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Property and Equipment (Tables)
 9 Months Ended
Sep. 30, 2021
Property, Plant and Equipment [Abstract]  
Summarized Category of Fixed Assets Property and equipment, summarized by major category, consist of the following as of:
September 30,
2021		December 31,
2020
Machinery & equipment$4,849 $4,683 
Right of use, building lease260 471 
Computer equipment & software640 272 
Office furniture & equipment174 174 
Leasehold improvements43 43 
Idle equipment679 679 
Construction in progress— 119 
Total6,645 6,441 
Less accumulated depreciation and amortization(5,120)(5,023)
Total property and equipment, net$1,525 $1,418