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Subsequent Events - Narrative (Details)
6 Months Ended
Aug. 01, 2022
USD ($)
installment
$ / shares
shares
Aug. 01, 2022
GBP (£)
installment
shares
Jun. 30, 2022
$ / shares
shares
Jun. 30, 2021
shares
Dec. 31, 2021
$ / shares
Subsequent Event [Line Items]          
Granted (in shares)     1,217,818 312,132  
Unvested (in dollars per share) | $ / shares     $ 19.88    
Restricted Stock Units (RSUs)          
Subsequent Event [Line Items]          
Granted (in shares)     92,590    
Unvested (in dollars per share) | $ / shares     $ 11.86   $ 10.19
Chief Executive Officer | Subsequent event          
Subsequent Event [Line Items]          
Annual base salary | $ $ 580,000        
Target bonus, percentage of annual salary 60.00%        
Chief Executive Officer | Subsequent event | Inducement Grant Of Non-Qualified Share Options          
Subsequent Event [Line Items]          
Granted (in shares) 600,000 600,000      
Unvested (in dollars per share) | $ / shares $ 14.94        
Chief Executive Officer | Subsequent event | Inducement Grant Of Non-Qualified Share Options | Share-based Payment Arrangement, Tranche one          
Subsequent Event [Line Items]          
Award vesting period 10 years 10 years      
Award vesting percentage (in percent) 25.00% 25.00%      
Chief Executive Officer | Subsequent event | Inducement Grant Of Non-Qualified Share Options | Share-based Payment Arrangement, Tranche two          
Subsequent Event [Line Items]          
Share based compensation arrangement by share-based payment award, number of monthly installments | installment 36 36      
Award vesting percentage (in percent) 75.00% 75.00%      
Chief Executive Officer | Subsequent event | 2020 Share Option And Incentive Plan          
Subsequent Event [Line Items]          
Award vesting period 4 years 4 years      
Chief Executive Officer | Subsequent event | 2020 Share Option And Incentive Plan | Restricted Stock Units (RSUs)          
Subsequent Event [Line Items]          
Granted (in shares) 50,000 50,000      
Chief Executive Officer | Subsequent event | Monthly housing stipend          
Subsequent Event [Line Items]          
Compensation expenses | £   £ 12,000      
Chief Executive Officer | Subsequent event | Attorney's fees          
Subsequent Event [Line Items]          
Compensation expenses | $ $ 5,000        
Chief Executive Officer | Subsequent event | Relocation package          
Subsequent Event [Line Items]          
Compensation expenses | $ 250,000        
Chief Executive Officer | Subsequent event | Maximum          
Subsequent Event [Line Items]          
Annual base salary $ 580,000 431,000      
Maximum target bonus, percentage 125.00%        
Board of Directors Chairman | Subsequent event          
Subsequent Event [Line Items]          
Annual base salary $ 414,200 £ 346,800      
Target bonus, percentage of annual salary 55.00%        
Board of Directors Chairman | Subsequent event | Maximum          
Subsequent Event [Line Items]          
Maximum target bonus, percentage 125.00%