Property and Equipment, Net (Details) - Schedule of property and equipment, net - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 14,811	$ 21,521
Less: accumulated depreciation	(12,288)	(12,033)
Total property and equipment, net	2,523	9,488
Shop machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	12,063	11,912
Computers and electronics [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,475	1,436
Office furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	730	744
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	543	543
Building [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross		4,801
Land [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross		1,330
Building improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross		$ 755