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Property, Plant, and Equipment - Components of Property, Plant, and Equipment (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Dec. 31, 2021
Property Plant And Equipment [Line Items]    
Property, plant and equipment, gross $ 6,254 $ 6,173
Accumulated depreciation (4,848) (4,825)
Property, plant, and equipment, net 1,406 1,348
Buildings and Land [Member]    
Property Plant And Equipment [Line Items]    
Property, plant and equipment, gross 1,222 1,222
Enterprise Hardware and Software [Member]    
Property Plant And Equipment [Line Items]    
Property, plant and equipment, gross $ 1,858 1,858
Property, plant and equipment, estimated useful life 3 years  
Leaseholds [Member]    
Property Plant And Equipment [Line Items]    
Property, plant and equipment, gross $ 1,788 1,796
Property, plant and equipment, estimated useful life Lesser ofleaseterm orestimatedusefullife  
Equipment [Member]    
Property Plant And Equipment [Line Items]    
Property, plant and equipment, gross $ 1,184 1,094
Property, plant and equipment, estimated useful life 7 years  
Furniture [Member]    
Property Plant And Equipment [Line Items]    
Property, plant and equipment, gross $ 202 $ 203
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