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Share-based payments (Tables)

12 Months Ended

Dec. 31, 2024

Disclosure of terms and conditions of share-based payment arrangement [abstract]

Disclosure of number and weighted average remaining contractual life of founders' warrants, warrants, and free shares outstanding

The number of warrants and options outstanding on December 31, 2024 and their main characteristics, are detailed below:

Founders’ warrants

			Pre-2024 founders’ warrant plan
						BSPCE 09-2014						BSPCE 2015-1						BSPCE 2015-03						BSPCE 2016 Ordinary						BSPCE 2016 Performance						BSPCE 2017 Ordinary						BSPCE 2017
Type of underlying asset						New shares						New shares						New shares						New shares						New shares						New shares						New shares
Number of founder’s warrants granted						97,200						71,650						53,050						126,400						129,250						117,650						80,000
Date of shareholders' resolution approving the plan						06/18/2014						06/18/2014						06/18/2014						06/25/2015						06/25/2015						06/23/2016						06/23/2016
Grant date						09/16/2014						02/10/2015						06/10/2015						02/02/2016						02/02/2016						01/07/2017						01/07/2017
Contractual expiration date						09/16/2024						02/10/2025						06/10/2025						02/02/2026						02/02/2026						01/07/2027						01/07/2027
Grant price						—						—						—						—						—						—						—
Exercise price						€18.68						€18.57						€20.28						€14.46						€14.46						€15.93						€15.93
Number of founders’ warrants as of December 31, 2024						—						67,750						27,350						96,817						98,100						97,050						80,000
Number of founders’ warrants exercised						—						—						—						333						—						—						—
Including founders’ warrants exercised during the period						—						—						—						—						—						—						—
Number of founders’ warrants lapsed or cancelled						97,200						3,900						25,700						29,250						31,150						20,600						—
Including founders’ warrants lapsed or cancelled during the period						85,750						350						1,050						1,050						1,050						1,050						—

Warrants (BSA)

						Pre-2024 warrant plans
						BSA 2014						BSA 2015-1						BSA 2015-2 (a)						BSA 2018-2						BSA 2019-1						BSA 2020						BSA 2021 (a)
Type of underlying assets						New shares						New shares						New shares						New shares						New shares						New shares						New shares
Number of warrants granted						14,000						26,000						64,000						5,820						18,000						18,000						48,103
Date of shareholders' resolution approving the plan						06/18/2014						06/18/2014						06/18/2014						05/23/2018						05/23/2018						04/11/2019						11/30/2020
Grant date						09/16/2014						02/10/2015						06/25/2015						07/27/2018						03/29/2019						03/17/2020						04/20/2021
Contractual expiration date						09/16/2024						02/10/2025						06/25/2025						07/27/2028						03/29/2029						03/17/2030						04/20/2031
Grant price						€4.87						€4.87						€5.00						€2.36						€1.15						€0.29						€2.95
Exercise price						€17.67						€17.67						€19.54						€16.10						€11.66						€6.59						€13.47
Number of warrants as of December 31, 2024						—						21,000						64,000						5,820						18,000						18,000						14,431
Number of warrants exercised						—						—						—						—						—						—						—
Including warrants exercised during the period						—						—						—						—						—						—						—
Number of warrants lapsed or cancelled						14,000						5,000						—						—						—						—						33,672
Including warrants lapsed or cancelled during the period						10,000						—						—						—						—						—						—

Free shares

						Pre-2024 free shares plan vested			Pre-2024 free shares plan not yet vested
						AGA 2022			AGA 2023 - P1						AGA 2023 - P1
Type of underlying assets						New shares			New shares						New shares
Number of free shares granted						300,039			427,110						439,210
Date of shareholders' resolution approving the plan						04/28/2021			06/27/2023						06/27/2023
Grant date						06/22/2022			06/27/2023						06/27/2023
Grant price						—			—						—
Exercise price						—			—						—
Number of free shares as of December 31, 2024						—			392,460						423,460
Number of free shares exercised						293,523			—						—
Including free shares exercised during the period						293,523			—						—
Number of free shares lapsed or cancelled						6,516			34,650						15,750
Including free shares lapsed or cancelled during the period						253			8,500						9,100

