LONG-LIVED ASSETS (Notes)

12 Months Ended

Dec. 31, 2018

Property, Plant and Equipment [Abstract]

PROPERTY AND EQUIPMENT

Property and equipment consisted of the following at December 31, 2018 and 2017 (in thousands):

	December 31,
	2018		2017
Computer and video equipment and software	$	132,531	$	127,322
Manufacturing tooling and testbeds	3,635		3,591
Office equipment	4,957		5,036
Furniture, fixtures and other	10,458		10,639
Leasehold improvements	37,593		34,779
	189,174		181,367
Less: Accumulated depreciation and amortization	167,592		159,464
Total	$	21,582	$	21,903

We capitalize certain development costs incurred in connection with our internal use software. For the year ended December 31, 2018, we capitalized $4.5 million of contract labor and internal labor costs related to internal use software, and recorded the capitalized costs in computer and video equipment and software. There were $1.9 million and $1.3 million of contract labor and internal labor costs capitalized for the years ended December 31, 2017 and December 31, 2016, respectively. Internal use software is amortized on a straight line basis over its estimated useful life of three years, and we recorded $2.5 million, $2.8 million and $3.0 million of amortization expense during 2018, 2017 and 2016, respectively.

Depreciation and amortization expense related to property and equipment was $11.9 million, $13.1 million and $15.2 million for the years ended December 31, 2018, 2017 and 2016, respectively.

The following table presents our property, equipment and other long-term assets, excluding intangible assets, by geography at December 31, 2018 and 2017 (in thousands):

	December 31,
	2018		2017
Long-lived assets:
United States	$	23,774	$	24,292
Other countries	7,240		8,426
Total long-lived assets	$	31,014	$	32,718