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FINANCIAL INCOME, NET - Schedule of Financial Income (Expense) (Details) - EUR (€)
€ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
FINANCIAL INCOME, NET      
Interest income € 10 € 20 € 19
Interest expense (108) (165) (111)
Warrants exercised / forfeited     889
Financial income (expense), net € (98) € (146) € 797