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Share-based payment plans - Black-Scholes model (Details) | 12 Months Ended
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Dec. 31, 2025 Y € / shares
Share-based payment plans |
Return dividend | 0.00%
Plan 2023 (Mar 25) |
Share-based payment plans |
Return dividend | 0.00%
Expected volatility | 66.00%
Risk-free interest rate | 3.06%
Expected life | Y | 4.22
Exercise price (in EUR) | € 7.59
Stock price (in EUR) | 5.38
Fair value warrant | € 2.43
Plan 2023 (Nov 23) |
Share-based payment plans |
Return dividend | 0.00%
Expected volatility | 64.00%
Risk-free interest rate | 3.19%
Expected life | Y | 5.59
Exercise price (in EUR) | € 5.09
Stock price (in EUR) | 5.6
Fair value warrant | € 3.44
Plan 2023 (Oct 23) |
Share-based payment plans |
Return dividend | 0.00%
Expected volatility | 64.00%
Risk-free interest rate | 3.50%
Expected life | Y | 5.59
Exercise price (in EUR) | € 4.87
Stock price (in EUR) | 5.15
Fair value warrant | € 3.12
Plan 2015 (Sept 16) |
Share-based payment plans |
Return dividend | 0.00%
Expected volatility | 47.00%
Risk-free interest rate | 0.24%
Expected life | Y | 4.3
Exercise price (in EUR) | € 6.45
Stock price (in EUR) | 6.42
Fair value warrant | € 2.41
IPO 2015 (Nov) |
Share-based payment plans |
Return dividend | 0.00%
Expected volatility | 47.00%
Risk-free interest rate | 1.17%
Expected life | Y | 5.5
Exercise price (in EUR) | € 8.81
Stock price (in EUR) | 8.08
Fair value warrant | € 3.3
IPO 2014 (Nov) |
Share-based payment plans |
Return dividend | 0.00%
Expected volatility | 50.00%
Risk-free interest rate | 1.12%
Expected life | Y | 5.5
Exercise price (in EUR) | € 8.81
Stock price (in EUR) | 8.67
Fair value warrant | € 3.94
IPO 2014 (June) |
Share-based payment plans |
Return dividend | 0.00%
Expected volatility | 46.00%
Risk-free interest rate | 1.70%
Expected life | Y | 5.5
Exercise price (in EUR) | € 8.81
Stock price (in EUR) | 8.81
Fair value warrant | € 3.83

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- Definition The expected volatility of the share price used to calculate the fair value of the share options granted. Expected volatility is a measure of the amount by which a price is expected to fluctuate during a period. The measure of volatility used in option pricing models is the annualised standard deviation of the continuously compounded rates of return on the share over a period of time. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2025-01-01 -Paragraph 47 -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2025-en-r&anchor=para_47_a_i&doctype=Standard -URIDate 2025-03-27 + Details
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- Definition The option life of share options granted. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2025-01-01 -Paragraph 47 -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2025-en-r&anchor=para_47_a_i&doctype=Standard -URIDate 2025-03-27 + Details
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- Definition The implied yield currently available on zero-coupon government issues of the country in whose currency the exercise price for share options granted is expressed, with a remaining term equal to the expected term of the option being valued (based on the option's remaining contractual life and taking into account the effects of expected early exercise). [Refer: Government [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2025-01-01 -Paragraph 47 -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2025-en-r&anchor=para_47_a_i&doctype=Standard -URIDate 2025-03-27 + Details
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- Definition The exercise price of share options granted. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2025-01-01 -Paragraph 47 -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2025-en-r&anchor=para_47_a_i&doctype=Standard -URIDate 2025-03-27 + Details
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- Definition The percentage of an expected dividend used to calculate the fair value of share options granted. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2025-01-01 -Paragraph 47 -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2025-en-r&anchor=para_47_a_i&doctype=Standard -URIDate 2025-03-27 + Details
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- Definition The weighted average share price used as input to the option pricing model to calculate the fair value of share options granted. [Refer: Option pricing model [member]; Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2025-01-01 -Paragraph 47 -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2025-en-r&anchor=para_47_a_i&doctype=Standard -URIDate 2025-03-27 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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