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Share-based payments - Schedule of Changes in Share Options (Details) |  |  |  |  |  |  |  |  |  |  |  |  |  | 6 Months Ended
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Jun. 30, 2025 shares | May 23, 2024 shares benefeciary € / shares | Jul. 20, 2023 shares benefeciary € / shares | Jun. 22, 2022 shares benefeciary € / shares | Jun. 21, 2021 shares € / shares | Apr. 20, 2021 shares benefeciary € / shares | Mar. 11, 2020 shares benefeciary € / shares | Oct. 24, 2019 shares € / shares | Mar. 29, 2019 shares benefeciary € / shares | Mar. 06, 2018 shares benefeciary € / shares | Jan. 07, 2017 shares benefeciary € / shares | Nov. 03, 2016 shares benefeciary € / shares | Feb. 02, 2016 shares benefeciary € / shares | Jun. 30, 2025 shares € / shares
OSA 2016-1 P |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options authorised (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 450,000 |
Total number of share options granted (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 6,400 |
Total number of shares to which the share options were likely to give right (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 6,400 |
Exercise price (in euros per share) | € / shares |  |  |  |  |  |  |  |  |  |  |  |  | € 13.05 |
Number of shares subscribed (in shares) | 0 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options lapsed or cancelled (in shares) | 6,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options outstanding (in shares) | 400 |  |  |  |  |  |  |  |  |  |  |  |  | 400
Maximum number of shares available for subscription (in shares) | 400 |  |  |  |  |  |  |  |  |  |  |  |  | 400
Maximum total number of shares that may be subscribed (in shares) | 400 |  |  |  |  |  |  |  |  |  |  |  |  | 400
OSA 2016-1 P | Beneficiaries other than corporate officers |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of beneficiaries who are not corporate officers | benefeciary |  |  |  |  |  |  |  |  |  |  |  |  | 2 |
OSA 2016-2 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options authorised (in shares) |  |  |  |  |  |  |  |  |  |  |  | 450,000 |  |
Total number of share options granted (in shares) |  |  |  |  |  |  |  |  |  |  |  | 4,000 |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  |  |  |  |  |  |  |  |  |  | 4,000 |  |
Exercise price (in euros per share) | € / shares |  |  |  |  |  |  |  |  |  |  |  | € 14.26 |  |
Number of shares subscribed (in shares) | 0 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options lapsed or cancelled (in shares) | 0 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options outstanding (in shares) | 4,000 |  |  |  |  |  |  |  |  |  |  |  |  | 4,000
Maximum number of shares available for subscription (in shares) | 4,000 |  |  |  |  |  |  |  |  |  |  |  |  | 4,000
Maximum total number of shares that may be subscribed (in shares) | 4,000 |  |  |  |  |  |  |  |  |  |  |  |  | 4,000
OSA 2016-2 | Beneficiaries other than corporate officers |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of beneficiaries who are not corporate officers | benefeciary |  |  |  |  |  |  |  |  |  |  |  | 1 |  |
OSA 2017 O |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options authorised (in shares) |  |  |  |  |  |  |  |  |  |  | 450,000 |  |  |
Total number of share options granted (in shares) |  |  |  |  |  |  |  |  |  |  | 3,500 |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  |  |  |  |  |  |  |  |  | 3,500 |  |  |
Exercise price (in euros per share) | € / shares |  |  |  |  |  |  |  |  |  |  | € 14.97 |  |  |
Number of shares subscribed (in shares) | 0 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options lapsed or cancelled (in shares) | 3,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options outstanding (in shares) | 500 |  |  |  |  |  |  |  |  |  |  |  |  | 500
Maximum number of shares available for subscription (in shares) | 500 |  |  |  |  |  |  |  |  |  |  |  |  | 500
Maximum total number of shares that may be subscribed (in shares) | 500 |  |  |  |  |  |  |  |  |  |  |  |  | 500
