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Notes to the consolidated financial statements - Additional Information (Details)
€ in Thousands, $ in Millions
1 Months Ended 6 Months Ended
Jun. 30, 2022
USD ($)
Jun. 30, 2022
EUR (€)
Jun. 30, 2021
EUR (€)
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Proceeds from the issuance of shares (net of transaction costs) $ 4.8   € 404,143
Revenue recognized   € 44,519 € 32,425