Earnings and Loss per Share - Summary of Earnings and Loss per Share (Detail) - EUR (€) € / shares in Units, € in Thousands	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Numerator:
Net profit/(loss)	€ (196,447)	€ 15,218	€ (94,649)
Adjustments of profit or loss	0	0	0
Net Profit/(loss) available to common shareholders	€ (196,447)	€ 15,218	€ (94,649)
Denominator:
Weighted average shares outstanding - basic	122,348,434	105,744,929	80,546,682
Effect of potentially dilutive warrants / shares option	0	1,050,171	0
Weighted average shares outstanding - diluted	122,348,434	106,795,100	80,546,682
Earning/(Loss) per share - basic	€ (1.61)	€ 0.14	€ (1.18)
Earning/(Loss) per share - diluted	€ (1.61)	€ 0.14	€ (1.18)

The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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