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Property and Equipment, net - Component of Property and Equipment, Net (Detail) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Property, Plant and Equipment [Line Items]    
Property and equipment, Gross $ 15 $ 15
Less: accumulated depreciation (15) (13)
Property and equipment, net 0 2
Office and computer equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment, Gross $ 15 $ 15