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Property, plant and equipment - Summary of Changes to property, plant and equipment (Detail) - EUR (€) € in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning Cost | [1] | € 4,720 |  |
Ending Cost |  | 7,868 | € 4,720 | [1]
Laboratory Equipment [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning Cost |  | 3,420 |  |
Ending Cost |  | 5,493 | 3,420 |
Computer equipment [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning Cost |  | 906 |  |
Ending Cost |  | 894 | 906 |
Office equipment [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning Cost |  | 394 |  |
Ending Cost |  | 1,481 | 394 |
Adjustment On Adoption IFRS 16 |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning Cost |  |  | (441) |
Gross carrying amount [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning Cost |  | 17,432 | 15,116 |
Additions |  | 5,379 | 3,016 |
Disposals |  | 7 | (316) |
Currency translation differences |  | 367 | 57 |
Ending Cost |  | 22,437 | 17,432 |
Gross carrying amount [member] | Laboratory Equipment [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning Cost |  | 12,723 | 11,222 |
Additions |  | 3,545 | 2,204 |
Disposals |  | 1 | (314) |
Currency translation differences |  | 299 | 52 |
Ending Cost |  | 15,968 | 12,723 |
Gross carrying amount [member] | Computer equipment [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning Cost |  | 2,956 | 2,439 |
Additions |  | 406 | 515 |
Disposals |  |  | (2) |
Currency translation differences |  | 40 | 4 |
Ending Cost |  | 3,322 | 2,956 |
Gross carrying amount [member] | Office equipment [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning Cost |  | 1,753 | 1,455 |
Additions |  | 1,427 | 297 |
Disposals |  | 6 |  |
Currency translation differences |  | 28 | 1 |
Ending Cost |  | 3,146 | 1,753 |
Gross carrying amount [member] | Previously stated [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning Cost |  |  | 14,675 |
Gross carrying amount [member] | Previously stated [member] | Laboratory Equipment [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning Cost |  |  | 10,781 |
Gross carrying amount [member] | Previously stated [member] | Computer equipment [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning Cost |  |  | 2,439 |
Gross carrying amount [member] | Previously stated [member] | Office equipment [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning Cost |  |  | 1,455 |
Gross carrying amount [member] | Adjustment On Adoption IFRS 16 | Laboratory Equipment [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning Cost |  |  | (441) |
Accumulated depreciation [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning Cost |  | (12,712) | (11,109) |
Additions |  | 2,102 | 1,797 |
Disposals |  | 7 | (219) |
Currency translation differences |  | 239 | 25 |
Ending Cost |  | (14,568) | (12,712) |
Accumulated depreciation [member] | Laboratory Equipment [Member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning Cost |  | (9,303) | (8,279) |
Additions |  | 1,384 | 1,219 |
Disposals |  | 1 | (218) |
Currency translation differences |  | 210 | 23 |
Ending Cost |  | (10,476) | (9,303) |
Accumulated depreciation [member] | Computer equipment [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning Cost |  | (2,050) | (1,793) |
Additions |  | 404 | 256 |
Disposals |  |  | (1) |
Currency translation differences |  | 26 | 2 |
Ending Cost |  | (2,428) | (2,050) |
Accumulated depreciation [member] | Office equipment [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning Cost |  | (1,359) | (1,037) |
Additions |  | 315 | 322 |
Disposals |  | 6 |  |
Currency translation differences |  | 3 |  |
Ending Cost |  | € (1,665) | € (1,359) |
[1] | See Note 2 for details regarding the change in presentation of Other financial assets

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- Definition The amount of tangible assets that: (a) are held for use in the production or supply of goods or services, for rental to others, or for administrative purposes; and (b) are expected to be used during more than one period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2020-01-01 -Paragraph 73 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2020-en-r&anchor=para_73_e&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 54 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_54_a&doctype=Standard -URIDate 2020-01-01 + Details
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