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CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - EUR (€)
€ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
CONSOLIDATED STATEMENTS OF CASH FLOWS      
Subscriptions to BSA share warrants € 539 € 49 € 13
Decrease / (increase) of prepaid expenses € (1,100) (4,100) € (2,800)
Indemnification amount received   € 2,000