OSA 2017 O | Beneficiaries other than corporate officers |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of beneficiaries who are not corporate officers | benefeciary |  |  |  |  |  |  |  |  |  |  | 2 |  |  |
OSA 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options authorised (in shares) |  |  |  |  |  |  |  |  |  | 526,800 |  |  |  |
Total number of share options granted (in shares) |  |  |  |  |  |  |  |  |  | 62,000 |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  |  |  |  |  |  |  |  | 62,000 |  |  |  |
Exercise price (in euros per share) | € / shares |  |  |  |  |  |  |  |  |  | € 12.87 |  |  |  |
Number of shares subscribed (in shares) | 0 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options lapsed or cancelled (in shares) | 12,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options outstanding (in shares) | 50,000 |  |  |  |  |  |  |  |  |  |  |  |  | 50,000
Maximum number of shares available for subscription (in shares) | 50,000 |  |  |  |  |  |  |  |  |  |  |  |  | 50,000
Maximum total number of shares that may be subscribed (in shares) | 50,000 |  |  |  |  |  |  |  |  |  |  |  |  | 50,000
OSA 2018 | Beneficiaries other than corporate officers |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of beneficiaries who are not corporate officers | benefeciary |  |  |  |  |  |  |  |  |  | 5 |  |  |  |
OSA 2019-1 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options authorised (in shares) |  |  |  |  |  |  |  |  | 648,000 |  |  |  |  |
Total number of share options granted (in shares) |  |  |  |  |  |  |  |  | 37,500 |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  |  |  |  |  |  |  | 37,500 |  |  |  |  |
Exercise price (in euros per share) | € / shares |  |  |  |  |  |  |  |  | € 11.08 |  |  |  |  |
Number of shares subscribed (in shares) | 0 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options lapsed or cancelled (in shares) | 12,750 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options outstanding (in shares) | 24,750 |  |  |  |  |  |  |  |  |  |  |  |  | 24,750
Maximum number of shares available for subscription (in shares) | 24,750 |  |  |  |  |  |  |  |  |  |  |  |  | 24,750
Maximum total number of shares that may be subscribed (in shares) | 24,750 |  |  |  |  |  |  |  |  |  |  |  |  | 24,750
OSA 2019-1 | Beneficiaries other than corporate officers |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of beneficiaries who are not corporate officers | benefeciary |  |  |  |  |  |  |  |  | 12 |  |  |  |  |
OSA 2019 LLY |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options authorised (in shares) |  |  |  |  |  |  |  | 500,000 |  |  |  |  |  |
Total number of share options granted (in shares) |  |  |  |  |  |  |  | 500,000 |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  |  |  |  |  |  | 500,000 |  |  |  |  |  |
Exercise price (in euros per share) | € / shares |  |  |  |  |  |  |  | € 6.41 |  |  |  |  |  |
Number of shares subscribed (in shares) | 0 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options lapsed or cancelled (in shares) | 0 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options outstanding (in shares) | 500,000 |  |  |  |  |  |  |  |  |  |  |  |  | 500,000
Maximum number of shares available for subscription (in shares) | 0 |  |  |  |  |  |  |  |  |  |  |  |  | 0
Maximum total number of shares that may be subscribed (in shares) | 500,000 |  |  |  |  |  |  |  |  |  |  |  |  | 500,000
OSA 2019 LLY | Corporate officers |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  |  |  |  |  |  | 500,000 |  |  |  |  |  |
OSA 2019 LLY | Corporate officers | Laurent LEVY |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  |  |  |  |  |  | 500,000 |  |  |  |  |  |
OSA 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options authorised (in shares) |  |  |  |  |  |  | 500,000 |  |  |  |  |  |  |
Total number of share options granted (in shares) |  |  |  |  |  |  | 407,972 |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  |  |  |  |  | 407,972 |  |  |  |  |  |  |
Exercise price (in euros per share) | € / shares |  |  |  |  |  |  | € 6.25 |  |  |  |  |  |  |
