Property and Equipment, Net (Tables)

6 Months Ended

Jun. 30, 2022

Property Plant And Equipment [Abstract]

Property and Equipment, Net

Property and equipment, net, consisted of the following:

	Estimated	June 30,			December 31,
	Useful Life	2022			2021
Lab and test equipment	7 years	$	21,007		$	18,581
Vehicles	5 years		5,450			5,414
Equipment	3-7 years		36,698			35,148
Furniture and fixtures	7 years		2,729			2,844
Leasehold improvements	7 years		8,215			7,268
Aircraft	10 years		931			931
Building	39 years		2,975			2,975
			78,005			73,161
Land			725			725
Construction in progress			3,026			2,342
Less accumulated depreciation			(47,360	)		(44,707	)
Total property and equipment—    net		$	34,396		$	31,521