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Share-based payments - Disclosure of Indirect Measurement of Fair Value of Goods or Services Received, Founders' Warrants, Warrants, and Free Shares Granted During Period (Details) € / shares in Units, € in Thousands |  |  |  |  |  |  |  |  |  |  |  |  | 12 Months Ended |
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Jun. 22, 2022 EUR (€) € / shares | Apr. 20, 2021 EUR (€) € / shares | Mar. 17, 2020 EUR (€) € / shares | Mar. 11, 2020 EUR (€) € / shares | Mar. 29, 2019 EUR (€) € / shares | Jul. 27, 2018 EUR (€) € / shares | Jan. 07, 2017 EUR (€) € / shares | Feb. 02, 2016 EUR (€) € / shares | Jun. 25, 2015 EUR (€) € / shares | Jun. 10, 2015 EUR (€) € / shares | Feb. 10, 2015 EUR (€) € / shares | Sep. 16, 2014 EUR (€) € / shares | Dec. 31, 2024 EUR (€) shares | Dec. 31, 2023 EUR (€) shares | Dec. 31, 2022 EUR (€) shares | Dec. 31, 2024 uSDollarPerEuro
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of awards outstanding (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  | 4,936,540 | 4,172,089 | 3,513,246 |
Expense for the year |  |  |  |  |  |  |  |  |  |  |  |  | € 4,298 | € 3,222 | € 3,173 |
BSPCE |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of awards outstanding (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  | 467,067 | 557,367 | 614,726 |
Expense for the year |  |  |  |  |  |  |  |  |  |  |  |  | € 0 | € 18 | € 28 |
BSPCE 09-2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of awards outstanding (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 85,750 | 86,150 |
Share price (in euros) | € / shares |  |  |  |  |  |  |  |  |  |  |  | € 18.68 |  |  |  |
Exercise price (in euro per share) | € / shares |  |  |  |  |  |  |  |  |  |  |  | € 18.68 |  |  |  |
Volatility |  |  |  |  |  |  |  |  |  |  |  | 58.00% |  |  |  |
Risk-free rate |  |  |  |  |  |  |  |  |  |  |  | 0.64% |  |  |  |
Yield |  |  |  |  |  |  |  |  |  |  |  | 0.00% |  |  |  |
Value of initial plan (in thousands of euros) |  |  |  |  |  |  |  |  |  |  |  | € 965 |  |  |  |
Expense for the year |  |  |  |  |  |  |  |  |  |  |  |  | € 0 | € 0 | € 0 |
BSPCE 09-2014 | Tranche one |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity (in years) |  |  |  |  |  |  |  |  |  |  |  | 5 years 6 months |  |  |  |
BSPCE 09-2014 | Tranche two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity (in years) |  |  |  |  |  |  |  |  |  |  |  | 6 years |  |  |  |
BSPCE 09-2014 | Tranche three |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity (in years) |  |  |  |  |  |  |  |  |  |  |  | 6 years 6 months |  |  |  |
BSPCE 2015-1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of awards outstanding (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  | 67,750 | 68,100 | 68,450 |
Share price (in euros) | € / shares |  |  |  |  |  |  |  |  |  |  | € 18.57 |  |  |  |  |
Exercise price (in euro per share) | € / shares |  |  |  |  |  |  |  |  |  |  | € 18.57 |  |  |  |  |
Risk-free rate |  |  |  |  |  |  |  |  |  |  | 0.39% |  |  |  |  |
Yield |  |  |  |  |  |  |  |  |  |  | 0.00% |  |  |  |  |
Value of initial plan (in thousands of euros) |  |  |  |  |  |  |  |  |  |  | € 50 |  |  |  |  |
Expense for the year |  |  |  |  |  |  |  |  |  |  |  |  | € 0 | € 0 | € 0 |
BSPCE 2015-1 | Tranche one |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Volatility |  |  |  |  |  |  |  |  |  |  | 58.00% |  |  |  |  |
BSPCE 2015-1 | Tranche two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Volatility |  |  |  |  |  |  |  |  |  |  | 62.00% |  |  |  |  |
BSPCE 2015-1 | Tranche three |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Volatility |  |  |  |  |  |  |  |  |  |  | 61.00% |  |  |  |  |
