Commitments and Contingencies - Additional Information (Detail) - Jun. 30, 2025 $ in Millions	USD ($)	GBP (£)
Commitments And Contingencies Disclosure [Line Items]
Future contractual purchase obligation without consideration	$ 208.0
Further Indication for AMR101 | Potential Marketing Approval 1
Commitments And Contingencies Disclosure [Line Items]
Aggregate stock or cash payment upon potential market approval	6.9	£ 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	$ 6.9	£ 5,000,000