Fixed assets, net (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Fixed assets [Abstract]
Fixed assets	$ 20,725	$ 19,972
Less: Accumulated depreciation and amortization	(18,646)	(17,656)
Fixed assets, net	2,421	2,781
Tooling, Machinery and Equipment [Member]
Fixed assets [Abstract]
Fixed assets	7,562	6,859
Furniture and Office Equipment [Member]
Fixed assets [Abstract]
Fixed assets	2,078	1,882
Computer Software and Equipment [Member]
Fixed assets [Abstract]
Fixed assets	8,190	8,348
Leasehold Improvements [Member]
Fixed assets [Abstract]
Fixed assets	2,895	2,883
Fixed Assets, Excluding Construction in-Process [Member]
Fixed assets [Abstract]
Fixed assets, net	2,079	2,316
Construction in-Process [Member]
Fixed assets [Abstract]
Fixed assets	$ 342	$ 465