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Share-Based Payments - Summary of Details of Share Based Payment Arrangement BSA (Detail) |  |  |  |  |  |  |  |  |  |  |  |  | 12 Months Ended
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Nov. 19, 2025 EUR (€) € / shares | Mar. 24, 2025 EUR (€) € / shares | Jun. 15, 2017 EUR (€) € / shares shares | Dec. 09, 2016 EUR (€) € / shares shares | Jun. 21, 2016 EUR (€) € / shares | Dec. 15, 2015 EUR (€) € / shares | Jun. 03, 2014 EUR (€) € / shares | Jul. 25, 2013 EUR (€) € / shares | Sep. 25, 2012 EUR (€) € / shares | Jan. 17, 2012 EUR (€) € / shares | Jun. 24, 2011 EUR (€) € / shares shares | Dec. 07, 2007 EUR (€) € / shares | Dec. 31, 2017 | Dec. 15, 2017 € / shares | Dec. 05, 2017 € / shares | Dec. 31, 2016 | Dec. 31, 2015
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Plan expiration date |  |  |  |  |  |  |  |  |  |  |  |  |  | 12/15/2027 | 12/05/2027 |  |
Share entitlement per BSA |  |  |  |  |  |  |  |  |  |  |  |  |  | € 1 | € 1 |  |
Number of options granted |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,300 | 625,200 |  |
BSA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of BSA granted |  |  |  |  |  |  |  |  |  |  |  |  | 68,000 |  |  | 93,500 | 25,000
Exercise price (in euros) |  |  |  |  |  |  |  |  |  |  |  |  | 9,359 |  |  | 89,835 | 77,786
BSA2010 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Plan expiration date |  |  |  |  |  |  |  |  |  |  | Nov. 22, 2021 |  |  |  |  |  |
Expected volatility |  |  |  |  |  |  |  |  |  |  | 40.00% |  |  |  |  |  |
Average life of BSA (in years) |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |
Expected dividends |  |  |  |  |  |  |  |  |  |  | 0.00% |  |  |  |  |  |
Vesting period (years) |  |  |  |  |  |  |  |  |  |  | 1 year 6 months |  |  |  |  |  |
Number of options granted |  |  |  |  |  |  |  |  |  |  | 2,000 |  | 0 |  |  | 0 | 0
Share entitlement per BSA | shares |  |  |  |  |  |  |  |  |  |  | 15 |  |  |  |  |  |
Exercise price (in euros) |  |  |  |  |  |  |  |  |  |  | 77 |  |  |  |  |  |
Grant date share fair value (in euros) | € |  |  |  |  |  |  |  |  |  |  | € 77 |  |  |  |  |  |
Discount rate |  |  |  |  |  |  |  |  |  |  | 2.68% |  |  |  |  |  |
Fair value per BSA (in euros) |  |  |  |  |  |  |  |  |  |  | € 32.70 |  |  |  |  |  |
Date of Grant Three [Member] | BSA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period (years) |  |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |  |  |
Date of Grant Three [Member] | Share-based Payment Arrangement Tranche One [Member] | BSA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period (years) |  |  |  |  |  |  |  |  | 1 year |  |  |  |  |  |  |  |
Plan expiration date |  |  |  |  |  |  |  |  | Sep. 22, 2022 |  |  |  |  |  |  |  |
Share entitlement per BSA |  |  |  |  |  |  |  |  | € 1 |  |  |  |  |  |  |  |
Exercise price (in euros) | € |  |  |  |  |  |  |  |  | € 8.59 |  |  |  |  |  |  |  |
Expected volatility |  |  |  |  |  |  |  |  | 40.00% |  |  |  |  |  |  |  |
Discount rate |  |  |  |  |  |  |  |  | 1.21% |  |  |  |  |  |  |  |
Expected dividends |  |  |  |  |  |  |  |  | 0.00% |  |  |  |  |  |  |  |
Fair value per BSA (in euros) |  |  |  |  |  |  |  |  | € 2.29 |  |  |  |  |  |  |  |
Grant date share fair value (in euros) |  |  |  |  |  |  |  |  | € 8.40 |  |  |  |  |  |  |  |
Date of Grant Three [Member] | Share-based Payment Arrangement Tranche Two [Member] | BSA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period (years) |  |  |  |  |  |  |  |  | 2 years |  |  |  |  |  |  |  |
Plan expiration date |  |  |  |  |  |  |  |  | Sep. 22, 2022 |  |  |  |  |  |  |  |
Share entitlement per BSA |  |  |  |  |  |  |  |  | € 1 |  |  |  |  |  |  |  |
Exercise price (in euros) | € |  |  |  |  |  |  |  |  | € 8.59 |  |  |  |  |  |  |  |
