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Property and Equipment (Tables)
12 Months Ended
Dec. 31, 2019
Property, Plant and Equipment [Abstract]  
Summarized Category of Fixed Assets
Property and equipment, summarized by major category, consist of the following as of December 31:
20192018
Machinery & equipment$5,635  $5,635  
Right of use, building and lease720  —  
Computer equipment & software437  406  
Office furniture & equipment174  155  
Leasehold improvements43  43  
Idle equipment679  679  
Total7,688  6,918  
Less accumulated depreciation(5,613) (3,846) 
Total property, plant & equipment, net$2,075  $3,072