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Property, Plant and Equipment (Schedule of Property, Plant and Equipment) (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Property and Equipment    
Property, plant and equipment, gross $ 7,694 $ 17,792
Less: accumulated depreciation (4,192) (8,401)
Property, plant and equipment, net $ 3,502 $ 9,391
Computer Equipment [Member]    
Property and Equipment    
Estimated useful life 3 years 3 years
Property, plant and equipment, gross   $ 145
Furniture and Fixtures [Member]    
Property and Equipment    
Estimated useful life 5 years 5 years
Property, plant and equipment, gross   $ 370
Machinery and Equipment [Member]    
Property and Equipment    
Estimated useful life 5 years 5 years
Property, plant and equipment, gross   $ 8,632
Leasehold Improvements [Member]    
Property and Equipment    
Estimated useful life 9 years 9 years
Property, plant and equipment, gross $ 7,694 $ 7,694
Construction in Process [Member]    
Property and Equipment    
Property, plant and equipment, gross   $ 951