Expected volatility |  |  |  |  |  |  |  |  | 40.00% |  |  |  |  |  |  |  |
Discount rate |  |  |  |  |  |  |  |  | 1.21% |  |  |  |  |  |  |  |
Expected dividends |  |  |  |  |  |  |  |  | 0.00% |  |  |  |  |  |  |  |
Fair value per BSA (in euros) |  |  |  |  |  |  |  |  | € 2.43 |  |  |  |  |  |  |  |
Grant date share fair value (in euros) |  |  |  |  |  |  |  |  | € 8.40 |  |  |  |  |  |  |  |
Date of Grant Three [Member] | Share-based Payment Arrangement Tranche Three [Member] | BSA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period (years) |  |  |  |  |  |  |  |  | 3 years |  |  |  |  |  |  |  |
Plan expiration date |  |  |  |  |  |  |  |  | Sep. 22, 2022 |  |  |  |  |  |  |  |
Share entitlement per BSA |  |  |  |  |  |  |  |  | € 1 |  |  |  |  |  |  |  |
Exercise price (in euros) | € |  |  |  |  |  |  |  |  | € 8.59 |  |  |  |  |  |  |  |
Expected volatility |  |  |  |  |  |  |  |  | 40.00% |  |  |  |  |  |  |  |
Discount rate |  |  |  |  |  |  |  |  | 1.53% |  |  |  |  |  |  |  |
Expected dividends |  |  |  |  |  |  |  |  | 0.00% |  |  |  |  |  |  |  |
Fair value per BSA (in euros) |  |  |  |  |  |  |  |  | € 2.61 |  |  |  |  |  |  |  |
Grant date share fair value (in euros) |  |  |  |  |  |  |  |  | € 8.40 |  |  |  |  |  |  |  |
Date of Grant Three [Member] | Share-based Payment Arrangement Tranche Four [Member] | BSA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period (years) |  |  |  |  |  |  |  |  | 4 years |  |  |  |  |  |  |  |
Plan expiration date |  |  |  |  |  |  |  |  | Sep. 25, 2022 |  |  |  |  |  |  |  |
Share entitlement per BSA |  |  |  |  |  |  |  |  | € 1 |  |  |  |  |  |  |  |
Exercise price (in euros) | € |  |  |  |  |  |  |  |  | € 8.59 |  |  |  |  |  |  |  |
Expected volatility |  |  |  |  |  |  |  |  | 40.00% |  |  |  |  |  |  |  |
Discount rate |  |  |  |  |  |  |  |  | 1.53% |  |  |  |  |  |  |  |
Expected dividends |  |  |  |  |  |  |  |  | 0.00% |  |  |  |  |  |  |  |
Fair value per BSA (in euros) |  |  |  |  |  |  |  |  | € 2.74 |  |  |  |  |  |  |  |
Grant date share fair value (in euros) |  |  |  |  |  |  |  |  | € 8.40 |  |  |  |  |  |  |  |
Date of Grant Four [Member] | BSA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period (years) |  |  |  |  |  |  |  | 0 years |  |  |  |  | 10 years |  |  |  |
Plan expiration date |  |  |  |  |  |  |  | Jul. 25, 2023 |  |  |  |  |  |  |  |  |
Share entitlement per BSA |  |  |  |  |  |  |  | € 1 |  |  |  |  |  |  |  |  |
Exercise price (in euros) | € |  |  |  |  |  |  |  | € 8.10 |  |  |  |  |  |  |  |  |
Expected volatility |  |  |  |  |  |  |  | 40.00% |  |  |  |  |  |  |  |  |
Discount rate |  |  |  |  |  |  |  | 1.16% |  |  |  |  |  |  |  |  |
Expected dividends |  |  |  |  |  |  |  | 0.00% |  |  |  |  |  |  |  |  |
Fair value per BSA (in euros) |  |  |  |  |  |  |  | € 2.18 |  |  |  |  |  |  |  |  |
Grant date share fair value (in euros) |  |  |  |  |  |  |  | € 8.15 |  |  |  |  |  |  |  |  |
Date of Grant Five [Member] | BSA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period (years) |  |  |  |  |  |  | 0 years |  |  |  |  |  | 10 years |  |  |  |
Plan expiration date |  |  |  |  |  |  | Jun. 03, 2024 |  |  |  |  |  |  |  |  |  |
Share entitlement per BSA |  |  |  |  |  |  | € 1 |  |  |  |  |  |  |  |  |  |
Exercise price (in euros) | € |  |  |  |  |  |  | € 18.79 |  |  |  |  |  |  |  |  |  |
Expected volatility |  |  |  |  |  |  | 40.00% |  |  |  |  |  |  |  |  |  |
Discount rate |  |  |  |  |  |  | 0.71% |  |  |  |  |  |  |  |  |  |
Expected dividends |  |  |  |  |  |  | 0.00% |  |  |  |  |  |  |  |  |  |
Fair value per BSA (in euros) |  |  |  |  |  |  | € 4.98 |  |  |  |  |  |  |  |  |  |
Grant date share fair value (in euros) |  |  |  |  |  |  | € 19.01 |  |  |  |  |  |  |  |  |  |
