Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation - Additional Information (Details)

Share-Based Compensation - Additional Information (Details) - USD ($) $ in Thousands							3 Months Ended
	Nov. 24, 2021	Jun. 23, 2021	Jun. 10, 2020	Feb. 14, 2020	Dec. 05, 2018	May 18, 2017	Mar. 31, 2024	Mar. 31, 2023	Mar. 14, 2018	Nov. 18, 2015
Employees and Directors
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share options granted							0	857,500
Unvested employee options outstanding							635,287	1,139,877
Employee Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expense recognized							$ 123	$ 177
Unamortized compensation expense share options							$ 877	$ 1,454
Vesting period							1 year 10 months 6 days	2 years 9 months 18 days
Risk-free interest rate based on estimate of U.S. treasury yield							7 years
Restricted Share Units (RSUs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expense recognized							$ 15	$ 216
Unamortized compensation expense							$ 101	$ 200
Stock-based compensation expense, expected weighted average period for recognition							1 year 8 months 1 day	2 years 7 months 13 days
Restricted Share Units (RSUs) \| Employees and Directors
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares, granted/awarded							0	0
Restricted Share Units (RSUs) \| Director
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period							1 year
Options and Restricted Share Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period							1 year 9 months 29 days	2 years 9 months 14 days
Unamortized compensation expense							$ 978	$ 1,654
2015 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares authorized										14,895
Number of ordinary shares available for issuance						29,535
Increase in number of ordinary shares available for issuance						14,640
2018 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares authorized		1,295,819							67,897
Increase in number of ordinary shares available to be granted, percentage				4.00%	4.00%
Increase in number of ordinary shares available to be granted		1,000,000	150,000	39,650	38,272
2018 Plan \| Restricted Share Units (RSUs) \| Employees
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period							2 years
2021 Inducement Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Increase in number of ordinary shares available to be granted	333,333
2021 Inducement Plan \| Restricted Share Units (RSUs) \| Employees
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period							4 years
2015 Plan, 2018 Plan and 2021 Inducement Plan \| Employee Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period							4 years
Vesting rights							The vesting requirement is conditioned upon a grantee’s continued service with the Company during the vesting period. Once vested, all awards are exercisable from the date of grant until they expire. The option grants are non-transferable. Vested options generally remain exercisable for 90 days subsequent to the termination of the option holder’s service with the Company. In the event of an option holder’s disability or death while employed by or providing service to the Company, the exercisable period extends to twelve months or eighteen months, respectively.
Share option granted term							10 years
2015 Plan, 2018 Plan and 2021 Inducement Plan \| Employee Stock Option \| Director
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period							1 year