Number of shares subscribed (in shares) | 0 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options lapsed or cancelled (in shares) | 47,265 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options outstanding (in shares) | 360,707 |  |  |  |  |  |  |  |  |  |  |  |  | 360,707
Maximum number of shares available for subscription (in shares) | 360,707 |  |  |  |  |  |  |  |  |  |  |  |  | 360,707
Maximum total number of shares that may be subscribed (in shares) | 360,707 |  |  |  |  |  |  |  |  |  |  |  |  | 360,707
OSA 2020 | Corporate officers |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  |  |  |  |  | 180,000 |  |  |  |  |  |  |
OSA 2020 | Corporate officers | Laurent LEVY |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  |  |  |  |  | 120,000 |  |  |  |  |  |  |
OSA 2020 | Corporate officers | Anne-Juliette HERMANT |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  |  |  |  |  | 60,000 |  |  |  |  |  |  |
OSA 2020 | Beneficiaries other than corporate officers |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of beneficiaries who are not corporate officers | benefeciary |  |  |  |  |  |  | 104 |  |  |  |  |  |  |
OSA 2021-04 O |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options authorised (in shares) |  |  |  |  |  | 850,000 |  |  |  |  |  |  |  |
Total number of share options granted (in shares) |  |  |  |  |  | 143,200 |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  |  |  |  | 143,200 |  |  |  |  |  |  |  |
Exercise price (in euros per share) | € / shares |  |  |  |  |  | € 13.74 |  |  |  |  |  |  |  |
Number of shares subscribed (in shares) | 0 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options lapsed or cancelled (in shares) | 104,668 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options outstanding (in shares) | 38,532 |  |  |  |  |  |  |  |  |  |  |  |  | 38,532
Maximum number of shares available for subscription (in shares) | 38,532 |  |  |  |  |  |  |  |  |  |  |  |  | 38,532
Maximum total number of shares that may be subscribed (in shares) | 38,532 |  |  |  |  |  |  |  |  |  |  |  |  | 38,532
OSA 2021-04 O | Beneficiaries other than corporate officers |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of beneficiaries who are not corporate officers | benefeciary |  |  |  |  |  | 13 |  |  |  |  |  |  |  |
OSA 2021-04 P |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options authorised (in shares) |  |  |  |  |  | 1,000,000 |  |  |  |  |  |  |  |
Total number of share options granted (in shares) |  |  |  |  |  | 428,000 |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  |  |  |  | 428,000 |  |  |  |  |  |  |  |
Exercise price (in euros per share) | € / shares |  |  |  |  |  | € 13.74 |  |  |  |  |  |  |  |
Number of shares subscribed (in shares) | 0 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options lapsed or cancelled (in shares) | 87,400 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options outstanding (in shares) | 340,600 |  |  |  |  |  |  |  |  |  |  |  |  | 340,600
Maximum total number of shares that may be subscribed (in shares) | 340,600 |  |  |  |  |  |  |  |  |  |  |  |  | 340,600
OSA 2021-04 P | Corporate officers |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  |  |  |  | 240,000 |  |  |  |  |  |  |  |
OSA 2021-04 P | Corporate officers | Laurent LEVY |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  |  |  |  | 180,000 |  |  |  |  |  |  |  |
OSA 2021-04 P | Corporate officers | Anne-Juliette HERMANT |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  |  |  |  | 60,000 |  |  |  |  |  |  |  |
OSA 2021-04 P | Beneficiaries other than corporate officers |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of beneficiaries who are not corporate officers | benefeciary |  |  |  |  |  | 14 |  |  |  |  |  |  |  |
OSA 2021-06 P |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options authorised (in shares) |  |  |  |  | 1,000,000 |  |  |  |  |  |  |  |  |
Total number of share options granted (in shares) |  |  |  |  | 60,000 |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  |  |  | 60,000 |  |  |  |  |  |  |  |  |