Date of Grant 03/24/2015 [Member] | BSA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period (years) |  |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |  |  |
Plan expiration date |  | Mar. 24, 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of BSA granted |  | 10,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share entitlement per BSA |  | € 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price (in euros) | € |  | € 43.00 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected volatility |  | 36.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Discount rate |  | 0.68% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected dividends |  | 0.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value per BSA (in euros) |  | € 9.90 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Grant date share fair value (in euros) |  | € 43.00 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Date of Grant Seven [Member] | BSA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period (years) |  |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |  |  |
Plan expiration date | Nov. 19, 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of BSA granted | 15,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share entitlement per BSA | € 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price (in euros) | € | € 66.06 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected volatility | 50.91% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Discount rate | 0.81% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected dividends | 0.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value per BSA (in euros) | € 22.60 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Grant date share fair value (in euros) | € 66.06 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Date of Grant Eight [Member] | BSA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period (years) |  |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |  |  |
Plan expiration date |  |  |  |  |  | Dec. 15, 2015 |  |  |  |  |  |  |  |  |  |  |
Share entitlement per BSA |  |  |  |  |  | € 1 |  |  |  |  |  |  |  |  |  |  |
Exercise price (in euros) | € |  |  |  |  |  | € 6,414.00 |  |  |  |  |  |  |  |  |  |  |
Expected volatility |  |  |  |  |  | 51.00% |  |  |  |  |  |  |  |  |  |  |
Discount rate |  |  |  |  |  | (0.09%) |  |  |  |  |  |  |  |  |  |  |
Expected dividends |  |  |  |  |  | 0.00% |  |  |  |  |  |  |  |  |  |  |
Fair value per BSA (in euros) |  |  |  |  |  | € 7.28 |  |  |  |  |  |  |  |  |  |  |
Grant date share fair value (in euros) |  |  |  |  |  | € 42.61 |  |  |  |  |  |  |  |  |  |  |
Date of Grant 06/21/2016 [Member] | BSA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period (years) |  |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |  |  |
Plan expiration date |  |  |  |  | Jun. 21, 2016 |  |  |  |  |  |  |  |  |  |  |  |
Number of BSA granted |  |  |  |  | 20,000 |  |  |  |  |  |  |  |  |  |  |  |
Share entitlement per BSA |  |  |  |  | € 1 |  |  |  |  |  |  |  |  |  |  |  |
Exercise price (in euros) | € |  |  |  |  | € 52.97 |  |  |  |  |  |  |  |  |  |  |  |
Expected volatility |  |  |  |  | 47.00% |  |  |  |  |  |  |  |  |  |  |  |
Discount rate |  |  |  |  | (0.41%) |  |  |  |  |  |  |  |  |  |  |  |
Expected dividends |  |  |  |  | 0.00% |  |  |  |  |  |  |  |  |  |  |  |
Fair value per BSA (in euros) |  |  |  |  | € 21.59 |  |  |  |  |  |  |  |  |  |  |  |
Grant date share fair value (in euros) |  |  |  |  | € 61.25 |  |  |  |  |  |  |  |  |  |  |  |
Date of Grant 06/09/2016 [Member] | BSA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period (years) |  |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |  |  |