BSPCE 2015-1 | Tranche one |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity (in years) |  |  |  |  |  |  |  |  |  |  | 5 years 6 months |  |  |  |  |
BSPCE 2015-1 | Tranche two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity (in years) |  |  |  |  |  |  |  |  |  |  | 6 years |  |  |  |  |
BSPCE 2015-1 | Tranche three |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity (in years) |  |  |  |  |  |  |  |  |  |  | 6 years 6 months |  |  |  |  |
BSPCE 2015-3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of awards outstanding (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  | 27,350 | 28,400 | 30,350 |
Share price (in euros) | € / shares |  |  |  |  |  |  |  |  |  | € 20.28 |  |  |  |  |  |
Exercise price (in euro per share) | € / shares |  |  |  |  |  |  |  |  |  | € 20.28 |  |  |  |  |  |
Risk-free rate |  |  |  |  |  |  |  |  |  | 0.56% |  |  |  |  |  |
Yield |  |  |  |  |  |  |  |  |  | 0.00% |  |  |  |  |  |
Value of initial plan (in thousands of euros) |  |  |  |  |  |  |  |  |  | € 483 |  |  |  |  |  |
Expense for the year |  |  |  |  |  |  |  |  |  |  |  |  | € 0 | € 0 | € 0 |
BSPCE 2015-3 | Tranche one |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Volatility |  |  |  |  |  |  |  |  |  | 61.00% |  |  |  |  |  |
BSPCE 2015-3 | Tranche two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Volatility |  |  |  |  |  |  |  |  |  | 62.00% |  |  |  |  |  |
BSPCE 2015-3 | Tranche three |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Volatility |  |  |  |  |  |  |  |  |  | 61.00% |  |  |  |  |  |
BSPCE 2015-3 | Tranche one |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity (in years) |  |  |  |  |  |  |  |  |  | 5 years 6 months |  |  |  |  |  |
BSPCE 2015-3 | Tranche two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity (in years) |  |  |  |  |  |  |  |  |  | 6 years |  |  |  |  |  |
BSPCE 2015-3 | Tranche three |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity (in years) |  |  |  |  |  |  |  |  |  | 6 years 6 months |  |  |  |  |  |
BSPCE 2016 Ordinary |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of awards outstanding (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  | 96,817 |  |  |
Share price (in euros) | € / shares |  |  |  |  |  |  |  | € 14.46 |  |  |  |  |  |  |  |
Exercise price (in euro per share) | € / shares |  |  |  |  |  |  |  | € 14.46 |  |  |  |  |  |  |  |
Risk-free rate |  |  |  |  |  |  |  | 0.32% |  |  |  |  |  |  |  |
Yield |  |  |  |  |  |  |  | 0.00% |  |  |  |  |  |  |  |
Value of initial plan (in thousands of euros) |  |  |  |  |  |  |  | € 1,080 |  |  |  |  |  |  |  |
Expense for the year |  |  |  |  |  |  |  |  |  |  |  |  | € 0 | 0 | 0 |
BSPCE 2016 Ordinary | Tranche one |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Volatility |  |  |  |  |  |  |  | 59.00% |  |  |  |  |  |  |  |
BSPCE 2016 Ordinary | Tranche two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Volatility |  |  |  |  |  |  |  | 62.00% |  |  |  |  |  |  |  |
BSPCE 2016 Ordinary | Tranche three |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Volatility |  |  |  |  |  |  |  | 60.00% |  |  |  |  |  |  |  |
BSPCE 2016 Ordinary | Tranche one |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity (in years) |  |  |  |  |  |  |  | 5 years 6 months |  |  |  |  |  |  |  |
BSPCE 2016 Ordinary | Tranche two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity (in years) |  |  |  |  |  |  |  | 6 years |  |  |  |  |  |  |  |
BSPCE 2016 Ordinary | Tranche three |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity (in years) |  |  |  |  |  |  |  | 6 years 6 months |  |  |  |  |  |  |  |
BSPCE 2016 Performance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of awards outstanding (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  | 98,100 |  |  |
