Property and Equipment, Net (Tables)

9 Months Ended

Sep. 30, 2022

Property, Plant and Equipment [Abstract]

Property and Equipment, Net

Property and equipment, net, consisted of the following:

	Estimated	September 30,			December 31,
	Useful Life	2022			2021
Lab and test equipment	7 years	$	19,975		$	18,581
Vehicles	5 years		5,642			5,414
Equipment	3-7 years		38,446			35,148
Furniture and fixtures	7 years		2,895			2,844
Leasehold improvements	7 years		8,535			7,268
Aircraft	10 years		931			931
Building	39 years		2,975			2,975
			79,399			73,161
Land			725			725
Construction in progress			2,566			2,342
Less accumulated depreciation			(49,109	)		(44,707	)
Total property and equipment—    net		$	33,581		$	31,521