						BSPCE						BSA						OSA						AGA						Total
Total number of shares underlying grants outstanding as of December 31, 2024						467,067						141,251						3,512,302						815,920						4,936,540

						BSPCE						BSA						OSA						AGA						Total
Total number of shares underlying grants outstanding as of December 31, 2023						557,367						151,251						2,336,175						1,127,296						4,172,089

						BSPCE						BSA						OSA						AGA						Total
Total number of shares underlying grants outstanding as of December 31, 2022						614,726						185,251						2,059,523						653,746						3,513,246

Disclosure of number and weighted average remaining contractual life of share options outstanding

Stock options

						Pre-2024 stock option plans																																																																								2024 stock options plan
						OSA 2016-1 Performance						OSA 2016-2						OSA 2017 Ordinary						OSA 2018						OSA 2019-1						OSA LLY 2019						OSA 2020						OSA 2021-04						OSA 2021-06						OSA 2022-06 Ordinary						OSA 2022-06 Performance						OSA 2023-01 Ordinary						OSA 2024-01 Ordinary
Type of underlying asset						New shares						New shares						New shares						New shares						New shares						New shares						New shares						New shares						New shares						New shares						New shares						New shares						New shares
Number of options granted						6,400						4,000						3,500						62,000						37,500						500,000						407,972						571,200						120,000						410,500						170,400						338,860						1,224,780
Date of shareholders' resolution approving the plan						06/25/2015						06/23/2016						06/23/2016						06/14/2017						05/23/2018						04/11/2019						04/11/2019						11/30/2020						04/28/2021						04/28/2021						11/30/2020						06/27/2023						05/23/2024
Grant date						02/02/2016						11/03/2016						01/07/2017						03/06/2018						03/29/2019						10/24/2019						03/11/2020						04/20/2021						06/21/2021						06/22/2022						06/22/2022						07/20/2023						05/23/2024
Contractual expiration date						02/02/2026						11/03/2026						01/07/2027						03/06/2028						03/29/2029						10/24/2029						03/11/2030						04/20/2031						06/21/2031						06/22/2032						06/22/2032						07/20/2033						05/23/2034
Grant price						—						—						—						—						—						—						—						—						—						—						—						—						—
Exercise price						€13.05						€14.26						€14.97						€12.87						€11.08						€6.41						€6.25						€13.74						€12.99						€4.16						€4.16						€5.00						€5.81
Number of options as of December 31, 2024						400						4,000						500						50,000						24,750						500,000						368,707						384,132						120,000						386,333						133,080						318,860						1,221,540
Number of options exercised						—						—						—						—						—						—						—						—						—						—						—						—						—
Number of options as of Including options exercised during the period						—						—						—						—						—						—						—						—						—						—						—						—						—
Number of options lapsed or cancelled						6,000						—						3,000						12,000						12,750						—						39,265						187,068						—						24,167						37,320						20,000						3,240
Including options lapsed or cancelled during the period						—						—						—						2,000						1,000						—						9,068						12,068						—						8,167						13,110						—						3,240

						BSPCE						BSA						OSA						AGA						Total
Total number of shares underlying grants outstanding as of December 31, 2024						467,067						141,251						3,512,302						815,920						4,936,540

						BSPCE						BSA						OSA						AGA						Total
Total number of shares underlying grants outstanding as of December 31, 2023						557,367						151,251						2,336,175						1,127,296						4,172,089

						BSPCE						BSA						OSA						AGA						Total
Total number of shares underlying grants outstanding as of December 31, 2022						614,726						185,251						2,059,523						653,746						3,513,246

Disclosure of indirect measurement of fair value of goods or services received, other equity instruments granted during period

