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Property and Equipment Property, Plant and Equipment
3 Months Ended
Apr. 01, 2017
Property, Plant and Equipment [Abstract]  
Property and Equipment
Property and Equipment
Property and equipment, net, consists of the following (in thousands):
 
April 1,
2017
 
December 31,
2016
Building and building improvements
$
85,992

 
$
85,966

Machinery and equipment
42,246

 
41,683

Land
23,762

 
23,762

Computer equipment
14,001

 
13,549

Tooling
13,099

 
12,895

Furniture and office equipment
10,472

 
9,669

Leasehold improvements
12,931

 
8,289

Demonstration units
450

 
448

Vehicles
45

 
45

Construction-in-progress
4,829

 
7,923

     Total property and equipment
207,827

 
204,229

Accumulated depreciation and amortization
(71,672
)
 
(68,233
)
     Property and equipment, net
$
136,155

 
$
135,996


For the three months ended April 1, 2017 and April 2, 2016, depreciation expense of property and equipment was $3.5 million and $3.1 million, respectively.