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Commitments and Contingencies - Additional Information (Detail) - Sep. 30, 2023
$ in Millions
USD ($)
GBP (£)
Commitments And Contingencies Disclosure [Line Items]    
Future contractual purchase obligations without consideration $ 59.0  
Accured estimated liability 8.0  
Additional estimated liability 7.8  
Regulatory Approval in Europe    
Commitments And Contingencies Disclosure [Line Items]    
Additional future contractual purchase obligations without consideration 42.5  
Maximum    
Commitments And Contingencies Disclosure [Line Items]    
Estimated liability 15.8  
Minimum    
Commitments And Contingencies Disclosure [Line Items]    
Estimated liability 8.0  
Further Indication for AMR101 | Potential Marketing Approval 1    
Commitments And Contingencies Disclosure [Line Items]    
Aggregate stock or cash payment upon potential market approval 6.1 £ 5,000,000
Further Indication for AMR101 | Potential Marketing Approval 2    
Commitments And Contingencies Disclosure [Line Items]    
Aggregate stock or cash payment upon potential market approval $ 6.1 £ 5,000,000