v3.26.1
Property and Equipment - Summary of Property and Equipment, Net (Detail) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Property Plant And Equipment [Line Items]    
Property and equipment, gross $ 8.5 $ 8.4
Less: Accumulated depreciation (6.5) (6.3)
Property and equipment, net 2.0 2.1
Furniture, Equipment and Other [Member]    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 7.1 7.0
Leasehold Improvements [Member]    
Property Plant And Equipment [Line Items]    
Property and equipment, gross $ 1.4 $ 1.4