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v3.19.1

Income Tax Expense - Summary of Deferred Tax Assets and Liabilities (Detail) - EUR (€) € in Thousands | Dec. 31, 2018 | Dec. 31, 2017 | Jan. 01, 2017
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Deferred Tax Assets And Liabilities [line items] |  |  |
Total deferred tax assets | € 2,027 | € 2,656 | € 2,557
Deferred tax liabilities | (42) | (320) | (1,763)
Total deferred tax liabilities | (1,594) | (2,350) | (3,174)
Intercompany profit on inventory [member] |  |  |
Deferred Tax Assets And Liabilities [line items] |  |  |
Deferred tax assets | 1,162 | 885 | 344
Provision for contingent liabilities [member] |  |  |
Deferred Tax Assets And Liabilities [line items] |  |  |
Deferred tax assets | 621 | 314 | 506
Inventories obsolescence [member] |  |  |
Deferred Tax Assets And Liabilities [line items] |  |  |
Deferred tax assets | 152 | 166 |
Deferred revenues and costs IFRS 15 [member] |  |  |
Deferred Tax Assets And Liabilities [line items] |  |  |
Deferred tax assets |  | 759 | 459
Deferred tax liabilities | (716) | (989) | (413)
Tax loss carry forwards [member] |  |  |
Deferred Tax Assets And Liabilities [line items] |  |  |
Deferred tax assets |  | 172 | 852
Other temporary differences [member] |  |  |
Deferred Tax Assets And Liabilities [line items] |  |  |
Deferred tax assets | 92 | 360 | 396
Deferred tax liabilities | (143) | (90) | (43)
Unrealised net gains on foreign exchange [member] |  |  |
Deferred Tax Assets And Liabilities [line items] |  |  |
Deferred tax liabilities | € (735) | € (1,271) | (998)
Withholding tax on unremitted earnings of subsidiaries [member] |  |  |
Deferred Tax Assets And Liabilities [line items] |  |  |
Deferred tax liabilities |  |  | € (1,720)

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