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, 2017			December 31, 2016
Manufacturing equipment	$	15,456		$	24,982
Office equipment and software	18,455			23,090
Leasehold improvements	2,838			2,964
Property and equipment, gross	36,749			51,036
Less: accumulated depreciation and amortization	(32,021		)	(44,323		)
Property and equipment, net	$	4,728		$	6,713

Depreciation expense associated with property and equipment for the years ended December 31, 2017, 2016 and 2015 was $6.5 million, $4.5 million and $5.6 million. Of the $6.5 million in depreciation expense, $1.7 million is attributed to accelerated depreciation related to restructuring activities in 2017.