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Critical Accounting Judgments and Key Sources of Estimation Uncertainty - Additional Information (Detail) - EUR (€)	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Disclosure of changes in accounting estimates [line items]
Impairment loss	€ 0	€ 0
Bottom of range [member]
Disclosure of changes in accounting estimates [line items]
Optional Lease Extension Period	1 year
Top of range [member]
Disclosure of changes in accounting estimates [line items]
Optional Lease Extension Period	6 years
EUR or Danish Kroner [member]
Disclosure of changes in accounting estimates [line items]
Percentage borrowings denominated in rate	2.50%
US Dollars [member] | Bottom of range [member]
Disclosure of changes in accounting estimates [line items]
Percentage borrowings denominated in rate	4.25%
US Dollars [member] | Top of range [member]
Disclosure of changes in accounting estimates [line items]
Percentage borrowings denominated in rate	5.00%

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2018-01-01
-Paragraph B67
-Subparagraph d
-Clause v
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2018-03-01&anchor=para_B67_d_v&doctype=Appendix&seq=2
-URIDate 2018-03-16

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