Annual report pursuant to Section 13 and 15(d)

Property, Plant and Equipment, and Fixed Assets - Construction in Process (Schedule of Property, Plant and Equipment) (Details)

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Property, Plant and Equipment, and Fixed Assets - Construction in Process (Schedule of Property, Plant and Equipment) (Details) - USD ($)
Dec. 31, 2023
Dec. 31, 2022
Property and Equipment    
Estimated useful life 5 years  
Property, plant and equipment, gross $ 7,694,000 $ 16,841,000
Less: accumulated depreciation (4,476,000) (8,401,000)
Property, plant and equipment, net $ 3,218,000 8,440,000
Computer Equipment [Member]    
Property and Equipment    
Estimated useful life 3 years  
Property, plant and equipment, gross   145,000
Furniture and Fixtures [Member]    
Property and Equipment    
Estimated useful life 5 years  
Property, plant and equipment, gross   370,000
Machinery and Equipment [Member]    
Property and Equipment    
Estimated useful life 5 years  
Property, plant and equipment, gross   8,632,000
Leasehold Improvements [Member]    
Property and Equipment    
Estimated useful life 9 years  
Property, plant and equipment, gross $ 7,694,000 7,694,000
Construction in Process [Member]    
Property and Equipment    
Property, plant and equipment, gross $ 29,000 $ 1,000,000.0