And Administrative Expense [Abstract]
Labour costs	€ 17,342	€ 15,578	€ 19,060
Professional services costs	3,690	4,409	4,761
Indirect taxes	3,617	2,354	2,261
Depreciation and amortization	1,657	1,580	1,585
Office and software maintainance	1,784	1,502	1,385
Travel expenses	1,388	868	2,226
Directors and audit committee fees	1,868	736	831
Mail and Phone	519	523	622
Printing and Stationery	354	278	381
Government grants related to PPE	(54)	(49)	(163)
Other	1,137	1,665	1,077
Total	€ 33,302	€ 29,444	€ 34,026

X

- Definition

The amount of expense arising from communication.

+ References

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X

- Definition

The amount of expense relating to general and administrative activities of the entity.

+ References

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X

- Definition

The amount of fees paid or payable for professional services.

+ References

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

- References

No definition available.

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X

- Definition

The amount of tax expense exclusive of income tax expense.

+ References

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

- Definition

The amount of expense arising from travel.

+ References

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X

- Definition

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

+ References

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- Definition

Directors and audit committee fees.

+ References

No definition available.

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X

- Definition

General and administrative depreciation and amortization expense.

+ References

No definition available.

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- Definition

Government grants expenses.

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No definition available.

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X

- Definition

Other General And Administrative Expenses

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No definition available.

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X

- Definition

Printing stationery expense.

+ References

No definition available.

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X

- Definition

Software and office maintenance expenses.

+ References

No definition available.

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