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Commitments and Contingencies - Additional Information (Details)
£ in Millions
 12 Months Ended
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2021
GBP (£)
Dec. 31, 2020
USD ($)
Dec. 31, 2022
GBP (£)
Dec. 31, 2021
GBP (£)
Loss Contingencies [Line Items]            
Capital expenditure commitments $ 1,400,000 $ 1,500,000   $ 1,100,000    
Long-term debt outstanding 81,900,000          
Revolving credit facility            
Loss Contingencies [Line Items]            
Debt maximum borrowing capacity 100,000,000          
Uncommitted accordion facility 50,000,000 50,000,000        
Long-term debt outstanding 31,900,000 10,800,000        
Letter of Credit            
Loss Contingencies [Line Items]            
Debt maximum borrowing capacity 2,200,000 1,500,000        
Long-term debt outstanding 1,800,000 900,000        
Bank overdrafts            
Loss Contingencies [Line Items]            
Debt maximum borrowing capacity 4,000,000 4,000,000        
Credit facility, amount drawn 0 0        
Committed Banking Facilities            
Loss Contingencies [Line Items]            
Debt maximum borrowing capacity 100,000,000 100,000,000        
Bonding Facility For Bank Guarantees            
Loss Contingencies [Line Items]            
Debt maximum borrowing capacity 600,000 900,000     £ 0.5 £ 0.6
Long-term debt outstanding $ 200,000       £ 0.1  
Amount drawn/utilized   $ 200,000 £ 0.1