BSPCE			Share price (in euros)			Exercise price (in euros)			Volatility			Maturity (in years)			Risk-free rate			Yield			Value of initial plan (in thousands of euros)			Expense for the year ended 2024 (in thousands of euros)			Expense for the year ended 2023 (in thousands of euros)			Expense for the year ended 2022 (in thousands of euros)
BSPCE 09-2014			18.68			18.68			58		%	5.5/6/6.5			0.64		%	0.00		%	965			—			—			—
BSPCE 2015-1			18.57			18.57			58% - 62% - 61%			5.5/6/6.5			0.39		%	0.00		%	50			—			—			—
BSPCE 2015-3			20.28			20.28			61% - 62% - 61%			5.5/6/6.5			0.56		%	0.00		%	483			—			—			—
BSPCE 2016 Ordinary			14.46			14.46			59% - 62% - 60%			5.5/6/6.5			0.32		%	0.00		%	1,080			—			—			—
BSPCE 2016 Performance			14.46			14.46			59		%	5			0.19		%	0.00		%	1,212			—			18			28
BSPCE 2017 Ordinary			15.93			15.93			58% - 61% - 59%			5.5/6/6.5			0.23		%	0.00		%	1,000			—			—			—
BSPCE 2017 Performance			15.93			15.93			59		%	5			0.11		%	0.00		%	622			—			—			—
BSPCE 2017			15.93			15.93			59		%	5			0.11		%	0.00		%	627			—			—			—
BSPCE 2017 Project			15.93			15.93			59		%	5			0.11		%	0.00		%	94			—			—			—
Total BSPCE			n.a.			n.a.			n.a.			n.a.			n.a.			n.a.			n.a.			—			18			28

BSA			Share price (in euros)			Exercise price (in euros)			Volatility			Maturity (in years)			Risk-free rate			Yield			Value of initial plan (in thousands of euros)			Expense for the year ended 2024 (in thousands of euros)			Expense for the year ended 2023 (in thousands of euros)			Expense for the year ended 2022 (in thousands of euros)
BSA 2014			18.68			17.67			57		%	5			0.41		%	0.00		%	—			—			—			—
BSA 2015-1			17.67			17.67			58		%	5			0.26% - 0.27%			0.00		%	63			—			—			—
BSA 2015-2 a			19.54			19.54			58%-58%-57%-58%			5/5.1/5.3/5.4			0.39		%	0.00		%	16			—			—			—
BSA 2015-2 b			19.54			19.54			58% - 60%			4.6 – 9.6			0.25% - 0.91%			0.00		%	284			—			—			—
BSA 2018-2			16.10			16.10			38		%	4.8			0.7% - 0.1%			0.00		%	1			—			—			—
BSA 2019-1			11.66			11.66			37		%	9.8/9.9			0.16% - 0.50%			0.00		%	24			—			—			—
BSA 2020			6.59			6.59			38		%	10			(0.13)% - (0.07)%			0.00		%	19			—			—			—
BSA 2021 (a)			13.47			13.47			39.10		%	10			0.27		%	0.00		%	44			—			—			—
Total BSA			n.a.			n.a.			n.a.			n.a.			n.a.			n.a.			n.a.			—			—			—

AGA			Share price (in euros)			Exercise price (in euros)			Volatility			Maturity (in years)			Risk-free rate			Yield			Value of initial plan (in thousands of euros)			Expense for the year ended 2024 (in thousands of euros)			Expense for the year ended 2023 (in thousands of euros)			Expense for the year ended 2022 (in thousands of euros)
AGA 2020			5.90			0.00			n.a.			n.a.			'-0.74%/ -0.69%			0.00		%	287			—			—			28
AGA 2021			13.60			0.00			n.a.			n.a.			0.63% 0.59%			0.00		%	4,869			—			694			2,283
AGA 2022			3.68			0.00			n.a.			n.a.			0.95% 1.46%			0.00		%	1,092			253			530			286
AGA 2023 - P1			4.87			0			n.a.			n.a.			3% 3.20%			0.00		%	2,071			959			497			—
AGA 2023 - P2			4.87			0.00			n.a.			n.a.			3% 3.20%			0.00		%	2,130			1,040			543			—
Total AGA			n.a.			n.a.			n.a.			n.a.			n.a.			n.a.			n.a.			2,252			2,264			2,597

(in thousands of euros)						BSPCE						BSA						OSA						AGA						Total
Expense for the year ended December 31, 2024						—						—						2,047						2,252						4,298

(in thousands of euros)						BSPCE						BSA						OSA						AGA						Total
Expense for the year ended December 31, 2023						18						—						941						2,264						3,222

(in thousands of euros)						BSPCE						BSA						OSA						AGA						Total
Expense for the year ended December 31, 2022						28						—						548						2,597						3,173

