Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation - Additional Information (Details)

v3.21.1
Share-Based Compensation - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended
Feb. 14, 2020
Dec. 05, 2018
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Jun. 10, 2020
Dec. 31, 2018
Mar. 14, 2018
May 18, 2017
Nov. 18, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                    
Ordinary shares, shares issued     179,137,432   49,431,028          
Employee Stock Options                    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                    
Unvested employee options outstanding     235,645 605,486            
Expense recognized     $ 164 $ 347            
Unamortized compensation expense share options     $ 806 $ 2,621            
Vesting period     1 year 2 months 15 days 2 years 3 months 10 days            
Restricted Share Units (RSUs)                    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                    
Expense recognized     $ 82 $ 24            
Number of shares, granted/awarded     1,198,136              
Unamortized stock compensation expense     $ 1,834 $ 36            
Stock-based compensation expense, expected weighted average period for recognition     1 year 4 months 17 days 2 months 12 days            
Restricted Share Units (RSUs) | Employees and Directors                    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                    
Number of shares, granted/awarded     1,198,136 0            
Restricted Share Units (RSUs) | Director                    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                    
Vesting period     1 year              
Restricted Share Units (RSUs) | Employees                    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                    
Vesting period     2 years              
Performance RSUs                    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                    
Expense recognized     $ 35 $ 226            
Number of shares, granted/awarded     0 1,079,000            
Unamortized stock compensation expense       $ 2,150            
Stock-based compensation expense, expected weighted average period for recognition       8 months 12 days            
Options and Restricted Share Units and Performance Restricted Share Units                    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                    
Vesting period     1 year 3 months 29 days 1 year 2 months 26 days            
Unamortized compensation expense     $ 2,640 $ 4,807            
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%                
Ordinary shares, shares issued 594,758         2,250,000 574,081      
2018 Plan | Employees and Directors                    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                    
Share options granted     0 2,000