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Loss per share (Tables)
12 Months Ended
Dec. 31, 2021
Earnings per share [abstract]  
Schedule of basic and diluted loss per share
For the year ended December 31,
202120202019
Net loss for the period (in thousands of euros)(47,063)(33,590)(50,915)
Weighted average number of shares34,733,418 24,385,827 21,631,514 
Basic loss per share (in euros)(1.35)(1.38)(2.35)
Diluted loss per share (in euros)(1.35)(1.38)(2.35)