The exercise price of outstanding share options.

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- Definition

The number of share options outstanding in a share-based payment arrangement.

+ References

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- Definition

The weighted average fair value of share options granted during the period at the measurement date. [Refer: Weighted average [member]]

+ References

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- Definition

The weighted average remaining contractual life of outstanding share options. [Refer: Weighted average [member]]

+ References

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Description of weighted average remaining contractual life of share options.

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- Definition

Disclosure Of Number And Exercise Prices Of Outstanding Share Options Line Items

+ References

No definition available.

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Employee Benefits - Summary of Weighted Average Exercise Price For Both Share-based Payment Plans (Detail)	12 Months Ended
	Dec. 31, 2023 EUR (€) shares € / shares	Dec. 31, 2022 EUR (€) shares € / shares	Dec. 31, 2021 EUR (€) shares € / shares	Dec. 31, 2020 shares
Disclosure of Number and Exercise Prices of Outstanding Share Options [Line Items]
Options	9,721,609	13,081,328	8,838,015
Management Stock Option Plan [Member]
Disclosure of Number and Exercise Prices of Outstanding Share Options [Line Items]
Options	3,003,867	6,238,316	7,253,823	3,052,471
Exercise price \| € / shares	€ 0.0021	€ 0.0021	€ 0.0021
Average Fair Value \| €	€ 2,910	€ 3,100	€ 570
Weighted Average Remaining Contractual Life Of Outstanding Share Options	2024 years
Employee Stock Option Plan [Member]
Disclosure of Number and Exercise Prices of Outstanding Share Options [Line Items]
Options	910,382	1,285,619	1,584,192	1,999,660
Exercise price \| € / shares	€ 0.5
Average Fair Value \| €	€ 880	€ 850	€ 850
Description Of Weighted Average Remaining Contractual Life Of Share Options	All options are vested
Founders Stock Option Plan [Member]
Disclosure of Number and Exercise Prices of Outstanding Share Options [Line Items]
Options	1,013,609	1,033,609	0
Exercise price \| € / shares	€ 1.93	€ 1.93
Average Fair Value \| €	€ 7,930	€ 7,930
Description Of Weighted Average Remaining Contractual Life Of Share Options	All options are vested
RSU Employees [Member]
Disclosure of Number and Exercise Prices of Outstanding Share Options [Line Items]
Options	2,984,802	2,027,765	0
Average Fair Value \| €	€ 1,550	€ 9,320
Description Of Weighted Average Remaining Contractual Life Of Share Options	All options are vested
RSU Coil & Ares [Member]
Disclosure of Number and Exercise Prices of Outstanding Share Options [Line Items]
Options	350,615	496,019
Average Fair Value \| €	€ 9,430	€ 9,430
Weighted Average Remaining Contractual Life Of Outstanding Share Options	2024 years
RSU Management [Member]
Disclosure of Number and Exercise Prices of Outstanding Share Options [Line Items]
Options	1,458,334	2,000,000	0
Average Fair Value \| €	€ 2,810	€ 2,810
Bottom of range [member] \| RSU Management [Member]
Disclosure of Number and Exercise Prices of Outstanding Share Options [Line Items]
Weighted Average Remaining Contractual Life Of Outstanding Share Options	2024 years
Top of range [member] \| RSU Management [Member]
Disclosure of Number and Exercise Prices of Outstanding Share Options [Line Items]
Weighted Average Remaining Contractual Life Of Outstanding Share Options	2029 years