Property and Equipment Property and Equipment (Tables)

6 Months Ended

Jul. 01, 2017

Property and equipment are stated at cost. Depreciation is calculated using the straight-line method over estimated useful lives as follows:



	Useful Lives
Buildings	39 years
Building improvements	7 to 15 years
Leasehold improvements	Lesser of useful life or term of lease
Machinery and equipment	5 to 7 years
Vehicles	5 years
Tooling	3 years
Computer equipment	2 to 6 years
Furniture and office equipment	2 to 6 years
Demonstration units	3 years

Property and equipment, net, consists of the following (in thousands):



	July 1, 2017			December 31, 2016
Building and building improvements	$	86,015		$	85,966
Machinery and equipment	43,737			41,683
Land	23,762			23,762
Leasehold improvements	14,908			8,289
Computer equipment	14,199			13,549
Tooling	13,485			12,895
Furniture and office equipment	10,719			9,669
Demonstration units	467			448
Vehicles	45			45
Construction-in-progress	5,654			7,923
Total property and equipment	212,991			204,229
Accumulated depreciation and amortization	(75,268		)	(68,233		)
Property and equipment, net	$	137,723		$	135,996