Exercise price (in euros per share) | € / shares |  |  |  |  | € 12.99 |  |  |  |  |  |  |  |  |
Number of shares subscribed (in shares) | 0 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options lapsed or cancelled (in shares) | 0 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options outstanding (in shares) | 60,000 |  |  |  |  |  |  |  |  |  |  |  |  | 60,000
Maximum total number of shares that may be subscribed (in shares) | 60,000 |  |  |  |  |  |  |  |  |  |  |  |  | 60,000
OSA 2021-06 P | Corporate officers |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  |  |  | 60,000 |  |  |  |  |  |  |  |  |
OSA 2021-06 P | Corporate officers | Bart VAN RHIJN |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  |  |  | 60,000 |  |  |  |  |  |  |  |  |
OSA 2021-06 O |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options authorised (in shares) |  |  |  |  | 850,000 |  |  |  |  |  |  |  |  |
Total number of share options granted (in shares) |  |  |  |  | 60,000 |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  |  |  | 60,000 |  |  |  |  |  |  |  |  |
Exercise price (in euros per share) | € / shares |  |  |  |  | € 12.99 |  |  |  |  |  |  |  |  |
Number of shares subscribed (in shares) | 0 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options lapsed or cancelled (in shares) | 0 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options outstanding (in shares) | 60,000 |  |  |  |  |  |  |  |  |  |  |  |  | 60,000
Maximum number of shares available for subscription (in shares) | 60,000 |  |  |  |  |  |  |  |  |  |  |  |  | 60,000
Maximum total number of shares that may be subscribed (in shares) | 60,000 |  |  |  |  |  |  |  |  |  |  |  |  | 60,000
OSA 2021-06 O | Corporate officers |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  |  |  | 60,000 |  |  |  |  |  |  |  |  |
OSA 2021-06 O | Corporate officers | Bart VAN RHIJN |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  |  |  | 60,000 |  |  |  |  |  |  |  |  |
OSA 2022-06 P |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options authorised (in shares) |  |  |  | 1,000,000 |  |  |  |  |  |  |  |  |  |
Total number of share options granted (in shares) |  |  |  | 170,400 |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  |  | 170,400 |  |  |  |  |  |  |  |  |  |
Exercise price (in euros per share) | € / shares |  |  |  | € 4.16 |  |  |  |  |  |  |  |  |  |
Number of shares subscribed (in shares) | 0 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options lapsed or cancelled (in shares) | 46,620 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options outstanding (in shares) | 123,780 |  |  |  |  |  |  |  |  |  |  |  |  | 123,780
Maximum total number of shares that may be subscribed (in shares) | 123,780 |  |  |  |  |  |  |  |  |  |  |  |  | 123,780
OSA 2022-06 P | Beneficiaries other than corporate officers |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of beneficiaries who are not corporate officers | benefeciary |  |  |  | 83 |  |  |  |  |  |  |  |  |  |
OSA 2022-06 O |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options authorised (in shares) |  |  |  | 850,000 |  |  |  |  |  |  |  |  |  |
Total number of share options granted (in shares) |  |  |  | 410,500 |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  |  | 410,500 |  |  |  |  |  |  |  |  |  |
Exercise price (in euros per share) | € / shares |  |  |  | € 4.16 |  |  |  |  |  |  |  |  |  |
Number of shares subscribed (in shares) | 0 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options lapsed or cancelled (in shares) | 30,500 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options outstanding (in shares) | 380,000 |  |  |  |  |  |  |  |  |  |  |  |  | 380,000
Maximum number of shares available for subscription (in shares) | 380,000 |  |  |  |  |  |  |  |  |  |  |  |  | 380,000
Maximum total number of shares that may be subscribed (in shares) | 380,000 |  |  |  |  |  |  |  |  |  |  |  |  | 380,000
OSA 2022-06 O | Corporate officers |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  |  | 245,000 |  |  |  |  |  |  |  |  |  |