Share price (in euros) | € / shares |  |  |  |  |  |  |  | € 14.46 |  |  |  |  |  |  |  |
Exercise price (in euro per share) | € / shares |  |  |  |  |  |  |  | € 14.46 |  |  |  |  |  |  |  |
Volatility |  |  |  |  |  |  |  | 59.00% |  |  |  |  |  |  |  |
Maturity (in years) |  |  |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |
Risk-free rate |  |  |  |  |  |  |  | 0.19% |  |  |  |  |  |  |  |
Yield |  |  |  |  |  |  |  | 0.00% |  |  |  |  |  |  |  |
Value of initial plan (in thousands of euros) |  |  |  |  |  |  |  | € 1,212 |  |  |  |  |  |  |  |
Expense for the year |  |  |  |  |  |  |  |  |  |  |  |  | € 0 | 18 | 28 |
BSPCE 2017 Ordinary |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of awards outstanding (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  | 97,050 |  |  |
Share price (in euros) | € / shares |  |  |  |  |  |  | € 15.93 |  |  |  |  |  |  |  |  |
Exercise price (in euro per share) | € / shares |  |  |  |  |  |  | € 15.93 |  |  |  |  |  |  |  |  |
Risk-free rate |  |  |  |  |  |  | 0.23% |  |  |  |  |  |  |  |  |
Yield |  |  |  |  |  |  | 0.00% |  |  |  |  |  |  |  |  |
Value of initial plan (in thousands of euros) |  |  |  |  |  |  | € 1,000 |  |  |  |  |  |  |  |  |
Expense for the year |  |  |  |  |  |  |  |  |  |  |  |  | € 0 | 0 | 0 |
BSPCE 2017 Ordinary | Tranche one |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Volatility |  |  |  |  |  |  | 58.00% |  |  |  |  |  |  |  |  |
BSPCE 2017 Ordinary | Tranche two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Volatility |  |  |  |  |  |  | 61.00% |  |  |  |  |  |  |  |  |
BSPCE 2017 Ordinary | Tranche three |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Volatility |  |  |  |  |  |  | 59.00% |  |  |  |  |  |  |  |  |
BSPCE 2017 Ordinary | Tranche one |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity (in years) |  |  |  |  |  |  | 5 years 6 months |  |  |  |  |  |  |  |  |
BSPCE 2017 Ordinary | Tranche two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity (in years) |  |  |  |  |  |  | 6 years |  |  |  |  |  |  |  |  |
BSPCE 2017 Ordinary | Tranche three |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity (in years) |  |  |  |  |  |  | 6 years 6 months |  |  |  |  |  |  |  |  |
BSPCE 2017 Performance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of awards outstanding (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  | 80,000 |  |  |
Share price (in euros) | € / shares |  |  |  |  |  |  | € 15.93 |  |  |  |  |  |  |  |  |
Exercise price (in euro per share) | € / shares |  |  |  |  |  |  | € 15.93 |  |  |  |  |  |  |  |  |
Volatility |  |  |  |  |  |  | 59.00% |  |  |  |  |  |  |  |  |
Maturity (in years) |  |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |
Risk-free rate |  |  |  |  |  |  | 0.11% |  |  |  |  |  |  |  |  |
Yield |  |  |  |  |  |  | 0.00% |  |  |  |  |  |  |  |  |
Value of initial plan (in thousands of euros) |  |  |  |  |  |  | € 622 |  |  |  |  |  |  |  |  |
Expense for the year |  |  |  |  |  |  |  |  |  |  |  |  | € 0 | € 0 | € 0 |
BSPCE 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of awards outstanding (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  | 177,050 | 178,100 | 179,150 |
Share price (in euros) | € / shares |  |  |  |  |  |  | € 15.93 |  |  |  |  |  |  |  |  |
Exercise price (in euro per share) | € / shares |  |  |  |  |  |  | € 15.93 |  |  |  |  |  |  |  |  |
Volatility |  |  |  |  |  |  | 59.00% |  |  |  |  |  |  |  |  |
Maturity (in years) |  |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |
Risk-free rate |  |  |  |  |  |  | 0.11% |  |  |  |  |  |  |  |  |
Yield |  |  |  |  |  |  | 0.00% |  |  |  |  |  |  |  |  |
Value of initial plan (in thousands of euros) |  |  |  |  |  |  | € 627 |  |  |  |  |  |  |  |  |
Expense for the year |  |  |  |  |  |  |  |  |  |  |  |  | € 0 | € 0 | € 0 |
