Share-Based Compensation - Restricted Share Unit (Details)	6 Months Ended
	Jun. 30, 2022 USD ($) $ / shares shares	Jun. 30, 2022 USD ($) £ / shares $ / shares shares	Jun. 30, 2021 USD ($) $ / shares shares	Dec. 31, 2021 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested (in shares) | shares	2,443,479	2,443,479
Unvested (in dollars per share) | $ / shares	$ 19.88	$ 19.88
Granted (in shares) | shares	1,217,818	1,217,818	312,132
Granted (in dollars per share) | $ / shares	$ 10.67		$ 25.29
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unvested (in shares) | shares	186,411	186,411		115,140
Unvested (in dollars per share) | $ / shares	$ 11.86	$ 11.86		$ 10.19
Granted (in shares) | shares	92,590	92,590
Granted (in dollars per share) | $ / shares	$ 13.13
Vested (shares) | shares	(21,319)	(21,319)
Vested (in dollars per share) | $ / shares	$ 10.27
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Number of Shares | shares	0	0
Forfeited (in dollars per share) | $ / shares	$ 0
Unrecognized compensation cost | $	$ 2,000,000.0	$ 2,000,000.0	$ 1.8
Period for recognition (in years)	2 years 11 months 12 days	2 years 11 months 12 days	3 years 18 days
Exercise price (in pound sterling per share) | £ / shares		$ 0.01