OSA 2022-06 O | Corporate officers | Laurent LEVY |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  |  | 150,000 |  |  |  |  |  |  |  |  |  |
OSA 2022-06 O | Corporate officers | Anne-Juliette HERMANT |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  |  | 35,000 |  |  |  |  |  |  |  |  |  |
OSA 2022-06 O | Corporate officers | Bart VAN RHIJN |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  |  | 60,000 |  |  |  |  |  |  |  |  |  |
OSA 2022-06 O | Beneficiaries other than corporate officers |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of beneficiaries who are not corporate officers | benefeciary |  |  |  | 49 |  |  |  |  |  |  |  |  |  |
OSA 2023-01 O |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options authorised (in shares) |  |  | 1,700,000 |  |  |  |  |  |  |  |  |  |  |
Total number of share options granted (in shares) |  |  | 338,860 |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  | 338,860 |  |  |  |  |  |  |  |  |  |  |
Exercise price (in euros per share) | € / shares |  |  | € 5.00 |  | € 5.00 |  |  |  |  |  |  |  |  |
Number of shares subscribed (in shares) | 0 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options lapsed or cancelled (in shares) | 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options outstanding (in shares) | 318,860 |  |  |  |  |  |  |  |  |  |  |  |  | 318,860
Maximum number of shares available for subscription (in shares) | 106,288 |  |  |  |  |  |  |  |  |  |  |  |  | 106,288
Maximum total number of shares that may be subscribed (in shares) | 318,860 |  |  |  |  |  |  |  |  |  |  |  |  | 318,860
OSA 2023-01 O | Corporate officers |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  | 298,860 |  |  |  |  |  |  |  |  |  |  |
OSA 2023-01 O | Corporate officers | Laurent LEVY |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  | 200,116 |  |  |  |  |  |  |  |  |  |  |
OSA 2023-01 O | Corporate officers | Anne-Juliette HERMANT |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  | 33,354 |  |  |  |  |  |  |  |  |  |  |
OSA 2023-01 O | Corporate officers | Bart VAN RHIJN |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  | 65,390 |  |  |  |  |  |  |  |  |  |  |
OSA 2023-01 O | Beneficiaries other than corporate officers |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of beneficiaries who are not corporate officers | benefeciary |  |  | 2 |  |  |  |  |  |  |  |  |  |  |
OSA 2024-01 O |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options authorised (in shares) |  | 1,700,000 |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options granted (in shares) |  | 1,224,780 |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  | 1,224,780 |  |  |  |  |  |  |  |  |  |  |  |
Exercise price (in euros per share) | € / shares |  | € 5.81 |  |  | € 5.81 |  |  |  |  |  |  |  |  |
Number of shares subscribed (in shares) | 0 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options lapsed or cancelled (in shares) | 5,250 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options outstanding (in shares) | 1,219,530 |  |  |  |  |  |  |  |  |  |  |  |  | 1,219,530
Maximum number of shares available for subscription (in shares) | 406,510 |  |  |  |  |  |  |  |  |  |  |  |  | 406,510
Maximum total number of shares that may be subscribed (in shares) | 1,219,530 |  |  |  |  |  |  |  |  |  |  |  |  | 1,219,530
OSA 2024-01 O | Corporate officers |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  | 930,000 |  |  |  |  |  |  |  |  |  |  |  |
OSA 2024-01 O | Corporate officers | Laurent LEVY |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  | 500,000 |  |  |  |  |  |  |  |  |  |  |  |
OSA 2024-01 O | Corporate officers | Anne-Juliette HERMANT |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  | 90,000 |  |  |  |  |  |  |  |  |  |  |  |
OSA 2024-01 O | Corporate officers | Bart VAN RHIJN |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  | 180,000 |  |  |  |  |  |  |  |  |  |  |  |
OSA 2024-01 O | Corporate officers | Louis Kayitalire |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  | 160,000 |  |  |  |  |  |  |  |  |  |  |  |
