Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2020

Property Plant And Equipment [Abstract]

Property and Equipment, Net

Property and equipment, net, as of December 31, consisted of the following:

	Estimated Useful Life	2020			2019
Lab and test equipment	7 years	$	18,631		$	14,810
Vehicles	5 years		13,320			11,073
Equipment	3-7 years		32,177			29,922
Furniture and fixtures	7 years		2,938			1,119
Leasehold improvements	7 years		6,767			5,954
Aircraft	10 years		834			—
Building	39 years		2,975			—
			77,642			62,878
Land			725			—
Construction in progress			219			796
Less accumulated depreciation and amortization			(44,187	)		(36,638	)
Total property and equipment—net		$	34,399		$	27,036