Property and Equipment (Details) - Schedule of property and equipment - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross		$ 2,439	$ 2,623
Less accumulated depreciation and amortization		2,105	2,085
Total property and equipment		$ 334	538
Research and development equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		5 years
Property, plant and equipment, gross		$ 1,425	1,397
Office and computer equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		3 years
Property, plant and equipment, gross		$ 762	733
Autos [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		5 years
Property, plant and equipment, gross		$ 54	54
Furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life		7 years
Property, plant and equipment, gross		$ 41	41
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	[1]
Property, plant and equipment, gross		$ 112	283
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross		$ 45	$ 115

[1] Shorter of lease term or estimated useful life