Commitments and Contingencies - Additional Information (Detail) $ in Millions	Oct. 01, 2024 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2024 GBP (£)	Jun. 30, 2024 USD ($)
Commitments And Contingencies Disclosure [Line Items]
Future contractual purchase obligations without consideration		$ 53.0
Triggering obligations amount				$ 15.8
Accured estimated liability		7.8
Subsequent Event
Commitments And Contingencies Disclosure [Line Items]
Estimated liability	$ 7.8
Regulatory Approval in Europe
Commitments And Contingencies Disclosure [Line Items]
Additional future contractual purchase obligation without consideration		179.3
Further Indication for AMR101 | Potential Marketing Approval 1
Commitments And Contingencies Disclosure [Line Items]
Aggregate stock or cash payment upon potential market approval		6.7	£ 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		$ 6.7	£ 5,000,000