BSPCE 2017 Project |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share price (in euros) | € / shares |  |  |  |  |  |  | € 15.93 |  |  |  |  |  |  |  |  |
Exercise price (in euro per share) | € / shares |  |  |  |  |  |  | € 15.93 |  |  |  |  |  |  |  |  |
Volatility |  |  |  |  |  |  | 59.00% |  |  |  |  |  |  |  |  |
Maturity (in years) |  |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |
Risk-free rate |  |  |  |  |  |  | 0.11% |  |  |  |  |  |  |  |  |
Yield |  |  |  |  |  |  | 0.00% |  |  |  |  |  |  |  |  |
Value of initial plan (in thousands of euros) |  |  |  |  |  |  | € 94 |  |  |  |  |  |  |  |  |
Expense for the year |  |  |  |  |  |  |  |  |  |  |  |  | € 0 | € 0 | € 0 |
BSA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of awards outstanding (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  | 141,251 | 151,251 | 185,251 |
Expense for the year |  |  |  |  |  |  |  |  |  |  |  |  | € 0 | € 0 | € 0 |
BSA 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of awards outstanding (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 10,000 | 10,000 |
Share price (in euros) | € / shares |  |  |  |  |  |  |  |  |  |  |  | € 18.68 |  |  |  |
Exercise price (in euro per share) | € / shares |  |  |  |  |  |  |  |  |  |  |  | € 17.67 |  |  |  |
Volatility |  |  |  |  |  |  |  |  |  |  |  | 57.00% |  |  |  |
Maturity (in years) |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |  |  |
Risk-free rate |  |  |  |  |  |  |  |  |  |  |  | 0.41% |  |  |  |
Yield |  |  |  |  |  |  |  |  |  |  |  | 0.00% |  |  |  |
Value of initial plan (in thousands of euros) |  |  |  |  |  |  |  |  |  |  |  | € 0 |  |  |  |
Expense for the year |  |  |  |  |  |  |  |  |  |  |  |  | € 0 | € 0 | € 0 |
BSA 2015-1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of awards outstanding (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  | 21,000 | 21,000 | 21,000 |
Share price (in euros) | € / shares |  |  |  |  |  |  |  |  |  |  | € 17.67 |  |  |  |  |
Exercise price (in euro per share) | € / shares |  |  |  |  |  |  |  |  |  |  | € 17.67 |  |  |  |  |
Volatility |  |  |  |  |  |  |  |  |  |  | 58.00% |  |  |  |  |
Maturity (in years) |  |  |  |  |  |  |  |  |  |  | 5 years |  |  |  |  |
Yield |  |  |  |  |  |  |  |  |  |  | 0.00% |  |  |  |  |
Value of initial plan (in thousands of euros) |  |  |  |  |  |  |  |  |  |  | € 63 |  |  |  |  |
Expense for the year |  |  |  |  |  |  |  |  |  |  |  |  | € 0 | € 0 | € 0 |
BSA 2015-1 | Tranche one |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk-free rate |  |  |  |  |  |  |  |  |  |  | 0.26% |  |  |  |  |
BSA 2015-1 | Tranche two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk-free rate |  |  |  |  |  |  |  |  |  |  | 0.27% |  |  |  |  |
BSA 2015-2 a |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of awards outstanding (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  | 64,000 | 64,000 | 64,000 |
Share price (in euros) | € / shares |  |  |  |  |  |  |  |  | € 19.54 |  |  |  |  |  |  |
Exercise price (in euro per share) | € / shares |  |  |  |  |  |  |  |  | € 19.54 |  |  |  |  |  |  |
Risk-free rate |  |  |  |  |  |  |  |  | 0.39% |  |  |  |  |  |  |
Yield |  |  |  |  |  |  |  |  | 0.00% |  |  |  |  |  |  |
Value of initial plan (in thousands of euros) |  |  |  |  |  |  |  |  | € 16 |  |  |  |  |  |  |
Expense for the year |  |  |  |  |  |  |  |  |  |  |  |  | € 0 | € 0 | € 0 |
BSA 2015-2 a | Tranche one |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Volatility |  |  |  |  |  |  |  |  | 58.00% |  |  |  |  |  |  |
BSA 2015-2 a | Tranche two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Volatility |  |  |  |  |  |  |  |  | 58.00% |  |  |  |  |  |  |
