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Share based compensation, Fair Values of the Options Granted (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2024
USD ($)
yr
$ / shares
Sep. 30, 2023
USD ($)
Sep. 30, 2024
USD ($)
yr
$ / shares
Sep. 30, 2023
USD ($)
Dec. 31, 2023
USD ($)
Weighted average assumptions [Abstract]          
Award life (weighted average) | yr 5.47   5.73    
Expected dividends 0.00%   0.00%    
Other reserves within equity on consolidated statement | $ $ 4,866   $ 4,866   $ 4,651
Expense for awards recognized | $ 300 $ 600 412 $ 1,649  
Share Option Plan [member]          
Weighted average assumptions [Abstract]          
Other reserves within equity on consolidated statement | $ $ 4,100   $ 4,100   $ 4,200
Employees [Member]          
Weighted average assumptions [Abstract]          
Strike price (in dollars per share) $ 9.51   $ 9.82    
Non-executive Directors [Member]          
Weighted average assumptions [Abstract]          
Strike price (in dollars per share) 0.025   0.025    
Bottom of Range [Member]          
Weighted average assumptions [Abstract]          
Share price (in dollars per share) $ 6.69   $ 5.8    
Expected volatility 85.00%   85.00%    
Risk-free interest rate 3.54%   3.54%    
Top of Range [Member]          
Weighted average assumptions [Abstract]          
Share price (in dollars per share) $ 12.18   $ 14.81    
Expected volatility 92.00%   92.00%    
Risk-free interest rate 4.26%   4.52%