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Share-based payment arrangements - Long term incentive plan 2019 (Equity-settled) (Details)
$ in Thousands
12 Months Ended
Apr. 01, 2020
shares
installment
Apr. 01, 2019
shares
Dec. 31, 2023
USD ($)
shares
Dec. 31, 2022
USD ($)
shares
Dec. 31, 2021
USD ($)
Dec. 31, 2020
installment
Dec. 31, 2019
installment
Disclosure of terms and conditions of share-based payment arrangement [line items]              
Vesting period         5 years    
Number of options granted (in shares)     0 0      
Expense from share-based payment transactions with employees | $     $ 3,945 $ 2,411 $ 761    
Long term incentive plan 2019 (equity settled)              
Disclosure of terms and conditions of share-based payment arrangement [line items]              
Number of installments | installment             3
Expense from share-based payment transactions with employees | $     0 $ 600 400    
Long term incentive plan 2019 (equity settled) | Key management personnel of entity or parent | Restricted stock units              
Disclosure of terms and conditions of share-based payment arrangement [line items]              
Annual vesting percentage             100.00%
Vesting period             3 years
Number of options granted (in shares)   152,346          
Number of options vested (in shares)       105,626      
Long term incentive plan 2020              
Disclosure of terms and conditions of share-based payment arrangement [line items]              
Number of installments | installment           3  
Expense from share-based payment transactions with employees | $     $ 200 $ 400 $ 300    
Long term incentive plan 2020 | Restricted stock units              
Disclosure of terms and conditions of share-based payment arrangement [line items]              
Annual vesting percentage 100.00%            
Vesting period 3 years   3 years        
Number of installments | installment 3            
Long term incentive plan 2020 | Key management personnel of entity or parent | Restricted stock units              
Disclosure of terms and conditions of share-based payment arrangement [line items]              
Annual vesting percentage           100.00%  
Vesting period           3 years  
Number of options granted (in shares) 144,392            
Number of options vested (in shares)     88,127