Date of Grant 06/09/2016 [Member] | BSA2010 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Plan expiration date |  |  |  | Dec. 09, 2026 |  |  |  |  |  |  |  |  |  |  |  |  |
Expected volatility |  |  |  | 40.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Average life of BSA (in years) |  |  |  | 5.0 |  |  |  |  |  |  |  |  |  |  |  |  |
Expected dividends |  |  |  | 0.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period (years) |  |  |  | 0 years |  |  |  |  |  |  |  |  |  |  |  |  |
Number of options granted |  |  |  | 59,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Share entitlement per BSA | shares |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price (in euros) |  |  |  | 69.75 |  |  |  |  |  |  |  |  |  |  |  |  |
Grant date share fair value (in euros) | € |  |  |  | € 63.18 |  |  |  |  |  |  |  |  |  |  |  |  |
Discount rate |  |  |  | (0.04%) |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value per BSA (in euros) |  |  |  | € 12.94 |  |  |  |  |  |  |  |  |  |  |  |  |
Date of Grant 06/15/2017 [Member] | BSA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period (years) |  |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |  |  |
Date of Grant 06/15/2017 [Member] | BSA2010 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Plan expiration date |  |  | Jun. 15, 2027 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected volatility |  |  | 39.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Average life of BSA (in years) |  |  | 5.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected dividends |  |  | 0.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period (years) |  |  | 0 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of options granted |  |  | 9,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share entitlement per BSA | shares |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price (in euros) |  |  | 59.05 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Grant date share fair value (in euros) | € |  |  | € 73.32 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Discount rate |  |  | (0.12%) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value per BSA (in euros) |  |  | € 24.02 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Date of Grant One [Member] | BSA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period (years) |  |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |  |  |
Date of Grant One [Member] | Share-based Payment Arrangement Tranche One [Member] | BSA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period (years) |  |  |  |  |  |  |  |  |  |  |  | 1 year |  |  |  |  |
Plan expiration date |  |  |  |  |  |  |  |  |  |  |  | Dec. 08, 2017 |  |  |  |  |
Number of BSA granted |  |  |  |  |  |  |  |  |  |  |  | 431 |  |  |  |  |
Share entitlement per BSA |  |  |  |  |  |  |  |  |  |  |  | € 15 |  |  |  |  |
Exercise price (in euros) | € |  |  |  |  |  |  |  |  |  |  |  | € 65.00 |  |  |  |  |
Grant date share fair value (in euros) | € |  |  |  |  |  |  |  |  |  |  |  | € 65.00 |  |  |  |  |
Expected volatility |  |  |  |  |  |  |  |  |  |  |  | 40.00% |  |  |  |  |
Average life of BSA (in years) |  |  |  |  |  |  |  |  |  |  |  | 4.5 |  |  |  |  |
Discount rate |  |  |  |  |  |  |  |  |  |  |  | 4.06% |  |  |  |  |
Expected dividends |  |  |  |  |  |  |  |  |  |  |  | 0.00% |  |  |  |  |
Fair value per BSA (in euros) |  |  |  |  |  |  |  |  |  |  |  | € 22.18 |  |  |  |  |
Date of Grant One [Member] | Share-based Payment Arrangement Tranche Two [Member] | BSA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period (years) |  |  |  |  |  |  |  |  |  |  |  | 2 years |  |  |  |  |
Plan expiration date |  |  |  |  |  |  |  |  |  |  |  | Dec. 08, 2017 |  |  |  |  |
Number of BSA granted |  |  |  |  |  |  |  |  |  |  |  | 431 |  |  |  |  |
