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Income taxes - Effective Tax Rate (Details) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Jul. 30, 2021
May 31, 2021
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Net operating loss carryforwards utilization         $ 1,200
Enacted tax rate     25.80% 25.00% 25.00%
Deferred tax (benefit) expense     $ (1,494) $ 3,210 $ (16,419)
Income tax benefit of past share issuance cost     808 3,047  
Revenue     106,483 524,002 37,514
License revenues          
Revenue   $ 462,400 $ 100,000 $ 517,400 $ 4,352
U.S. operations          
Effective income tax rate     27.32%    
Enacted tax rate     21.00%    
France          
Effective income tax rate     25.00%    
Operating Loss Carryforwards, Not Subject to Expiration     $ 23,300    
Percentage of corporate tax rate     3.30%    
Effective income tax rate continuing operations     25.80%    
CSL Behring collaboration.          
Revenue     $ 100,000    
Acquisition of Corlieve          
Enacted tax rate 25.00%