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Significant Events in the Reporting Period - Additional Information (Detail) € in Thousands, $ in Millions	Jan. 29, 2024 USD ($)	Jun. 30, 2024 EUR (€)	Dec. 31, 2023 EUR (€)	Jun. 30, 2023 EUR (€)	Dec. 31, 2022 EUR (€)
Significant Events In The Reporting Period LineItems
Balance of equity | €		€ 321,133	€ 145,697	€ (64,841)	€ (263,348)
Third Party Investors [Member]
Significant Events In The Reporting Period LineItems
Commitment from investors | $	$ 150
Ownership percentage	42.00%

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