Share-Based Compensation - Restricted Share Units (Details) $ / shares in Units, $ in Millions	12 Months Ended				24 Months Ended
	Dec. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2022 USD ($) £ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2022 USD ($) $ / shares shares
Number of Shares
Granted (in shares) | shares	2,120,783	2,120,783	1,043,702
Weighted Average Grant Date Fair Value
Weighted Average Grant Date Fair Value, Granted (in dollars per share) | $ / shares	$ 10		$ 21.35	$ 9.83
Restricted Stock Units (RSUs)
Number of Shares
Unvested and Outstanding, beginning balance (in shares) | shares	115,140	115,140	217,482		217,482
Granted (in shares) | shares	202,830	202,830	0
Vested (in shares) | shares	(42,635)	(42,635)	(70,482)
Forfeited (in shares) | shares	(4,200)	(4,200)	(31,860)
Unvested and Outstanding, ending balance (in shares) | shares	271,135	271,135	115,140	217,482	271,135
Weighted Average Grant Date Fair Value
Weighted Average Grant Date Fair Value, beginning balance (in dollars per share) | $ / shares	$ 10.19		$ 10.19		$ 10.19
Weighted Average Grant Date Fair Value, Granted (in dollars per share) | $ / shares	13.52		0
Weighted Average Grant Date Fair Value, Vested (in dollars per share) | $ / shares	9.77		10.19
Weighted Average Grant Date Fair Value, Forfeited (in dollars per share) | $ / shares	14.44		10.19
Weighted Average Grant Date Fair Value, ending balance (in dollars per share) | $ / shares	$ 12.23		$ 10.19	$ 10.19	$ 12.23
Unrecognized compensation cost | $	$ 2.6	$ 2.6	$ 1.2	$ 2.0	$ 2.6
Period for recognition (in years)	2 years 11 months 12 days	2 years 11 months 12 days	2 years 6 months	3 years 2 months 12 days
Exercise price (in pound sterling per share) | £ / shares		$ 0.01