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Fixed assets (Tables)
 12 Months Ended
Dec. 31, 2019
Fixed assets [Abstract]  
Fixed assets
The components of fixed assets, net are:
 
 
 
December 31,
 
(In thousands)
 
2019
  
2018
 
Tooling, machinery and equipment
 
$
9,175
  
$
11,177
 
Furniture and office equipment
  
1,694
   
1,690
 
Computer software and equipment
  
7,062
   
6,930
 
Leasehold improvements
  
2,696
   
2,666
 
 
  
20,627
   
22,463
 
Less: Accumulated depreciation and amortization
  
(19,010
)
  
(20,518
)
 
  
1,617
   
1,945
 
Construction in-process
  
627
   
327
 
 
 
$
2,244
  
$
2,272