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Property, Plant and Equipment - Property, Plant and Equipment (Detail) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Property, Plant and Equipment [Line Items]    
Property, Plant, and Equipment, Useful Life, Term, Description [Extensible Enumeration] Leasehold improvements  
Property, plant and equipment $ 1,486 $ 1,493
Accumulated depreciation and amortization (1,470) (1,379)
Property, plant and equipment, net $ 16 114
Furniture and Fixtures    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, Useful Life 5 years  
Property, plant and equipment $ 425 432
Leasehold improvements    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment 217 217
Software    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment $ 617 617
Software | Minimum    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, Useful Life 3 years  
Software | Maximum    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, Useful Life 5 years  
Computer equipment    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment $ 227 $ 227
Computer equipment | Minimum    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, Useful Life 3 years  
Computer equipment | Maximum    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, Useful Life 5 years