Share entitlement per BSA |  |  |  |  |  |  |  |  |  |  |  | € 15 |  |  |  |  |
Exercise price (in euros) | € |  |  |  |  |  |  |  |  |  |  |  | € 65.00 |  |  |  |  |
Grant date share fair value (in euros) | € |  |  |  |  |  |  |  |  |  |  |  | € 65.00 |  |  |  |  |
Expected volatility |  |  |  |  |  |  |  |  |  |  |  | 40.00% |  |  |  |  |
Average life of BSA (in years) |  |  |  |  |  |  |  |  |  |  |  | 5.0 |  |  |  |  |
Discount rate |  |  |  |  |  |  |  |  |  |  |  | 4.09% |  |  |  |  |
Expected dividends |  |  |  |  |  |  |  |  |  |  |  | 0.00% |  |  |  |  |
Fair value per BSA (in euros) |  |  |  |  |  |  |  |  |  |  |  | € 23.62 |  |  |  |  |
Date of Grant One [Member] | Share-based Payment Arrangement Tranche Three [Member] | BSA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period (years) |  |  |  |  |  |  |  |  |  |  |  | 3 years |  |  |  |  |
Plan expiration date |  |  |  |  |  |  |  |  |  |  |  | Dec. 08, 2017 |  |  |  |  |
Number of BSA granted |  |  |  |  |  |  |  |  |  |  |  | 428 |  |  |  |  |
Share entitlement per BSA |  |  |  |  |  |  |  |  |  |  |  | € 15 |  |  |  |  |
Exercise price (in euros) | € |  |  |  |  |  |  |  |  |  |  |  | € 65.00 |  |  |  |  |
Grant date share fair value (in euros) | € |  |  |  |  |  |  |  |  |  |  |  | € 65.00 |  |  |  |  |
Expected volatility |  |  |  |  |  |  |  |  |  |  |  | 40.00% |  |  |  |  |
Average life of BSA (in years) |  |  |  |  |  |  |  |  |  |  |  | 5.5 |  |  |  |  |
Discount rate |  |  |  |  |  |  |  |  |  |  |  | 4.09% |  |  |  |  |
Expected dividends |  |  |  |  |  |  |  |  |  |  |  | 0.00% |  |  |  |  |
Fair value per BSA (in euros) |  |  |  |  |  |  |  |  |  |  |  | € 24.95 |  |  |  |  |
Date of Grant One [Member] | Share-based Payment Arrangement Tranche Four [Member] | BSA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period (years) |  |  |  |  |  |  |  |  |  |  |  | 4 years |  |  |  |  |
Plan expiration date |  |  |  |  |  |  |  |  |  |  |  | Dec. 08, 2017 |  |  |  |  |
Number of BSA granted |  |  |  |  |  |  |  |  |  |  |  | 427 |  |  |  |  |
Share entitlement per BSA |  |  |  |  |  |  |  |  |  |  |  | € 15 |  |  |  |  |
Exercise price (in euros) | € |  |  |  |  |  |  |  |  |  |  |  | € 65.00 |  |  |  |  |
Grant date share fair value (in euros) | € |  |  |  |  |  |  |  |  |  |  |  | € 65.00 |  |  |  |  |
Expected volatility |  |  |  |  |  |  |  |  |  |  |  | 40.00% |  |  |  |  |
Average life of BSA (in years) |  |  |  |  |  |  |  |  |  |  |  | 6.0 |  |  |  |  |
Discount rate |  |  |  |  |  |  |  |  |  |  |  | 4.10% |  |  |  |  |
Expected dividends |  |  |  |  |  |  |  |  |  |  |  | 0.00% |  |  |  |  |
Fair value per BSA (in euros) |  |  |  |  |  |  |  |  |  |  |  | € 26.22 |  |  |  |  |
Date of Grant Two [Member] | BSA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period (years) |  |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |  |  |
Date of Grant Two [Member] | Share-based Payment Arrangement Tranche One [Member] | BSA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period (years) |  |  |  |  |  |  |  |  |  | 1 year |  |  |  |  |  |  |
Plan expiration date |  |  |  |  |  |  |  |  |  | Jan. 17, 2022 |  |  |  |  |  |  |
Number of BSA granted |  |  |  |  |  |  |  |  |  | 22,459 |  |  |  |  |  |  |
Share entitlement per BSA |  |  |  |  |  |  |  |  |  | € 1 |  |  |  |  |  |  |
Exercise price (in euros) | € |  |  |  |  |  |  |  |  |  | € 5.13 |  |  |  |  |  |  |
Grant date share fair value (in euros) | € |  |  |  |  |  |  |  |  |  | € 5.13 |  |  |  |  |  |  |
Expected volatility |  |  |  |  |  |  |  |  |  | 40.00% |  |  |  |  |  |  |
Average life of BSA (in years) |  |  |  |  |  |  |  |  |  | 5.5 |  |  |  |  |  |  |
Discount rate |  |  |  |  |  |  |  |  |  | 2.33% |  |  |  |  |  |  |
Expected dividends |  |  |  |  |  |  |  |  |  | 0.00% |  |  |  |  |  |  |
