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Share-based compensation - Additional Information (Details)
 9 Months Ended 12 Months Ended 36 Months Ended
Apr. 22, 2021
Jan. 19, 2022
shares
Dec. 31, 2023
shares
year
plan
$ / shares
Dec. 31, 2022
shares
$ / shares
Dec. 31, 2022
shares
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]          
Number of share option plans | plan     3    
2013 ISOP          
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]          
Number of share options granted (in shares)         0
Expected life of share options (years) | year     10    
Vesting percentage on second anniversary of grant date     0.50    
Vesting percentage on third anniversary     0.50    
Share options exercised (in shares)     39,000 193,560  
Weighted average share price at date of exercise (in dollars per share) | $ / shares     $ 4.82 $ 7.41  
2019 ISOP          
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]          
Number of share options granted (in shares)     0    
Vesting percentage on each anniversary over four year     0.25    
Vesting period on each anniversary     4 years    
Vesting period of unvested options in event of IPO or public listing 6 months        
Share options exercised (in shares)   0 32,000 47,000  
Weighted average share price at date of exercise (in dollars per share) | $ / shares     $ 4.65 $ 6.19  
2021 EIP          
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]          
Number of share options granted (in shares)     3,734,266 1,336,284  
Share options exercised (in shares)     5,194    
Weighted average share price at date of exercise (in dollars per share) | $ / shares     $ 3.79 $ 0  
2021 EIP | Vesting Tranche Two          
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]          
Vesting period on each anniversary     4 years    
Vesting percentage on first anniversary on grant date     0.25    
Vesting percentage on monthly basis over remaining three years     0.75    
Vesting period on monthly basis     3 years    
2021 EIP | Restricted Stock Units          
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]          
Number of shares granted (in shares)     2,658,150 1,776,832  
2021 EIP | Restricted Stock Units | Vesting Tranche One          
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]          
Vesting percentage on first anniversary on grant date     0.25 0.25  
Vesting percentage on monthly basis over remaining three years     0.75 0.75  
Number of instruments granted subject to four year vesting (in shares)     2,260,649 1,396,366  
RSU vesting period     4 years 4 years  
RSU vesting period on quarterly basis     3 years    
RSU vesting period on monthly basis       3 years  
2021 EIP | Restricted Stock Units | Vesting Tranche Two          
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]          
Number of instruments granted subject to four year vesting (in shares)     107,647    
RSU vesting period     2 years    
Number of instruments granted subject to vesting upon annual general meeting (in shares)       380,466  
2021 EIP | Restricted Stock Units | Vesting Tranche Three          
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]          
Number of instruments granted subject to four year vesting (in shares)     289,854