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Shareholders' equity
3 Months Ended
Mar. 31, 2020
Stockholders' equity  
Stockholders' equity

Note 11 Stockholders’ equity

On January 24, 2020, the Company closed an underwritten public offering of 21,000,000 American Depository Shares (ADSs) which, together with the full exercise by the underwriters on February 7, 2020, of their option to purchase an additional 3,150,000 ADSs, generated net proceeds of $90.5 million.