XML 54 R41.htm IDEA: XBRL DOCUMENT v3.20.4
Property and Equipment (Schedule of Property and Equipment) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Property, plant and equipment    
Property, plant and equipment, gross $ 992 $ 6,280
Less: accumulated depreciation and amortization (886) (6,253)
Property, Plant and Equipment, Net 106 27
Leasehold Improvements [Member]    
Property, plant and equipment    
Property, plant and equipment, gross $ 409 824
Leasehold Improvements [Member] | Minimum [Member]    
Property, plant and equipment    
Lives in years 5 years  
Leasehold Improvements [Member] | Maximum [Member]    
Property, plant and equipment    
Lives in years 15 years  
Research and Laboratory Equipment [Member]    
Property, plant and equipment    
Property, plant and equipment, gross   4,287
Research and Laboratory Equipment [Member] | Minimum [Member]    
Property, plant and equipment    
Lives in years 3 years  
Research and Laboratory Equipment [Member] | Maximum [Member]    
Property, plant and equipment    
Lives in years 5 years  
Office Equipment and Furniture [Member]    
Property, plant and equipment    
Property, plant and equipment, gross $ 583 $ 1,169
Office Equipment and Furniture [Member] | Minimum [Member]    
Property, plant and equipment    
Lives in years 3 years  
Office Equipment and Furniture [Member] | Maximum [Member]    
Property, plant and equipment    
Lives in years 5 years