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Other current liabilities - Summary of other current liabilities (Detail) - EUR (€) € in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Disclosure of detailed information about other current liabilities [Line Items] |  |  |
Payroll tax | € 1,185 | € 727 |
Accrual for vacation | 525 | 330 |
Deferred grant income | 0 | 164 |
Accrued bonuses | 154 | 52 |
Other | 161 | 15 |
Total | € 2,025 | € 1,288 | [1]
[1] | See Note 2 for details regarding the change in presentation of Other financial assets

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