Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation - Additional Information (Details)

v3.23.2
Share-Based Compensation - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Nov. 24, 2021
Jun. 22, 2021
Jun. 10, 2020
Feb. 14, 2020
Dec. 05, 2018
May 18, 2017
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Jun. 23, 2021
Mar. 14, 2018
Nov. 18, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                          
Number of Shares, Granted                 857,500        
Vesting period                 4 years        
Employees and Directors                          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                          
Unvested employee options outstanding             949,235 953,721 949,235 953,721      
Employees and Directors                          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                          
Number of Shares, Granted                 857,500 152,456      
Employee Stock Options                          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                          
Expense recognized             $ 74 $ 1,682 $ 251 $ 3,363      
Unamortized compensation expense share options             1,394 18,589 $ 1,394 $ 18,589      
Vesting period                 2 years 6 months 25 days 2 years 8 months 26 days      
Restricted Share Units (RSUs)                          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                          
Expense recognized             36 302 $ 252 $ 516      
Unamortized stock compensation expense             3 989 $ 3 $ 989      
Stock-based compensation expense, expected weighted average period for recognition                 3 months 1 year 6 months 14 days      
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 and Performance Restricted Share Units                          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                          
Vesting period                 2 years 6 months 25 days 2 years 7 months 9 days      
Unamortized compensation expense             $ 1,397 $ 19,578 $ 1,397 $ 19,578      
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 | Employees and Directors                          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                          
Number of shares, granted/awarded                 0 52,857      
2018 Plan | Restricted Share Units (RSUs) | Employees | Minimum                          
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 | Maximum                          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                          
Vesting period                 4 years        
2015 Plan, 2018 Plan and 2021 Inducement Plan                          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                          
Number of Shares, Granted                 857,500        
2015 Plan, 2018 Plan and 2021 Inducement Plan | Employee Stock Options                          
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                          
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