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Property, Plant, and Equipment - Components of Property, Plant, and Equipment (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2023
Dec. 31, 2022
Property Plant And Equipment [Line Items]    
Property, plant and equipment, gross $ 6,362 $ 6,353
Accumulated depreciation (4,970) (4,931)
Property, plant, and equipment, net 1,392 1,422
Buildings and Land [Member]    
Property Plant And Equipment [Line Items]    
Property, plant and equipment, gross 1,301 1,301
Enterprise Hardware and Software [Member]    
Property Plant And Equipment [Line Items]    
Property, plant and equipment, gross $ 1,856 1,855
Property, plant and equipment, estimated useful life 3 years  
Leaseholds [Member]    
Property Plant And Equipment [Line Items]    
Property, plant and equipment, gross $ 1,781 1,774
Property, plant and equipment, estimated useful life Lesser of lease term or estimated useful life  
Equipment [Member]    
Property Plant And Equipment [Line Items]    
Property, plant and equipment, gross $ 1,223 1,222
Property, plant and equipment, estimated useful life 7 years  
Furniture [Member]    
Property Plant And Equipment [Line Items]    
Property, plant and equipment, gross $ 201 $ 201
Property, plant and equipment, estimated useful life 5 years  
Buildings [Member]    
Property Plant And Equipment [Line Items]    
Property, plant and equipment, estimated useful life 30 years