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Fixed assets, net (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Fixed assets [Abstract]    
Fixed assets $ 19,972 $ 18,199
Less: Accumulated depreciation and amortization (17,656) (16,736)
Fixed assets, net 2,781 2,684
Tooling, Machinery and Equipment [Member]    
Fixed assets [Abstract]    
Fixed assets 6,859 6,694
Furniture and Office Equipment [Member]    
Fixed assets [Abstract]    
Fixed assets 1,882 1,660
Computer Software and Equipment [Member]    
Fixed assets [Abstract]    
Fixed assets 8,348 6,973
Leasehold Improvements [Member]    
Fixed assets [Abstract]    
Fixed assets 2,883 2,872
Fixed Assets, Excluding Construction in-Process [Member]    
Fixed assets [Abstract]    
Fixed assets, net 2,316 1,463
Construction in-Process [Member]    
Fixed assets [Abstract]    
Fixed assets $ 465 $ 1,221