PROPERTY AND EQUIPMENT (Notes)

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

PROPERTY AND EQUIPMENT

PROPERTY AND EQUIPMENT

Property and equipment consisted of the following at December 31, 2017 and 2016 (in thousands):

	December 31,
	2017		2016
Computer and video equipment and software	$	127,322	$	120,853
Manufacturing tooling and testbeds	3,591		3,567
Office equipment	5,036		4,958
Furniture, fixtures and other	10,639		10,691
Leasehold improvements	34,779		34,780
	181,367		174,849
Less: Accumulated depreciation and amortization	159,464		144,703
Total	$	21,903	$	30,146

The Company capitalizes certain development costs incurred in connection with its internal use software. For the year ended December 31, 2017, the Company capitalized $1.9 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 $1.3 million and $5.1 million of contract labor and internal labor costs capitalized for the years ended December 31, 2016 and December 31, 2015, respectively. Internal use software is amortized on a straight line basis over its estimated useful life of three years, and the Company recorded $2.8 million, $3.0 million and $1.8 million of amortization expense during 2017, 2016 and 2015, respectively.

Depreciation and amortization expense related to property and equipment was $13.1 million, $15.2 million and $13.7 million for the years ended December 31, 2017, 2016 and 2015, respectively.