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Notes to the consolidated financial statements - Cost of sales (Details) - Operative Expenses [Member] - EUR (€)
€ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Notes to the Consolidated Statements of Operations      
Personnel € (113,422) € (99,924) € (94,655)
Materials (78,767) (121,873) (278,542)
Third-party services (67,905) (39,501) (708,636)
Maintenance and lease (15,356) (9,381) (7,528)
Amortization and depreciation (27,229) (26,641) (17,232)
Impairment of equipment (8,085) (24,948) (22,810)
Other (8,170) (17,064) (14,415)
Total (335,760) (353,539) (1,156,247)
Cost of sales      
Notes to the Consolidated Statements of Operations      
Personnel (37,734) (27,185) (22,159)
Materials (59,641) (88,891) (46,250)
Third-party services (9,398) (32,331) (139,975)
Maintenance and lease (2,672) (2,425) (2,874)
Amortization and depreciation (4,850) (6,295) (3,992)
Impairment of equipment (8,085) (24,948) (22,810)
Other (1,986) (1,918) (135)
Total € (124,366) € (183,993) € (238,195)