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Application of new and revised IFRS as issued by the IASB - Differences between Operating lease Commitments (Details) - USD ($)
$ in Thousands
Jan. 01, 2019
Dec. 31, 2019
Dec. 31, 2018
Application of new and revised IFRS as issued by the IASB      
Recognition exemption for short-term leases $ (166)    
Extension and termination options reasonably certain to be exercised 1,610    
Operating lease liability before discounting 6,318    
Discounted using the incremental borrowing rate at January 1, 2019 5,899    
Lease liabilities recognized at January 1, 2019 $ 5,899 $ 4,220 $ 0