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Share-based payments - Long term incentive plan (Details) - LTIP
$ in Thousands
12 Months Ended
Dec. 31, 2021
USD ($)
shares
Dec. 31, 2021
$ / shares
Dec. 31, 2020
USD ($)
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Share-based compensation expense | $ $ 1,314   $ 11
RSUs      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Restricted stock units, Shares authorized | shares 241,500    
Vesting period 3 years    
Minimum | RSUs      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Restricted stock units, Market price   $ 14.90  
Maximum | RSUs      
Disclosure of terms and conditions of share-based payment arrangement [line items]      
Restricted stock units, Market price   $ 23.14