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PROPERTY AND EQUIPMENT
 12 Months Ended
Dec. 31, 2017
Property, Plant and Equipment [Abstract]  
PROPERTY AND EQUIPMENT
PROPERTY AND EQUIPMENT

Property and equipment consisted of the following (in thousands):
 
 
 
December 31,
 
Useful Life
 
2017
 
2016
Equipment
2-5 years
 
$
67,415

 
$
63,622

Software
2-5 years
 
21,977

 
19,378

Furniture and fixtures
3-5 years
 
1,892

 
698

Leasehold improvements
Shorter of the life of the lease or estimated useful life (1-5 years)
 
18,428

 
11,757

 
 
 
109,712

 
95,455

Less accumulated depreciation and amortization
 
 
(84,932
)
 
(83,714
)
Property and equipment, net
 
 
$
24,780

 
$
11,741




The Company recorded depreciation and amortization expense related to property and equipment of $8.5 million for the year ended December 31, 2017, $8.0 million for the year ended December 31, 2016 and $12.0 million for the year ended December 31, 2015. During each of the years ended December 31, 2017 and 2016, the Company disposed of certain property and equipment that was fully depreciated at the time of disposal, which resulted in reductions in both Cost and Accumulated depreciation.

Property and equipment under capital leases included in the amounts above were as follows (in thousands):
 
December 31,
 
2017
 
2016
Cost
$
664

 
$
173

Less accumulated depreciation
(180
)
 
(68
)
Property and equipment under capital leases, net
$
484

 
$
105




The net book values of the Company's property and equipment by geographic area were as follows (in thousands):
 
December 31,
 
2017
 
2016
United States
$
17,576

 
$
7,939

Canada
1,740

 
246

Asia/Pacific
3,853

 
2,963

Europe
1,400

 
593

Other
211

 
—

 
$
24,780

 
$
11,741