Ordinary Shares (Details) £ / shares in Units, £ in Millions					1 Months Ended		12 Months Ended
	May 19, 2021 shares	May 04, 2021 shares	Sep. 22, 2020 USD ($) shares	Aug. 28, 2019 GBP (£)	May 31, 2021 USD ($)	May 19, 2021 USD ($)	Dec. 31, 2022 USD ($) vote shares	Dec. 31, 2021 shares	Dec. 31, 2020 shares	Sep. 22, 2020 £ / shares
Class of Stock [Line Items]
Consideration received on transaction | £				£ 25.0
Cash dividend declared or paid | $							$ 0
Exercise of share options (in shares)							462,722	1,244,709
Vested (in shares)							17,888	57,875
2017 Equity Incentive Plan
Class of Stock [Line Items]
Issuance of ordinary shares to settle vested restricted stock units (in shares)							24,747	12,607
Restricted share units vested (in shares)							42,635	70,482
Initial Public Offering
Class of Stock [Line Items]
Consideration received on transaction | $			$ 132,800,000		$ 154,800,000	$ 154,800,000
Employee Stock Purchase Plan
Class of Stock [Line Items]
Shares issued under employee share purchase plans (in shares)							22,160	0
Ordinary shares
Class of Stock [Line Items]
Sale of stock, shares issued in transaction (in shares)	600,000	4,000,000
Number of votes | vote							1
Exercise of share options (in shares)							462,722
Issuance of ordinary shares to settle vested restricted stock units (in shares)							82,622
Effect of corporate reorganization including conversion of preferred shares to ordinary shares (in shares)									16,419,172
Ordinary shares | 2021
Class of Stock [Line Items]
Issuance of ordinary shares to settle vested restricted stock units (in shares)							57,875
Ordinary shares | 2022
Class of Stock [Line Items]
Issuance of ordinary shares to settle vested restricted stock units (in shares)							24,747
Ordinary shares | 2020 Award
Class of Stock [Line Items]
Exercise of share options (in shares)								232,227
Ordinary shares | 2021 Award
Class of Stock [Line Items]
Exercise of share options (in shares)								1,476,936
American Depositary Shares | Initial Public Offering
Class of Stock [Line Items]
Sale of stock, shares issued in transaction (in shares)			8,625,000
Sale of stock, price per share (in dollars per share) | £ / shares										£ 17.00