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Intangibles Assets and Goodwill - Additional Information (Detail) - EUR (€)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Jan. 31, 2017
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Impairment loss on intangible assets and goodwill	€ 0	€ 0
2017 Acquisitions [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Goodwill			€ 2,041,000
2016 Acquisitions [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Goodwill			€ 1,921,000

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

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- Definition

The amount recognised as of the business combination's acquisition date for goodwill. [Refer: Goodwill; Business combinations [member]]

+ References

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- Definition

The amount of impairment loss recognised in profit or loss for intangible assets and goodwill. [Refer: Impairment loss recognised in profit or loss; Intangible assets and goodwill]

+ References

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