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Changes in Significant Accounting Policies - Additional Information (Detail) - EUR (€)			12 Months Ended
	Jan. 01, 2021	Jan. 01, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disclosure Of Redesignated Financial Assets And Liabilities [Line Items]
Lease incentives			€ 635,000	€ 1,515,000	€ 1,799,000
IFRS 16 [member]
Disclosure Of Redesignated Financial Assets And Liabilities [Line Items]
Impact on retained earnings	€ 0	€ 0
Lease incentives			€ 635,000	€ 1,515,000

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- Definition

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- Definition

The increase (decrease) in equity resulting from the appropriation of retained earnings. [Refer: Retained earnings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2022-03-24
-Paragraph 106
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