Disclosure of indirect measurement of fair value of goods or services received, share options granted during period

OSA			Share price (in euros)			Exercise price (in euros)			Volatility			Maturity (in years)			Risk-free rate			Yield			Value of initial plan (in thousands of euros)			Expense for the year ended 2024 (in thousands of euros)			Expense for the year ended 2023 (in thousands of euros)			Expense for the year ended 2022 (in thousands of euros)
OSA 2016 Ordinary			13.05			13.05			59% - 62% - 60%			5.5 / 6 /6.5			0.32		%	0.0		%	117			—			—			—
OSA 2016 Performance			13.05			13.05			59		%	5			0.19		%	0.0		%	69			—			—			—
OSA 2016-2			14.26			14.26			58% - 62% - 59%			5.5 / 6 /6.5			0.04		%	0.0		%	27			—			—			—
OSA 2017 Ordinary			15.93			14.97			58% - 61% - 59%			5.5 / 6 /6.5			0.23		%	0.0		%	31			—			—			—
OSA 2017 Performance			15.93			14.97			59		%	5			0.11		%	0.0		%	35			—			—			—
OSA 2018			12.87			12.87			35		%	5.5 / 6 /6.5			0.00		%	0.0		%	252			—			—			—
OSA 2019-1			11.08			11.08			38.1% / 37.4%			6 /6.5			0.103% / 0.149%			0.0		%	140			—			—			(1)
OSA 2019 LLY			6.41			6.41			37		%	10			0.40		%	0.0		%	252			—			—			—
OSA 2020			6.25			6.25			38		%	10			0.31		%	0.0		%	939			—			13			101
OSA 2021-04 O			13.60			13.74			38.9% - 37.8% - 38.3%			5.5 / 6 /6.5			0.38%/ 0.33%/ 0.28%			0.0		%	684			5			34			(28)
OSA 2021-04 P			13.60			13.74			39.10		%	10			0.03		%	0.0		%	1,816			226			216			163
OSA 2021-06 O			12.20			12.99			39.2% / 37.9% / 38.1%			5.5 6 6.5			0.35%  0.30% 0.26%			0.0		%	246			13			47			107
OSA 2021-06 P			12.20			12.99			39.10		%	10			0.13		%	0.0		%	212			24			24			24
OSA 2022-06 O			3.68			4.16			42.06% 41.21% 40.65%			5.5 / 6/6.5			1.83% / 1.87% / 1.90%			0.0		%	580			86			267			178
OSA 2022-06 P			3.68			4.16			40.08		%	10			2.28		%	0.0		%	80			11			20			4
OSA 2023 - 01 O			6.75			5.00			45.07% - 44.11% - 43.41%			5.55 / 6 / 6.5			2.85% / 2.83% / 2.82%			0.0		%	1,255			544			321			—
OSA 2024 - 01 O			5.19			5.81			53.30% / 51.9% / 50.7%			5.4 / 5.9 / 6.4			3.00% / 3.02% / 3.02%			0.0		%	3,107			1,138			—			—
Total OSA			n.a.			n.a.			n.a.			n.a.			n.a.			n.a.			n.a.			2,047			941			548

(in thousands of euros)						BSPCE						BSA						OSA						AGA						Total
Expense for the year ended December 31, 2024						—						—						2,047						2,252						4,298

(in thousands of euros)						BSPCE						BSA						OSA						AGA						Total
Expense for the year ended December 31, 2023						18						—						941						2,264						3,222

(in thousands of euros)						BSPCE						BSA						OSA						AGA						Total
Expense for the year ended December 31, 2022						28						—						548						2,597						3,173

X

- Definition

The disclosure of information about indirect, by reference to the fair value of the equity instruments granted, measurement of the fair value of goods or services received as consideration for the entity's other equity instruments (ie other than share options).

+ References

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-Number 2
-IssueDate 2024-01-01
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The disclosure of information about indirect, by reference to the fair value of the equity instruments granted, measurement of the fair value of goods or services received as consideration for the entity's share options.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2024-01-01
-Paragraph 47
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The disclosure of the number and weighted average remaining contractual life of outstanding share options. [Refer: Weighted average [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2024-01-01
-Paragraph 45
-Subparagraph d
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