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Material accounting policies - Significant accounting judgements, estimates and assumptions (Details) - EUR (€) € in Thousands | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2021 | Dec. 31, 2022 | Dec. 31, 2019 | Jan. 31, 2019 | Dec. 31, 2018
Material accounting policies |  |  |  |  |  |  |  |
Receivables related to tax credits | € 5,767 | € 5,544 | € 5,281 |  |  |  |  |
Goodwill | 43,161 | 43,391 | 43,158 |  | € 44,155 |  |  |
Impairment charges on goodwill | 0 | 0 | 4,228 |  |  |  |  |
AM Flow fair value | 0 |  | 0 |  | € 0 |  |  |
Convertible loan |  |  |  |  |  |  |  |
Material accounting policies |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  | € 2,500 |
Financial assets | € 0 |  |  |  |  |  |  |
Fluidda - Maturity years | 7 years |  |  |  |  |  |  |
Fluidda - Interest rate | 10.00% |  |  |  |  |  |  |
Investment in essentium shares |  |  |  |  |  |  |  |
Material accounting policies |  |  |  |  |  |  |  |
Financial assets |  |  |  |  |  | € 3,300 |  | € 3,300
Essentium fair value |  |  |  | € 0 |  |  |  |
Fair value adjustment in equity investment |  |  |  | € 3,443 |  |  |  |
Capitalized development expenses |  |  |  |  |  |  |  |
Material accounting policies |  |  |  |  |  |  |  |
Capitalized development expenses | € 1,296 | € 1,375 | € 1,577 |  |  |  |  |

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- Definition The excess of amount paid for current tax in respect of current and prior periods over the amount due for those periods. Current tax is the amount of income taxes payable (recoverable) in respect of the taxable profit (tax loss) for a period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2027-01-01 -Name IAS -Number 1 -IssueDate 2025-01-01 -Paragraph 54 -Subparagraph n -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_54_n&doctype=Standard -URIDate 2025-03-27 + Details
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