Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation - Additional Information (Details)

v3.22.1
Share-Based Compensation - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended
Nov. 24, 2021
Jun. 23, 2021
Jun. 22, 2021
Jun. 10, 2020
Feb. 14, 2020
Dec. 31, 2018
Dec. 05, 2018
Mar. 31, 2022
Mar. 31, 2021
Mar. 14, 2018
May 18, 2017
Nov. 18, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Number of Shares, Granted               197,436        
Employees and Directors                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Number of Shares, Granted                 0      
Employee Stock Options                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Unvested employee options outstanding               15,679,663 235,645      
Expense recognized               $ 1,681 $ 164      
Unamortized compensation expense share options               $ 19,917 $ 806      
Vesting period               3 years 2 months 26 days 1 year 2 months 15 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               $ 214 $ 82      
Number of shares, granted/awarded               29,381        
Unamortized stock compensation expense               $ 1,130        
Stock-based compensation expense, expected weighted average period for recognition               1 year 11 months 15 days 1 year 4 months 17 days      
Unamortized compensation expense                 $ 1,834      
Restricted Share Units (RSUs) | Employees and Directors                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Number of shares, granted/awarded               29,381 1,198,136      
Restricted Share Units (RSUs) | Director                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Vesting period               1 year        
Performance RSUs                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Expense recognized                 $ 35      
Number of shares, granted/awarded               0        
Options and Restricted Share Units and Performance Restricted Share Units                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Vesting period               3 years 1 month 28 days 1 year 3 months 29 days      
Unamortized compensation expense               $ 21,047 $ 2,640      
2015 Plan                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Number of shares authorized                       223,424
Number of ordinary shares available for issuance                     443,029 219,605
2018 Plan                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Number of shares authorized                   1,018,459    
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   19,437,298 15,000,000 2,250,000 594,758 574,081            
2018 Plan | Employees and Directors                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Number of Shares, Granted               147,436        
2018 Plan | Restricted Share Units (RSUs) | Employees | Minimum                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Vesting period               2 years        
2018 Plan | Restricted Share Units (RSUs) | Employees | Maximum                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Vesting period               4 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 5,000,000                      
2021 Inducement Plan | Employees and Directors                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Number of Shares, Granted               50,000        
2015 Plan, 2018 Plan and 2021 Inducement Plan                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Number of Shares, Granted               197,436        
2015 Plan, 2018 Plan and 2021 Inducement Plan | Employee Stock Options                        
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 | Restricted Share Units (RSUs)                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Number of shares, granted/awarded               29,381