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Events After the Reporting Period - Stock Split (Details) - Ordinary shares
Jan. 04, 2021
kr / shares
Dec. 31, 2020
kr / shares
Aug. 10, 2020
kr / shares
Dec. 31, 2019
kr / shares
Disclosure of non-adjusting events after reporting period [line items]        
Nominal value per share   kr 1 kr 1 kr 1
Stock Split        
Disclosure of non-adjusting events after reporting period [line items]        
Share split ratio 2      
Bonus issue share ratio 17      
Nominal value per share prior to stock split kr 2      
Nominal value per share kr 1