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Intangible assets - Summary of Amortization expense (Detail) - EUR (€) € in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of detailed information about intangible assets [line items] |  |  |
Amortisation, intangible assets other than goodwill | € 126 | € 111 | € 118
Research and development expenses [Member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Amortisation, intangible assets other than goodwill | 31 | 28 | 9
General and administrative expenses [Member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Amortisation, intangible assets other than goodwill | € 95 | € 83 | € 109

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- Definition The amount of amortisation of intangible assets other than goodwill. [Refer: Depreciation and amortisation expense; Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2020-01-01 -Paragraph 118 -Subparagraph e -Clause vi -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2020-en-r&anchor=para_118_e_vi&doctype=Standard -URIDate 2020-01-01 + Details
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- 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. + Details
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- Details
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- Details
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