Share-based compensation, Equity Incentive Plan and Pre-IPO Grants (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	12 Months Ended
	Jan. 31, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2019
Equity Incentive Plan and Pre-IPO Grants [Abstract]
Awards granted (in shares)		853,863	1,507,581	4,702,027
Expected life (years)		5 years		4 years
Stock Options [Member]
Equity Incentive Plan and Pre-IPO Grants [Abstract]
Unrecognized share-based compensation cost		$ 31.0
Unrecognized share-based compensation, weighted-average vesting period		1 year
Equity Incentive Plan [Member]
Equity Incentive Plan and Pre-IPO Grants [Abstract]
Vesting period		4 years
Awards granted (in shares)		853,863	1,507,581
Equity Incentive Plan [Member] | Non-executive Directors [Member]
Equity Incentive Plan and Pre-IPO Grants [Abstract]
Vesting period			1 year
Options monthly vesting period			3 years
Awards granted (in shares)		43,380	66,972
Equity Incentive Plan [Member] | Vested in One Year from Date of Grant [Member] | Non-executive Directors [Member]
Equity Incentive Plan and Pre-IPO Grants [Abstract]
Awards granted (in shares)			56,704
Equity Incentive Plan [Member] | Vested in Monthly Over Three Years from Date of Grant [Member] | Non-executive Directors [Member]
Equity Incentive Plan and Pre-IPO Grants [Abstract]
Awards granted (in shares)			10,268
Pre-IPO Grants [Member]
Equity Incentive Plan and Pre-IPO Grants [Abstract]
Vesting period		4 years
Awards granted (in shares)					2,911,260
Growth shares (in shares)			96,300
Incremental fair value of awards granted (in dollars per share)					$ 5.19
Exercise price (in dollars per share)				$ 17.46
Share price (in dollars per share)	$ 26
Expected life (years)	3 years
Expected volatility	90.00%
Risk free rate	0.13%
Pre-IPO Grants [Member] | Vested in One Year from Date of Grant [Member]
Equity Incentive Plan and Pre-IPO Grants [Abstract]
Vesting percentage		25.00%