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Consolidated Variable Interest Entity - Fortis - Additional Information (Detail) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended
May 31, 2023
Mar. 31, 2024
Mar. 31, 2025
Third Party Shareholders [Member] | Nonredeemable NCI [Member]      
Business Acquisition [Line Items]      
Ownership percentage 100.00%   100.00%
Other Investors [Member] | Nonredeemable NCI [Member]      
Business Acquisition [Line Items]      
Ownership percentage 98.00%   98.00%
Series A Preferred Shares [Member] | Nonredeemable NCI [Member]      
Business Acquisition [Line Items]      
Ownership percentage 2.00%   2.00%
Fortis Therapeutics [Member]      
Business Acquisition [Line Items]      
Payment to options exercised $ 80.0    
Contingent payment associated with business acquisition 200.0    
Product development obligations $ 5.4 $ 1.7