Fair value per BSA (in euros) |  |  |  |  |  |  |  |  |  | € 2.05 |  |  |  |  |  |  |
Date of Grant Two [Member] | Share-based Payment Arrangement Tranche Two [Member] | BSA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period (years) |  |  |  |  |  |  |  |  |  | 2 years |  |  |  |  |  |  |
Plan expiration date |  |  |  |  |  |  |  |  |  | Jan. 17, 2022 |  |  |  |  |  |  |
Number of BSA granted |  |  |  |  |  |  |  |  |  | 22,459 |  |  |  |  |  |  |
Share entitlement per BSA |  |  |  |  |  |  |  |  |  | € 1 |  |  |  |  |  |  |
Exercise price (in euros) | € |  |  |  |  |  |  |  |  |  | € 5.13 |  |  |  |  |  |  |
Grant date share fair value (in euros) | € |  |  |  |  |  |  |  |  |  | € 5.13 |  |  |  |  |  |  |
Expected volatility |  |  |  |  |  |  |  |  |  | 40.00% |  |  |  |  |  |  |
Average life of BSA (in years) |  |  |  |  |  |  |  |  |  | 6.0 |  |  |  |  |  |  |
Discount rate |  |  |  |  |  |  |  |  |  | 2.33% |  |  |  |  |  |  |
Expected dividends |  |  |  |  |  |  |  |  |  | 0.00% |  |  |  |  |  |  |
Fair value per BSA (in euros) |  |  |  |  |  |  |  |  |  | € 2.14 |  |  |  |  |  |  |
Date of Grant Two [Member] | Share-based Payment Arrangement Tranche Three [Member] | BSA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period (years) |  |  |  |  |  |  |  |  |  | 3 years |  |  |  |  |  |  |
Plan expiration date |  |  |  |  |  |  |  |  |  | Jan. 17, 2022 |  |  |  |  |  |  |
Number of BSA granted |  |  |  |  |  |  |  |  |  | 22,459 |  |  |  |  |  |  |
Share entitlement per BSA |  |  |  |  |  |  |  |  |  | € 1 |  |  |  |  |  |  |
Exercise price (in euros) | € |  |  |  |  |  |  |  |  |  | € 5.13 |  |  |  |  |  |  |
Grant date share fair value (in euros) | € |  |  |  |  |  |  |  |  |  | € 5.13 |  |  |  |  |  |  |
Expected volatility |  |  |  |  |  |  |  |  |  | 40.00% |  |  |  |  |  |  |
Average life of BSA (in years) |  |  |  |  |  |  |  |  |  | 6.5 |  |  |  |  |  |  |
Discount rate |  |  |  |  |  |  |  |  |  | 2.61% |  |  |  |  |  |  |
Expected dividends |  |  |  |  |  |  |  |  |  | 0.00% |  |  |  |  |  |  |
Fair value per BSA (in euros) |  |  |  |  |  |  |  |  |  | € 2.26 |  |  |  |  |  |  |
Date of Grant Two [Member] | Share-based Payment Arrangement Tranche Four [Member] | BSA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting period (years) |  |  |  |  |  |  |  |  |  | 4 years |  |  |  |  |  |  |
Plan expiration date |  |  |  |  |  |  |  |  |  | Jan. 17, 2022 |  |  |  |  |  |  |
Number of BSA granted |  |  |  |  |  |  |  |  |  | 22,458 |  |  |  |  |  |  |
Share entitlement per BSA |  |  |  |  |  |  |  |  |  | € 1 |  |  |  |  |  |  |
Exercise price (in euros) | € |  |  |  |  |  |  |  |  |  | € 5.13 |  |  |  |  |  |  |
Grant date share fair value (in euros) | € |  |  |  |  |  |  |  |  |  | € 5.13 |  |  |  |  |  |  |
Expected volatility |  |  |  |  |  |  |  |  |  | 40.00% |  |  |  |  |  |  |
Average life of BSA (in years) |  |  |  |  |  |  |  |  |  | 7.0 |  |  |  |  |  |  |
Discount rate |  |  |  |  |  |  |  |  |  | 2.61% |  |  |  |  |  |  |
Expected dividends |  |  |  |  |  |  |  |  |  | 0.00% |  |  |  |  |  |  |
Fair value per BSA (in euros) |  |  |  |  |  |  |  |  |  | € 2.34 |  |  |  |  |  |  |

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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 2017-01-01 -Paragraph 47 -Subparagraph a -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_47_a_i&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The weighted average exercise price of other equity instruments (ie other than share options) granted in a share-based payment arrangement. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2017-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_45&doctype=Standard -URIDate 2017-03-09 + Details
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