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Property and Equipment (Tables)
12 Months Ended
Dec. 31, 2016
Property, Plant and Equipment [Abstract]  
Components of Property and Equipment
Property and equipment are stated at cost. Depreciation is calculated using the straight-line method over estimated useful lives as follows:
 
Useful Lives
Building
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):
 
December 31,
2016
 
January 2,
2016
Building and building improvements
$
85,966

 
$
78,877

Machinery and equipment
41,683

 
42,460

Land
23,762

 
23,738

Computer equipment
13,549

 
15,023

Tooling
12,895

 
13,079

Furniture and office equipment
9,669

 
8,885

Leasehold improvements
8,289

 
7,734

Demonstration units
448

 
973

Vehicles
45

 
45

Construction-in-progress
7,923

 
7,124

     Total property and equipment
204,229

 
197,938

Accumulated depreciation and amortization
(68,233
)
 
(65,472
)
     Total property and equipment, net
$
135,996

 
$
132,466