Quarterly report pursuant to Section 13 or 15(d)

Property and Equipment (Schedule of Property and Equipment) (Details)

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Property and Equipment (Schedule of Property and Equipment) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 12,567 $ 11,595
Less: accumulated depreciation (4,029) (3,567)
Property and equipment, net $ 8,538 8,028
Computer Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Estimated useful life 3 years  
Property, plant and equipment, gross $ 68 $ 68
Furniture and Fixtures [Member]    
Property, Plant and Equipment [Line Items]    
Estimated useful life 5 years 5 years
Property, plant and equipment, gross $ 194 $ 181
Machinery and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Estimated useful life 5 years 5 years
Property, plant and equipment, gross $ 5,748 $ 5,748
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Estimated useful life 9 years 9 years
Property, plant and equipment, gross $ 5,099 $ 5,099
Construction in Process [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 1,458 $ 499