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Assets and liabilities held for sale - Narrative (Details) - USD ($)
$ in Thousands
 1 Months Ended 3 Months Ended 12 Months Ended
Feb. 28, 2023
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2022
Dec. 31, 2023
Nov. 30, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Debt Instrument, Revised Redemption Period           6 months
Loss on the sale of business classified as held for sale (refer to Note 7)   $ 0 $ 802      
Impairment charge on assets classified as held-for-sale     $ 802      
The Business            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Percentage of issued and outstanding shares (in percent)         100.00%  
Contingent consideration, asset         $ 10,600  
Net consideration transferred $ 2,091          
Loss on the sale of business classified as held for sale (refer to Note 7) $ 802          
Impairment charge on assets classified as held-for-sale       $ 32,575    
The Business | Fixed rate unsecured loan note            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Interest rate on senior notes (in percentage)         1.50%  
Debt instrument, face amount         $ 18,001  
Debt Instrument, Face Amount, Contingent Reduced Redemption Value   1,500       $ 1,500
Gain on extinguishment of debt   $ 1,500