OSA 2024-01 O | Beneficiaries other than corporate officers |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of beneficiaries who are not corporate officers | benefeciary |  | 107 |  |  |  |  |  |  |  |  |  |  |  |
OSA 2025-01 O |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options authorised (in shares) |  |  | 1,700,000 |  |  |  |  |  |  |  |  |  |  |
Total number of share options granted (in shares) |  |  | 8,000 |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  | 8,000 |  |  |  |  |  |  |  |  |  |  |
Exercise price (in euros per share) | € / shares |  |  | € 3.36 |  |  |  |  |  |  |  |  |  |  | € 3.36
Number of shares subscribed (in shares) | 0 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options lapsed or cancelled (in shares) | 0 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options outstanding (in shares) | 8,000 |  |  |  |  |  |  |  |  |  |  |  |  | 8,000
Maximum number of shares available for subscription (in shares) | 0 |  |  |  |  |  |  |  |  |  |  |  |  | 0
Maximum total number of shares that may be subscribed (in shares) | 8,000 |  |  |  |  |  |  |  |  |  |  |  |  | 8,000
OSA 2025-01 O | Corporate officers |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  | 0 |  |  |  |  |  |  |  |  |  |  |
OSA 2025-01 O | Corporate officers | Laurent LEVY |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  | 0 |  |  |  |  |  |  |  |  |  |  |
OSA 2025-01 O | Corporate officers | Anne-Juliette HERMANT |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  | 0 |  |  |  |  |  |  |  |  |  |  |
OSA 2025-01 O | Corporate officers | Bart VAN RHIJN |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  |  | 0 |  |  |  |  |  |  |  |  |  |  |
OSA 2025-01 O | Beneficiaries other than corporate officers |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of beneficiaries who are not corporate officers | benefeciary |  |  | 2 |  |  |  |  |  |  |  |  |  |  |
OSA 2025-02 O |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options authorised (in shares) |  | 1,700,000 |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options granted (in shares) |  | 1,241,005 |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  | 1,241,005 |  |  |  |  |  |  |  |  |  |  |  |
Exercise price (in euros per share) | € / shares |  | € 2.97 |  |  |  |  |  |  |  |  |  |  |  | € 2.97
Number of shares subscribed (in shares) | 0 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options lapsed or cancelled (in shares) | 1 |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of share options outstanding (in shares) | 1,241,004 |  |  |  |  |  |  |  |  |  |  |  |  | 1,241,004
Maximum number of shares available for subscription (in shares) | 0 |  |  |  |  |  |  |  |  |  |  |  |  | 0
Maximum total number of shares that may be subscribed (in shares) | 1,241,004 |  |  |  |  |  |  |  |  |  |  |  |  | 1,241,004
OSA 2025-02 O | Corporate officers |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  | 945,000 |  |  |  |  |  |  |  |  |  |  |  |
OSA 2025-02 O | Corporate officers | Laurent LEVY |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  | 505,000 |  |  |  |  |  |  |  |  |  |  |  |
OSA 2025-02 O | Corporate officers | Anne-Juliette HERMANT |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  | 100,000 |  |  |  |  |  |  |  |  |  |  |  |
OSA 2025-02 O | Corporate officers | Bart VAN RHIJN |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  | 190,000 |  |  |  |  |  |  |  |  |  |  |  |
OSA 2025-02 O | Corporate officers | Louis Kayitalire |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total number of shares to which the share options were likely to give right (in shares) |  | 150,000 |  |  |  |  |  |  |  |  |  |  |  |
OSA 2025-02 O | Beneficiaries other than corporate officers |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Detailed Information About Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of beneficiaries who are not corporate officers | benefeciary |  | 105 |  |  |  |  |  |  |  |  |  |  |  |

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