BSA 2015-2 a | Tranche three |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Volatility |  |  |  |  |  |  |  |  | 57.00% |  |  |  |  |  |  |
BSA 2015-2 a | Tranche four |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Volatility |  |  |  |  |  |  |  |  | 58.00% |  |  |  |  |  |  |
BSA 2015-2 a | Tranche one |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity (in years) |  |  |  |  |  |  |  |  | 5 years |  |  |  |  |  |  |
BSA 2015-2 a | Tranche two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity (in years) |  |  |  |  |  |  |  |  | 5 years 1 month 6 days |  |  |  |  |  |  |
BSA 2015-2 a | Tranche three |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity (in years) |  |  |  |  |  |  |  |  | 5 years 3 months 18 days |  |  |  |  |  |  |
BSA 2015-2 a | Tranche four |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity (in years) |  |  |  |  |  |  |  |  | 5 years 4 months 24 days |  |  |  |  |  |  |
BSA 2015-2 b |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share price (in euros) | € / shares |  |  |  |  |  |  |  |  | € 19.54 |  |  |  |  |  |  |
Exercise price (in euro per share) | € / shares |  |  |  |  |  |  |  |  | € 19.54 |  |  |  |  |  |  |
Yield |  |  |  |  |  |  |  |  | 0.00% |  |  |  |  |  |  |
Value of initial plan (in thousands of euros) |  |  |  |  |  |  |  |  | € 284 |  |  |  |  |  |  |
Expense for the year |  |  |  |  |  |  |  |  |  |  |  |  | € 0 | € 0 | € 0 |
BSA 2015-2 b | Tranche one |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Volatility |  |  |  |  |  |  |  |  | 58.00% |  |  |  |  |  |  |
Risk-free rate |  |  |  |  |  |  |  |  | 0.25% |  |  |  |  |  |  |
BSA 2015-2 b | Tranche two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Volatility |  |  |  |  |  |  |  |  | 60.00% |  |  |  |  |  |  |
Risk-free rate |  |  |  |  |  |  |  |  | 0.91% |  |  |  |  |  |  |
BSA 2015-2 b | Tranche one |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity (in years) |  |  |  |  |  |  |  |  | 4 years 7 months 6 days |  |  |  |  |  |  |
BSA 2015-2 b | Tranche two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity (in years) |  |  |  |  |  |  |  |  | 9 years 7 months 6 days |  |  |  |  |  |  |
BSA 2018-2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of awards outstanding (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  | 5,820 | 5,820 | 5,820 |
Share price (in euros) | € / shares |  |  |  |  |  | € 16.10 |  |  |  |  |  |  |  |  |  |
Exercise price (in euro per share) | € / shares |  |  |  |  |  | € 16.10 |  |  |  |  |  |  |  |  |  |
Volatility |  |  |  |  |  | 38.00% |  |  |  |  |  |  |  |  |  |
Maturity (in years) |  |  |  |  |  | 4 years 9 months 18 days |  |  |  |  |  |  |  |  |  |
Yield |  |  |  |  |  | 0.00% |  |  |  |  |  |  |  |  |  |
Value of initial plan (in thousands of euros) |  |  |  |  |  | € 1 |  |  |  |  |  |  |  |  |  |
Expense for the year |  |  |  |  |  |  |  |  |  |  |  |  | € 0 | € 0 | € 0 |
BSA 2018-2 | Tranche one |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk-free rate |  |  |  |  |  | 0.70% |  |  |  |  |  |  |  |  |  |
BSA 2018-2 | Tranche two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk-free rate |  |  |  |  |  | 0.10% |  |  |  |  |  |  |  |  |  |
BSA 2019-1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of awards outstanding (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  | 18,000 | 18,000 | 18,000 |
Share price (in euros) | € / shares |  |  |  |  | € 11.66 |  |  |  |  |  |  |  |  |  |  |
Exercise price (in euro per share) | € / shares |  |  |  |  | € 11.66 |  |  |  |  |  |  |  |  |  |  |
Volatility |  |  |  |  | 37.00% |  |  |  |  |  |  |  |  |  |  |
Yield |  |  |  |  | 0.00% |  |  |  |  |  |  |  |  |  |  |
Value of initial plan (in thousands of euros) |  |  |  |  | € 24 |  |  |  |  |  |  |  |  |  |  |
