Property and Equipment, Net

3 Months Ended

Mar. 31, 2023

Property, Plant and Equipment [Abstract]

Property and Equipment, Net

5. PROPERTY AND EQUIPMENT, NET

Property and equipment are stated at cost or estimated fair value for assets acquired through business combinations. Depreciation and amortization are provided using the straight-line method over the estimated useful lives of the assets. Leasehold improvements are amortized using the straight-line method over the shorter of the remaining lease term, including options that are deemed to be reasonably assured, or the estimated useful life of the improvement.

Property and equipment, net, consisted of the following:

	Estimated	March 31,			December 31,
	Useful Life	2023			2022
Lab and test equipment	7 years	$	22,992		$	21,171
Vehicles	5 years		5,841			5,732
Equipment	3-7 years		42,819			40,940
Furniture and fixtures	7 years		2,853			2,841
Leasehold improvements	7 years		8,837			8,576
Aircraft	10 years		—			931
Building	39 years		6,112			2,975
			89,454			83,166
Land			725			725
Construction in progress			3,092			3,150
Less accumulated depreciation			(52,586	)		(50,996	)
Total property and equipment—    net		$	40,685		$	36,045

Total depreciation expense included in the unaudited condensed consolidated statements of operations was $2.2 million and $1.8 million for the three months ended March 31, 2023 and March 31, 2022, respectively.