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Investments in associates and results related to associates (Details)
€ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
May 31, 2021
Mar. 31, 2022
Dec. 31, 2021
EUR (€)
Jun. 30, 2022
EUR (€)
director
Disclosure of associates [line items]        
Investments in associates     € 8  
Results related to associates       € (8)
Yarrow Biotechnology, Inc        
Disclosure of associates [line items]        
Proportion of ownership interest in associate 8.00% 5.10% 4.90% 5.10%
Investments in associates     € 8 € 0
Total number of board members | director       3
Right to appoint number of board member | director       1
Results related to associates       € (8)