Expense for the year |  |  |  |  |  |  |  |  |  |  |  |  | € 0 | € 0 | € 0 |
BSA 2019-1 | Tranche one |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk-free rate |  |  |  |  | 0.16% |  |  |  |  |  |  |  |  |  |  |
BSA 2019-1 | Tranche two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk-free rate |  |  |  |  | 0.50% |  |  |  |  |  |  |  |  |  |  |
BSA 2019-1 | Tranche one |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity (in years) |  |  |  |  | 9 years 9 months 18 days |  |  |  |  |  |  |  |  |  |  |
BSA 2019-1 | Tranche two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity (in years) |  |  |  |  | 9 years 10 months 24 days |  |  |  |  |  |  |  |  |  |  |
BSA 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of awards outstanding (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  | 18,000 | 18,000 | 18,000 |
Share price (in euros) | € / shares |  |  | € 6.59 |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price (in euro per share) | € / shares |  |  | € 6.59 |  |  |  |  |  |  |  |  |  |  |  |  |
Volatility |  |  | 38.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity (in years) |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |
Yield |  |  | 0.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Value of initial plan (in thousands of euros) |  |  | € 19 |  |  |  |  |  |  |  |  |  |  |  |  |
Expense for the year |  |  |  |  |  |  |  |  |  |  |  |  | € 0 | € 0 | € 0 |
BSA 2020 | Tranche one |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk-free rate |  |  | (0.13%) |  |  |  |  |  |  |  |  |  |  |  |  |
BSA 2020 | Tranche two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk-free rate |  |  | (0.07%) |  |  |  |  |  |  |  |  |  |  |  |  |
BSA 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of awards outstanding (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  | 14,431 | 14,431 | 14,431 |
Share price (in euros) | € / shares |  | € 13.47 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price (in euro per share) | € / shares |  | € 13.47 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Volatility |  | 39.10% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity (in years) |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk-free rate |  | 0.27% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Yield |  | 0.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Value of initial plan (in thousands of euros) |  | € 44 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expense for the year |  |  |  |  |  |  |  |  |  |  |  |  | € 0 | € 0 | € 0 |
OSA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of share options outstanding in share-based payment arrangement (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  | 3,512,302 | 2,336,175 | 2,059,523 |
Expense for the year |  |  |  |  |  |  |  |  |  |  |  |  | € 2,047 | € 941 | € 548 |
AGA |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of awards outstanding (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  | 815,920 | 1,127,296 | 653,746 |
Expense for the year |  |  |  |  |  |  |  |  |  |  |  |  | € 2,252 | € 2,264 | € 2,597 |
AGA 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share price (in euros) | € / shares |  |  |  | € 5.90 |  |  |  |  |  |  |  |  |  |  |  |
Exercise price (in euro per share) | € / shares |  |  |  | € 0.00 |  |  |  |  |  |  |  |  |  |  |  |
Yield |  |  |  | 0.00% |  |  |  |  |  |  |  |  |  |  |  |
Value of initial plan (in thousands of euros) |  |  |  | € 287 |  |  |  |  |  |  |  |  |  |  |  |
Expense for the year |  |  |  |  |  |  |  |  |  |  |  |  | € 0 | € 0 | € 28 |
AGA 2020 | Tranche one |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk-free rate |  |  |  | (0.74%) |  |  |  |  |  |  |  |  |  |  |  |
AGA 2020 | Tranche two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk-free rate |  |  |  | (0.69%) |  |  |  |  |  |  |  |  |  |  |  |
