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Property and Equipment, Net (Tables)
 12 Months Ended
Dec. 31, 2020
Property and Equipment, Net [Abstract]  
Property and Equipment, Net
  
 
December 31,
 
  
Useful Lives
 
2020
  
2019
 
Machinery
  
3-15 years
 
$
21,333
  
$
21,088
 
Furniture and fixtures
  
3-15 years
  
1,209
   
1,150
 
Leasehold improvements
 
(a)
  
21,333
   
21,333
 
Computer, network equipment and software
  
3-7 years
  
2,999
   
2,787
 
Construction in progress
     
877
   
1,412
 
      
47,751
   
47,770
 
Less: accumulated depreciation and amortization
     
(40,878
)
  
(38,044
)
Total property and equipment, net
        
$
6,873
  
$
9,726
 


(a)
Leasehold improvements are amortized over the shorter of the lease term or their estimated useful lives.