AGA 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of awards outstanding (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 354,711 |
Share price (in euros) | € / shares |  | € 13.60 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price (in euro per share) | € / shares |  | € 0.00 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Yield |  | 0.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Value of initial plan (in thousands of euros) |  | € 4,869 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expense for the year |  |  |  |  |  |  |  |  |  |  |  |  | € 0 | € 694 | € 2,283 |
AGA 2021 | Tranche one |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk-free rate |  | 0.63% |  |  |  |  |  |  |  |  |  |  |  |  |  |
AGA 2021 | Tranche two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk-free rate |  | 0.59% |  |  |  |  |  |  |  |  |  |  |  |  |  |
AGA 2022 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of awards outstanding (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 293,776 | 299,035 | 0
Share price (in euros) | € / shares | € 3.68 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price (in euro per share) | € / shares | € 0.00 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Yield | 0.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Value of initial plan (in thousands of euros) | € 1,092 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expense for the year |  |  |  |  |  |  |  |  |  |  |  |  | € 253 | € 530 | € 286 |
AGA 2022 | Tranche one |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk-free rate | 0.95% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
AGA 2022 | Tranche two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk-free rate | 1.46% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
AGA 2023 - P1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of awards outstanding (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  | 392,460 | 400,960 | 0 |
Share price (in euros) | € / shares | € 4.87 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price (in euro per share) | € / shares | € 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Yield | 0.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Value of initial plan (in thousands of euros) | € 2,071 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expense for the year |  |  |  |  |  |  |  |  |  |  |  |  | € 959 | € 497 | € 0 |
AGA 2023 - P1 | Tranche one |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk-free rate | 3.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
AGA 2023 - P1 | Tranche two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk-free rate | 3.20% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
AGA 2023 - P2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of awards outstanding (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 423,460 | 432,560 | 0 | 423,460
Share price (in euros) | € / shares | € 4.87 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price (in euro per share) | € / shares | € 0.00 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Yield | 0.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Value of initial plan (in thousands of euros) | € 2,130 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expense for the year |  |  |  |  |  |  |  |  |  |  |  |  | € 1,040 | € 543 | € 0 |
AGA 2023 - P2 | Tranche one |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk-free rate | 3.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
AGA 2023 - P2 | Tranche two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Risk-free rate | 3.20% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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